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Security

· 32 checks — HTTP headers, CSP, TLS handshake, and cookie hygiene rolled into one auditable list.
SCORE
82
GRADE
B
FIX
4
REVIEW
8
PASS
20
INFO
0
Checks
32
20 PASS 8 REVIEW 4 FIX
F
Empty Page Detection
Action
1 empty-page signal(s) detected -- page may be a placeholder or have content-rendering bugs
FIX
1 empty-page signal(s) detected -- page may be a placeholder or have content-rendering bugs
Critical::
Page body has only 199 chars of text -- likely empty / placeholder
After HTML stripping, the page body contains 199 characters of text content. Below 200 chars almost always means: (1) the page is a placeholder that was never filled in, (2) JavaScript was supposed to render content but failed, (3) the page is a redirect / interstitial / wrapper that should have a real status code other than 200, or (4) it's a legitimately small page like a single-form login (in which case this finding is a false positive that confirms 'minimal content' is intentional). Review the page in a browser. If content is missing, the most common root cause is a JS-rendering pipeline that needs prerendering or server-side rendering for crawlers / scanners to capture content.
Got: 199 chars
F
Subresource Integrity Adoption
Action
0% SRI adoption (0/4 third-party resources)
FIX
0% SRI adoption (0/4 third-party resources)
Warning::
SRI adoption: 0/4 third-party resources protected (0%)
Of 4 third-party `<script>` / `<link rel=stylesheet>` resources, 0 (0%) declare a Subresource Integrity hash via the `integrity=` attribute. SRI binds the page to the exact bytes of the third-party resource: if the CDN is compromised, attacker-modified bytes won't match the declared hash and the browser refuses to execute the resource. Missing SRI on (first 4 examples): - https://abs.twimg.com/responsive-web/client-web/vendor.6f0bbb5a.js - https://abs.twimg.com/responsive-web/client-web/i18n/en.8f58303a.js - https://abs.twimg.com/responsive-web/client-web/main.4b8dc5fa.js - https://accounts.google.com/gsi/client Fix: add `integrity="sha384-..."` and `crossorigin="anonymous"` attributes. Generators: srihash.org, or in-browser via `await crypto.subtle.digest('SHA-384', bytes)`. Cache-bust the resource URL when you change versions, since the integrity hash will mismatch with old cached bytes.
Got: 0% (0/4)
F
Subresource Integrity
Action
0 of 4 external resources have SRI
FIX
0 of 4 external resources have SRI
Warning::
External script from abs.twimg.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://abs.twimg.com/responsive-web/client-web/vendor.6f0bbb5a.js
Warning::
External script from abs.twimg.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://abs.twimg.com/responsive-web/client-web/i18n/en.8f58303a.js
Warning::
External script from abs.twimg.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://abs.twimg.com/responsive-web/client-web/main.4b8dc5fa.js
Warning::
External script from accounts.google.com lacks integrity attribute
Without SRI, if this CDN is compromised, attackers could inject malicious code.
Got: https://accounts.google.com/gsi/client
SRI Coverage 0 / 4 of external resources have integrity hashes
TagDomainIntegrity
<script>abs.twimg.com✗ Missing
<script>abs.twimg.com✗ Missing
<script>abs.twimg.com✗ Missing
<script>accounts.google.com✗ Missing
D
Permissions-Policy
Action
No header set
FIX
No header set
Warning::
No Permissions-Policy header
Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

No Permissions-Policy header set.

Without this header, embedded iframes can request access to sensitive device features.

Suggested header
Permissions-Policy: camera=(), microphone=(), geolocation=(), payment=(), usb=()
B
Security Headers
6 of 10 headers properly configured
REVIEW
6 of 10 headers properly configured
Info::
Strict-Transport-Security is properly configured (consider adding preload)
Got: max-age=631138519; includeSubdomains
Info::
X-Content-Type-Options is properly configured
Got: nosniff
Info::
X-Frame-Options is properly configured
Got: DENY
Warning::
Referrer-Policy header is missing
Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
Expected: strict-origin-when-cross-origin
Warning::
Permissions-Policy header is missing
Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
Expected: geolocation=(), camera=(), microphone=()
Info::
Content-Security-Policy is present
Got: connect-src 'self' blob: https://fonts.googleapis.com/css https://mapsresources-…
Info::
Cross-Origin-Opener-Policy is set but not 'same-origin'
Got: unsafe-none Expected: same-origin
Info::
Cross-Origin-Embedder-Policy is set
Got: unsafe-none
Warning::
X-Powered-By header reveals technology stack
This header discloses server technology (e.g. Express, PHP), helping attackers target known vulnerabilities. Remove it.
Got: Express
Info::
Server header is present without version info
Got: cloudflare envoy
Info::
Domain is in the Chrome HSTS preload list (status: preloaded)
Got: preloaded

Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.

Expected: strict-origin-when-cross-origin
Why this matters

Default browser behavior leaks full URLs (including query params and tokens) to every third-party resource — set a strict policy.

Learn more ▾

Without a Referrer-Policy header, browsers send the full referring URL with images, scripts, and fonts loaded from third-party origins. URLs containing tokens, user IDs, or session params end up in third-party logs. Set `Referrer-Policy: strict-origin-when-cross-origin` (or stricter) to limit leakage.

Source: MDN / W3C

Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.

Expected: geolocation=(), camera=(), microphone=()
Why this matters

Permissions-Policy locks down browser APIs you don't use — without it, every page can request camera/mic/geolocation if XSS lands.

Learn more ▾

By default every page can request the camera, microphone, geolocation, payment APIs, and dozens more. Permissions-Policy turns off the ones you don't need so a future bug can't quietly start using them. It's a defense-in-depth header — one line, big surface reduction.

Source: MDN / W3C

This header discloses server technology (e.g. Express, PHP), helping attackers target known vulnerabilities. Remove it.

Why this matters

X-Powered-By: PHP/7.4.3 advertises your stack to attackers — disable it.

Learn more ▾

X-Powered-By and similar headers (X-AspNet-Version, X-Runtime) tell attackers which versions to target. Disable in your server/framework config: PHP `expose_php=Off`, ASP.NET `<httpRuntime enableVersionHeader="false">`, Express `app.disable('x-powered-by')`.

Source: OWASP

Expected: same-origin
Why this matters

COOP is set to a less-restrictive value (same-origin-allow-popups or unsafe-none) — partial isolation only.

Learn more ▾

COOP: same-origin is the strictest level. same-origin-allow-popups allows authenticated popup windows back to your origin. unsafe-none is the legacy default (effectively off). Pick the strictest level your app's popup flows tolerate.

Source: MDN COOP

C
Content Security Policy
Action
5 of 10 CSP checks passed
REVIEW
5 of 10 CSP checks passed
Info::
Raw CSP policy
Got: connect-src 'self' blob: https://fonts.googleapis.com/css https://mapsresources-pa.googleapis.com https://maps.googleapis.com https://translate.googleapis.com https://www.gstatic.com/maps/ https://*.pscp.tv https://*.twimg.com https://*.video.pscp.tv https://*.watch.x.com https://aa.twitter.com https://aa.x.com https://accounts.google.com/gsi/ https://ads-api.twitter.com https://ads-api.x.com https://api-stream.twitter.com https://api-stream.x.com https://api.twitter.com https://api.x.ai https://api.x.com https://api.x.com https://caps.twitter.com https://caps.x.com https://grok.x.com https://jf.twitter.com https://jf.x.com https://jf-t.x.com https://pay.twitter.com https://pay.x.com https://sentry.io https://*.sentry.io https://ton-staging.atla.twitter.com https://ton-staging.atla.x.com https://ton-staging.pdxa.twitter.com https://ton-staging.pdxa.x.com https://ton.twitter.com https://ton.local.twitter.com https://ton.x.com https://twitter.com https://upload.twitter.com https://upload.x.com https://upload-a.x.com https://upload-b.x.com https://www.google-analytics.com https://x.com https://grok-api.gcp.mouseion.dev https://assets.mouseion.dev https://grok.com https://assets.grok.com https://imagine-public.x.ai/ wss://grok.com wss://grok-api.gcp.mouseion.dev https://*.adtrafficquality.google https://*.googlesyndication.com https://*.doubleclick.net https://adservice.google.com https://www.googleadservices.com https://pagead2.googlesyndication.com https://www.google.com https://google.com https://via.intercom.io https://api.intercom.io https://api.au.intercom.io https://api.eu.intercom.io https://api-iam.intercom.io https://api-iam.eu.intercom.io https://api-iam.au.intercom.io https://api-ping.intercom.io https://nexus-websocket-a.intercom.io wss://nexus-websocket-a.intercom.io https://nexus-websocket-b.intercom.io wss://nexus-websocket-b.intercom.io https://nexus-europe-websocket.intercom.io wss://nexus-europe-websocket.intercom.io https://nexus-australia-websocket.intercom.io wss://nexus-australia-websocket.intercom.io https://uploads.intercomcdn.com https://uploads.intercomcdn.eu https://uploads.au.intercomcdn.com https://uploads.eu.intercomcdn.com https://uploads.intercomusercontent.com https://livekit.grok.com wss://livekit.grok.com https://production.plaid.com/ https://sandbox.plaid.com/ https://ingestion.dv.socure.io https://network.dv.socure.io/ https://analytics.dv.socure.io/ https://payments-dev.x.com/customer/wasm/forward-with-v1.wasm https://payments-staging.x.com/customer/wasm/forward-with-v1.wasm https://payments-prod.x.com/customer/wasm/forward-with-v1.wasm https://money-dev.x.com/customer/wasm/forward-with-v1.wasm https://money-staging.x.com/customer/wasm/forward-with-v1.wasm https://money.x.com/customer/wasm/forward-with-v1.wasm https://api.stripe.com https://m.castle.io https://edge.prelude.dev https://checkoutshopper-live.adyen.com wss://*.pscp.tv https://vmap.grabyo.com https://dwo3ckksxlb0v.cloudfront.net https://media.riffsy.com https://*.giphy.com https://media.tenor.com https://c.tenor.com wss://chat-ws.x.com https://d1muhwhmpsz4u8.cloudfront.net/ https://d2bchqfeno8n2m.cloudfront.net/ https://d2shtph9y6bxk.cloudfront.net/ https://xchat-hsm-staging.x.com/ https://realm-a.x.com https://realm-b.x.com https://realm-west1.x.com https://realm-east1.x.com https://hsm-staging.x.com https://ads-twitter.com https://analytics.twitter.com https://analytics.x.com ; default-src 'self'; form-action 'self' https://twitter.com https://*.twitter.com https://x.com https://*.x.com https://localhost.twitter.com:3443 https://localhost.x.com:3443 https://accounts.x.ai https://grok.com https://intercom.help https://api-iam.intercom.io https://api-iam.eu.intercom.io https://api-iam.au.intercom.io; font-src 'self' https://*.twimg.com https://js.intercomcdn.com https://fonts.intercomcdn.com; frame-src 'self' https://accounts.google.com/ https://accounts.google.com/gsi/ https://cards-frame.twitter.com https://cdn.plaid.com/ https://client-api.arkoselabs.com/ https://content.googleapis.com/ https://iframe.arkoselabs.com/ https://mobile.twitter.com https://mobile.x.com https://pay.twitter.com https://pay.x.com https://google.com https://www.google.com https://intercom-sheets.com https://www.intercom-reporting.com https://www.youtube.com https://player.vimeo.com https://fast.wistia.net https://console.googletagservices.com https://*.doubleclick.net https://*.adtrafficquality.google https://*.safeframe.googlesyndication.com https://www.googleadservices.com https://googleadservices.com https://adservice.google.com https://*.googlesyndication.com https://td.doubleclick.net https://payments-dev.x.com/ https://payments-staging.x.com/ https://payments-prod.x.com/ https://sdn.payments-dev.x.com/ https://sdn.payments-staging.x.com/ https://sdn.payments-prod.x.com/ https://money-dev.x.com/ https://money-staging.x.com/ https://money.x.com/ https://sdn.money-dev.x.com/ https://sdn.money-staging.x.com/ https://sdn.money.x.com/ https://p2pcreditcardiframesandbox.crbcos.com https://p2pcreditcardiframe.crbcos.com https://verify-sandbox.plaid.com/ https://*.js.stripe.com https://js.stripe.com https://hooks.stripe.com https://cdn.getpinwheel.com/ https://artifacts.grokusercontent.com https://twitter.com https://x.com https://studio.x.com https://studio-dev.x.com https://recaptcha.net/recaptcha/; img-src 'self' blob: data: https://www.google.com/maps/place/ https://imgs.search.brave.com https://*.cdn.twitter.com https://*.cdn.x.com https://ton.twitter.com https://ton.x.com https://*.twimg.com https://analytics.twitter.com https://analytics.x.com https://cm.g.doubleclick.net https://www.google-analytics.com https://maps.googleapis.com https://www.periscope.tv https://www.pscp.tv https://ads-twitter.com https://ads-api.twitter.com https://ads-api.x.com https://api.x.com https://developer.x.com blob: data: https://js.intercomcdn.com https://static.intercomassets.com https://downloads.intercomcdn.com https://downloads.intercomcdn.eu https://downloads.au.intercomcdn.com https://uploads.intercomusercontent.com https://gifs.intercomcdn.com https://video-messages.intercomcdn.com https://messenger-apps.intercom.io https://messenger-apps.eu.intercom.io https://messenger-apps.au.intercom.io https://*.intercom-attachments-1.com https://*.intercom-attachments.eu https://*.au.intercom-attachments.com https://*.intercom-attachments-2.com https://*.intercom-attachments-3.com https://*.intercom-attachments-4.com https://*.intercom-attachments-5.com https://*.intercom-attachments-6.com https://*.intercom-attachments-7.com https://*.intercom-attachments-8.com https://*.intercom-attachments-9.com https://static.intercomassets.eu https://static.au.intercomassets.com https://media.riffsy.com https://*.giphy.com https://media.tenor.com https://c.tenor.com https://*.pscp.tv https://*.periscope.tv https://prod-periscope-profile.s3-us-west-2.amazonaws.com https://platform-lookaside.fbsbx.com https://scontent.xx.fbcdn.net https://scontent-sea1-1.xx.fbcdn.net https://*.googleusercontent.com https://t.co/1/i/adsct https://*.googleusercontent.com https://*.gstatic.com https://*.googlesyndication.com https://*.adtrafficquality.google https://www.google.com/ads/measurement/ https://*.google.com/ads/measurement/ https://googleads.g.doubleclick.net https://google.com https://www.google.com https://plaid-merchant-logos.plaid.com https://plaid-counterparty-logos.plaid.com https://client-logos.plaid.com https://assets.mouseion.dev https://assets.grok.com; manifest-src 'self'; media-src 'self' data: blob: https://twitter.com https://x.com https://*.twimg.com https://*.vine.co https://*.pscp.tv https://*.video.pscp.tv https://*.watch.x.com https://js.intercomcdn.com https://downloads.intercomcdn.com https://downloads.intercomcdn.eu https://downloads.au.intercomcdn.com https://dwo3ckksxlb0v.cloudfront.net; object-src 'none'; script-src 'self' 'unsafe-inline' https://*.twimg.com https://recaptcha.net/recaptcha/ http://www.gstatic.com/cast/sdk/libs/caf_receiver/v3/cast_receiver_framework.js https://accounts.google.com/gsi/client https://apis.google.com/js/api.js https://appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.js https://client-api.arkoselabs.com/ https://static.ads-twitter.com https://twitter.com https://www.google-analytics.com https://www.gstatic.com/cast/sdk/libs/caf_receiver/v3/cast_receiver_framework.js https://x.com https://sdn.payments-dev.x.com/assets/loader.min.js https://sdn.payments-staging.x.com/assets/loader.min.js https://sdn.payments-prod.x.com/assets/loader.min.js https://sdn.money-dev.x.com/assets/loader.min.js https://sdn.money-staging.x.com/assets/loader.min.js https://sdn.money.x.com/assets/loader.min.js https://sdk.dv.socure.io/latest/device-risk-sdk.js https://cdn.plaid.com/link/v2/stable/link-initialize.js https://payments-dev.x.com/customer/wasm/xxp-forward-with-sdk.js https://payments-staging.x.com/customer/wasm/xxp-forward-with-sdk.js https://payments-prod.x.com/customer/wasm/xxp-forward-with-sdk.js https://money-dev.x.com/customer/wasm/xxp-forward-with-sdk.js https://money-staging.x.com/customer/wasm/xxp-forward-with-sdk.js https://money.x.com/customer/wasm/xxp-forward-with-sdk.js https://js.stripe.com https://*.js.stripe.com https://cdn.getpinwheel.com/pinwheel-v3.2.1.js https://securepubads.g.doubleclick.net https://www.googletagservices.com https://*.googletagservices.com https://pagead2.googlesyndication.com https://adservice.google.com https://www.googleadservices.com https://ads.google.com https://tpc.googlesyndication.com https://*.tpc.googlesyndication.com https://googleads.g.doubleclick.net https://app.intercom.io https://widget.intercom.io https://js.intercomcdn.com 'wasm-unsafe-eval' 'nonce-MWFhYTBjZDUtNGE3ZC00ZGE2LTg2ZDktZDAyMjM4YmU4Yjg2'; style-src 'self' 'unsafe-inline' https://accounts.google.com/gsi/style https://*.twimg.com; child-src 'self' blob:; worker-src 'self' blob: https://*.twimg.com; report-uri https://x.com/i/csp_report?a=O5RXE%3D%3D%3D&ro=false
Info::
default-src directive is set
Got: default-src 'self'
Critical::
'unsafe-inline' found in script source
'unsafe-inline' allows inline <script> tags, defeating CSP against XSS. Remove it and use nonces or hashes instead.
Got: script-src 'self' 'unsafe-inline' https://*.twimg.com https://recaptcha.net/recaptcha/ http://www.gstatic.com/cast/sdk/libs/caf_receiver/v3/cast_receiver_framework.js https://accounts.google.com/gsi/client https://apis.google.com/js/api.js https://appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.js https://client-api.arkoselabs.com/ https://static.ads-twitter.com https://twitter.com https://www.google-analytics.com https://www.gstatic.com/cast/sdk/libs/caf_receiver/v3/cast_receiver_framework.js https://x.com https://sdn.payments-dev.x.com/assets/loader.min.js https://sdn.payments-staging.x.com/assets/loader.min.js https://sdn.payments-prod.x.com/assets/loader.min.js https://sdn.money-dev.x.com/assets/loader.min.js https://sdn.money-staging.x.com/assets/loader.min.js https://sdn.money.x.com/assets/loader.min.js https://sdk.dv.socure.io/latest/device-risk-sdk.js https://cdn.plaid.com/link/v2/stable/link-initialize.js https://payments-dev.x.com/customer/wasm/xxp-forward-with-sdk.js https://payments-staging.x.com/customer/wasm/xxp-forward-with-sdk.js https://payments-prod.x.com/customer/wasm/xxp-forward-with-sdk.js https://money-dev.x.com/customer/wasm/xxp-forward-with-sdk.js https://money-staging.x.com/customer/wasm/xxp-forward-with-sdk.js https://money.x.com/customer/wasm/xxp-forward-with-sdk.js https://js.stripe.com https://*.js.stripe.com https://cdn.getpinwheel.com/pinwheel-v3.2.1.js https://securepubads.g.doubleclick.net https://www.googletagservices.com https://*.googletagservices.com https://pagead2.googlesyndication.com https://adservice.google.com https://www.googleadservices.com https://ads.google.com https://tpc.googlesyndication.com https://*.tpc.googlesyndication.com https://googleads.g.doubleclick.net https://app.intercom.io https://widget.intercom.io https://js.intercomcdn.com 'wasm-unsafe-eval' 'nonce-MWFhYTBjZDUtNGE3ZC00ZGE2LTg2ZDktZDAyMjM4YmU4Yjg2'
Info::
No 'unsafe-eval' in script source
Info::
No wildcard in script source
Info::
object-src is set to 'none'
Got: object-src 'none'
Warning::
base-uri directive is missing
Without base-uri, attackers can inject a <base> tag to hijack relative URLs. Set it to 'self' or 'none'.
Expected: base-uri 'self'
Warning::
frame-ancestors directive is missing
frame-ancestors controls who can embed your page, preventing clickjacking. Set it to 'self' or 'none'.
Expected: frame-ancestors 'self'
Info::
form-action directive is set
Got: form-action 'self' https://twitter.com https://*.twitter.com https://x.com https://*.x.com https://localhost.twitter.com:3443 https://localhost.x.com:3443 https://accounts.x.ai https://grok.com https://intercom.help https://api-iam.intercom.io https://api-iam.eu.intercom.io https://api-iam.au.intercom.io
Info::
upgrade-insecure-requests is not set
This directive upgrades HTTP resources to HTTPS automatically, preventing mixed content.
Expected: upgrade-insecure-requests

'unsafe-inline' allows inline <script> tags, defeating CSP against XSS. Remove it and use nonces or hashes instead.

Why this matters

Unsafe value (unsafe-inline, unsafe-eval) in script-src defeats CSP's main protection — XSS injections can execute again.

Learn more ▾

unsafe-inline allows inline <script> tags; unsafe-eval allows eval() and similar. Both are necessary for some legacy code but explicitly dangerous. Migrate to nonces (per-page random tokens) or hashes (per-script SHA-256) instead.

Source: OWASP CSP / MDN

Without base-uri, attackers can inject a <base> tag to hijack relative URLs. Set it to 'self' or 'none'.

Expected: base-uri 'self'
Why this matters

Missing base-uri in CSP leaves a base-tag injection attack path open even on otherwise strict policies.

Learn more ▾

A common omission: developers add CSP for script-src and frame-ancestors but forget base-uri. The result is a CSP that looks strict but lets an attacker rewrite every URL on the page via <base href>. Add `base-uri 'self'` to close the gap.

Source: MDN CSP

frame-ancestors controls who can embed your page, preventing clickjacking. Set it to 'self' or 'none'.

Expected: frame-ancestors 'self'
Why this matters

Security gaps expose your site and users to attacks, eroding trust.

This directive upgrades HTTP resources to HTTPS automatically, preventing mixed content.

Expected: upgrade-insecure-requests
Why this matters

Without upgrade-insecure-requests, any HTTP subresource link survives as a mixed-content warning instead of auto-upgrading.

Learn more ▾

Adding `upgrade-insecure-requests` to your CSP turns every http:// subresource fetch into https:// at the browser layer. One-line defense against accidental mixed content from legacy links or third-party widgets.

Source: MDN CSP

Parsed Policy

connect-src 'self'blob:https://fonts.googleapis.com/csshttps://mapsresources-pa.googleapis.comhttps://maps.googleapis.comhttps://translate.googleapis.comhttps://www.gstatic.com/maps/https://*.pscp.tvhttps://*.twimg.comhttps://*.video.pscp.tvhttps://*.watch.x.comhttps://aa.twitter.comhttps://aa.x.comhttps://accounts.google.com/gsi/https://ads-api.twitter.comhttps://ads-api.x.comhttps://api-stream.twitter.comhttps://api-stream.x.comhttps://api.twitter.comhttps://api.x.aihttps://api.x.comhttps://api.x.comhttps://caps.twitter.comhttps://caps.x.comhttps://grok.x.comhttps://jf.twitter.comhttps://jf.x.comhttps://jf-t.x.comhttps://pay.twitter.comhttps://pay.x.comhttps://sentry.iohttps://*.sentry.iohttps://ton-staging.atla.twitter.comhttps://ton-staging.atla.x.comhttps://ton-staging.pdxa.twitter.comhttps://ton-staging.pdxa.x.comhttps://ton.twitter.comhttps://ton.local.twitter.comhttps://ton.x.comhttps://twitter.comhttps://upload.twitter.comhttps://upload.x.comhttps://upload-a.x.comhttps://upload-b.x.comhttps://www.google-analytics.comhttps://x.comhttps://grok-api.gcp.mouseion.devhttps://assets.mouseion.devhttps://grok.comhttps://assets.grok.comhttps://imagine-public.x.ai/wss://grok.comwss://grok-api.gcp.mouseion.devhttps://*.adtrafficquality.googlehttps://*.googlesyndication.comhttps://*.doubleclick.nethttps://adservice.google.comhttps://www.googleadservices.comhttps://pagead2.googlesyndication.comhttps://www.google.comhttps://google.comhttps://via.intercom.iohttps://api.intercom.iohttps://api.au.intercom.iohttps://api.eu.intercom.iohttps://api-iam.intercom.iohttps://api-iam.eu.intercom.iohttps://api-iam.au.intercom.iohttps://api-ping.intercom.iohttps://nexus-websocket-a.intercom.iowss://nexus-websocket-a.intercom.iohttps://nexus-websocket-b.intercom.iowss://nexus-websocket-b.intercom.iohttps://nexus-europe-websocket.intercom.iowss://nexus-europe-websocket.intercom.iohttps://nexus-australia-websocket.intercom.iowss://nexus-australia-websocket.intercom.iohttps://uploads.intercomcdn.comhttps://uploads.intercomcdn.euhttps://uploads.au.intercomcdn.comhttps://uploads.eu.intercomcdn.comhttps://uploads.intercomusercontent.comhttps://livekit.grok.comwss://livekit.grok.comhttps://production.plaid.com/https://sandbox.plaid.com/https://ingestion.dv.socure.iohttps://network.dv.socure.io/https://analytics.dv.socure.io/https://payments-dev.x.com/customer/wasm/forward-with-v1.wasmhttps://payments-staging.x.com/customer/wasm/forward-with-v1.wasmhttps://payments-prod.x.com/customer/wasm/forward-with-v1.wasmhttps://money-dev.x.com/customer/wasm/forward-with-v1.wasmhttps://money-staging.x.com/customer/wasm/forward-with-v1.wasmhttps://money.x.com/customer/wasm/forward-with-v1.wasmhttps://api.stripe.comhttps://m.castle.iohttps://edge.prelude.devhttps://checkoutshopper-live.adyen.comwss://*.pscp.tvhttps://vmap.grabyo.comhttps://dwo3ckksxlb0v.cloudfront.nethttps://media.riffsy.comhttps://*.giphy.comhttps://media.tenor.comhttps://c.tenor.comwss://chat-ws.x.comhttps://d1muhwhmpsz4u8.cloudfront.net/https://d2bchqfeno8n2m.cloudfront.net/https://d2shtph9y6bxk.cloudfront.net/https://xchat-hsm-staging.x.com/https://realm-a.x.comhttps://realm-b.x.comhttps://realm-west1.x.comhttps://realm-east1.x.comhttps://hsm-staging.x.comhttps://ads-twitter.comhttps://analytics.twitter.comhttps://analytics.x.com
default-src 'self'
form-action 'self'https://twitter.comhttps://*.twitter.comhttps://x.comhttps://*.x.comhttps://localhost.twitter.com:3443https://localhost.x.com:3443https://accounts.x.aihttps://grok.comhttps://intercom.helphttps://api-iam.intercom.iohttps://api-iam.eu.intercom.iohttps://api-iam.au.intercom.io
font-src 'self'https://*.twimg.comhttps://js.intercomcdn.comhttps://fonts.intercomcdn.com
frame-src 'self'https://accounts.google.com/https://accounts.google.com/gsi/https://cards-frame.twitter.comhttps://cdn.plaid.com/https://client-api.arkoselabs.com/https://content.googleapis.com/https://iframe.arkoselabs.com/https://mobile.twitter.comhttps://mobile.x.comhttps://pay.twitter.comhttps://pay.x.comhttps://google.comhttps://www.google.comhttps://intercom-sheets.comhttps://www.intercom-reporting.comhttps://www.youtube.comhttps://player.vimeo.comhttps://fast.wistia.nethttps://console.googletagservices.comhttps://*.doubleclick.nethttps://*.adtrafficquality.googlehttps://*.safeframe.googlesyndication.comhttps://www.googleadservices.comhttps://googleadservices.comhttps://adservice.google.comhttps://*.googlesyndication.comhttps://td.doubleclick.nethttps://payments-dev.x.com/https://payments-staging.x.com/https://payments-prod.x.com/https://sdn.payments-dev.x.com/https://sdn.payments-staging.x.com/https://sdn.payments-prod.x.com/https://money-dev.x.com/https://money-staging.x.com/https://money.x.com/https://sdn.money-dev.x.com/https://sdn.money-staging.x.com/https://sdn.money.x.com/https://p2pcreditcardiframesandbox.crbcos.comhttps://p2pcreditcardiframe.crbcos.comhttps://verify-sandbox.plaid.com/https://*.js.stripe.comhttps://js.stripe.comhttps://hooks.stripe.comhttps://cdn.getpinwheel.com/https://artifacts.grokusercontent.comhttps://twitter.comhttps://x.comhttps://studio.x.comhttps://studio-dev.x.comhttps://recaptcha.net/recaptcha/
img-src 'self'blob:data:https://www.google.com/maps/place/https://imgs.search.brave.comhttps://*.cdn.twitter.comhttps://*.cdn.x.comhttps://ton.twitter.comhttps://ton.x.comhttps://*.twimg.comhttps://analytics.twitter.comhttps://analytics.x.comhttps://cm.g.doubleclick.nethttps://www.google-analytics.comhttps://maps.googleapis.comhttps://www.periscope.tvhttps://www.pscp.tvhttps://ads-twitter.comhttps://ads-api.twitter.comhttps://ads-api.x.comhttps://api.x.comhttps://developer.x.comblob:data:https://js.intercomcdn.comhttps://static.intercomassets.comhttps://downloads.intercomcdn.comhttps://downloads.intercomcdn.euhttps://downloads.au.intercomcdn.comhttps://uploads.intercomusercontent.comhttps://gifs.intercomcdn.comhttps://video-messages.intercomcdn.comhttps://messenger-apps.intercom.iohttps://messenger-apps.eu.intercom.iohttps://messenger-apps.au.intercom.iohttps://*.intercom-attachments-1.comhttps://*.intercom-attachments.euhttps://*.au.intercom-attachments.comhttps://*.intercom-attachments-2.comhttps://*.intercom-attachments-3.comhttps://*.intercom-attachments-4.comhttps://*.intercom-attachments-5.comhttps://*.intercom-attachments-6.comhttps://*.intercom-attachments-7.comhttps://*.intercom-attachments-8.comhttps://*.intercom-attachments-9.comhttps://static.intercomassets.euhttps://static.au.intercomassets.comhttps://media.riffsy.comhttps://*.giphy.comhttps://media.tenor.comhttps://c.tenor.comhttps://*.pscp.tvhttps://*.periscope.tvhttps://prod-periscope-profile.s3-us-west-2.amazonaws.comhttps://platform-lookaside.fbsbx.comhttps://scontent.xx.fbcdn.nethttps://scontent-sea1-1.xx.fbcdn.nethttps://*.googleusercontent.comhttps://t.co/1/i/adscthttps://*.googleusercontent.comhttps://*.gstatic.comhttps://*.googlesyndication.comhttps://*.adtrafficquality.googlehttps://www.google.com/ads/measurement/https://*.google.com/ads/measurement/https://googleads.g.doubleclick.nethttps://google.comhttps://www.google.comhttps://plaid-merchant-logos.plaid.comhttps://plaid-counterparty-logos.plaid.comhttps://client-logos.plaid.comhttps://assets.mouseion.devhttps://assets.grok.com
manifest-src 'self'
media-src 'self'data:blob:https://twitter.comhttps://x.comhttps://*.twimg.comhttps://*.vine.cohttps://*.pscp.tvhttps://*.video.pscp.tvhttps://*.watch.x.comhttps://js.intercomcdn.comhttps://downloads.intercomcdn.comhttps://downloads.intercomcdn.euhttps://downloads.au.intercomcdn.comhttps://dwo3ckksxlb0v.cloudfront.net
object-src 'none'
script-src 'self''unsafe-inline'https://*.twimg.comhttps://recaptcha.net/recaptcha/http://www.gstatic.com/cast/sdk/libs/caf_receiver/v3/cast_receiver_framework.jshttps://accounts.google.com/gsi/clienthttps://apis.google.com/js/api.jshttps://appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.jshttps://client-api.arkoselabs.com/https://static.ads-twitter.comhttps://twitter.comhttps://www.google-analytics.comhttps://www.gstatic.com/cast/sdk/libs/caf_receiver/v3/cast_receiver_framework.jshttps://x.comhttps://sdn.payments-dev.x.com/assets/loader.min.jshttps://sdn.payments-staging.x.com/assets/loader.min.jshttps://sdn.payments-prod.x.com/assets/loader.min.jshttps://sdn.money-dev.x.com/assets/loader.min.jshttps://sdn.money-staging.x.com/assets/loader.min.jshttps://sdn.money.x.com/assets/loader.min.jshttps://sdk.dv.socure.io/latest/device-risk-sdk.jshttps://cdn.plaid.com/link/v2/stable/link-initialize.jshttps://payments-dev.x.com/customer/wasm/xxp-forward-with-sdk.jshttps://payments-staging.x.com/customer/wasm/xxp-forward-with-sdk.jshttps://payments-prod.x.com/customer/wasm/xxp-forward-with-sdk.jshttps://money-dev.x.com/customer/wasm/xxp-forward-with-sdk.jshttps://money-staging.x.com/customer/wasm/xxp-forward-with-sdk.jshttps://money.x.com/customer/wasm/xxp-forward-with-sdk.jshttps://js.stripe.comhttps://*.js.stripe.comhttps://cdn.getpinwheel.com/pinwheel-v3.2.1.jshttps://securepubads.g.doubleclick.nethttps://www.googletagservices.comhttps://*.googletagservices.comhttps://pagead2.googlesyndication.comhttps://adservice.google.comhttps://www.googleadservices.comhttps://ads.google.comhttps://tpc.googlesyndication.comhttps://*.tpc.googlesyndication.comhttps://googleads.g.doubleclick.nethttps://app.intercom.iohttps://widget.intercom.iohttps://js.intercomcdn.com'wasm-unsafe-eval''nonce-MWFhYTBjZDUtNGE3ZC00ZGE2LTg2ZDktZDAyMjM4YmU4Yjg2'
style-src 'self''unsafe-inline'https://accounts.google.com/gsi/stylehttps://*.twimg.com
child-src 'self'blob:
worker-src 'self'blob:https://*.twimg.com
report-uri https://x.com/i/csp_report?a=O5RXE%3D%3D%3D&ro=false
B
security.txt
Vulnerability disclosure policy
REVIEW
Vulnerability disclosure policy
Info::
security.txt found
Got: https://twitter.com/.well-known/security.txt
Warning::
security.txt has expired
The Expires field is 2024-01-01T06:00:00.000Z, which is in the past. Update it.
Info::
security.txt is PGP signed

security.txt

Contact: https://hackerone.com/twitter
Expires: 2024-01-01T06:00:00.000Z
Encryption: https://twitter.com/security/pgp-key.txt
Policy: https://twitter.com/.well-known/security.txt
B
CSP Inline-Style Readiness
5 inline style attribute(s) detected
REVIEW
5 inline style attribute(s) detected
Info::
5 inline style attribute(s) detected
Each `style=""` attribute forces `style-src 'unsafe-inline'` in any Content-Security-Policy, which negates most of CSP's XSS-mitigation value. 5 inline style(s) is low. Affected element types include: body, div, button. Move styles to a stylesheet; use CSS custom properties for runtime-dynamic values; or adopt a nonce/hash CSP policy. Most teams take the stylesheet path because it's also a maintainability win.
B
Trusted Types (XSS Sink Hardening)
Trusted Types not enabled
REVIEW
Trusted Types not enabled
Info::
Trusted Types not enabled
Trusted Types (CSP3) is a Chrome 83+ defense that requires DOM-XSS sinks (innerHTML, document.write, eval, ...) to receive a typed-and-sanitized value rather than a raw string. Adding `Content-Security-Policy: require-trusted-types-for 'script'; trusted-types default` neutralizes most DOM-XSS even when a payload reaches a sink. Adoption is currently ~0.1% of pages so this is informational; a roll-out usually starts in report-only mode.
C
Permissions-Policy Granularity
Action
No Permissions-Policy header set -- powerful features (camera / microphone / geolocation / payment / USB) default to allow-on-same-origin
REVIEW
No Permissions-Policy header set -- powerful features (camera / microphone / geolocation / payment / USB) default to allow-on-same-origin
Warning::
Permissions-Policy header not set -- features default to allow-on-same-origin
Without a `Permissions-Policy` (or legacy `Feature-Policy`) header, every powerful browser feature defaults to its spec default policy (typically `self`). A third-party iframe injected via XSS or a misconfigured embed can still request access to the user's camera, microphone, geolocation, payment APIs, USB devices, etc. Explicitly deny features the page doesn't need: ``` Permissions-Policy: camera=(), microphone=(), geolocation=(), payment=(), usb=(), accelerometer=(), gyroscope=() ``` Features the page legitimately uses can stay enabled with `feature=(self)`.
Got: header absent
B
Referrer-Policy Strictness
Referrer-Policy header not set -- browser default applies (modern: strict-origin-when-cross-origin; legacy browsers: no-referrer-when-downgrade)
REVIEW
Referrer-Policy header not set -- browser default applies (modern: strict-origin-when-cross-origin; legacy browsers: no-referrer-when-downgrade)
Info::
Referrer-Policy header not set -- browser default applies
Without an explicit `Referrer-Policy` header, the browser falls back to its default policy. Modern browsers (Chrome 85+, Firefox 87+, Safari 15+) default to `strict-origin-when-cross-origin`, which is privacy-safe. Legacy browsers default to the leaky `no-referrer-when-downgrade`, which sends the full URL (including path + query) on cross-origin HTTPS-to-HTTPS requests. Set an explicit header to ensure consistent behavior: ``` Referrer-Policy: strict-origin-when-cross-origin ``` This matches the modern browser default and is privacy-safe without breaking referrer-based same-origin analytics.
Got: header absent
B
CORS Configuration
No CORS headers
REVIEW
No CORS headers
Info::
No CORS headers present — secure default
CORS Configuration ✓ Secure

No CORS headers detected.

Cross-origin requests are blocked by browser same-origin policy.

Origin reflection test

Some servers mirror the request Origin header, which can be exploited. Test manually:

curl -sI -H "Origin: https://evil.com" <url> | grep -i access-control
A+
TLS & Certificates
TLS 1.3, 7 checks passed
PASS
TLS 1.3, 7 checks passed
Info::
TLS 1.3 is used
Got: TLS 1.3
Info::
Strong cipher suite is used
Got: TLS_CHACHA20_POLY1305_SHA256
Info::
HTTP/2 is not negotiated
HTTP/2 provides multiplexing and header compression for better performance.
Got: http/1.1
Info::
OCSP stapling not enabled
Without stapling, the browser performs a separate OCSP roundtrip on first connection -- adding latency and leaking the visited host to the CA. Enable OCSP stapling on your TLS server.
Info::
Certificate is valid (expires in 42 days)
Got: 2026-08-22T05:44:38Z
Info::
Certificate chain has 2 certificates
Info::
Certificate uses modern signature algorithm
Got: ECDSA-SHA384
Info::
Certificate covers 3 domain(s)
Got: *.twitter.com, cdn.syndication.twitter.com, twitter.com
Info::
Certificate is issued by a trusted CA
Got: CN=E8,O=Let's Encrypt,C=US

HTTP/2 provides multiplexing and header compression for better performance.

Why this matters

HTTP/1.1 forces the browser to make sequential requests, multiplying latency on every page.

Learn more ▾

HTTP/2 (and HTTP/3) multiplex many requests over a single connection, eliminating head-of-line blocking. HTTP/1.1 forces the browser to either queue requests or open many parallel connections — both worse. Most modern web servers support HTTP/2 with one config line.

Source: MDN Web Docs

Without stapling, the browser performs a separate OCSP roundtrip on first connection -- adding latency and leaking the visited host to the CA. Enable OCSP stapling on your TLS server.

Why this matters

Without OCSP stapling, every first-time visitor pays an extra OCSP roundtrip — and the CA learns who's visiting your site.

Learn more ▾

OCSP stapling has the server fetch its own revocation status from the CA and attach the signed response to the TLS handshake. Without it, browsers contact the CA directly: extra latency for the user and a privacy leak (the CA sees who connected). Enable ssl_stapling on (nginx) / SSLUseStapling On (Apache) / OCSPStapling = on (Caddy auto-enables).

Source: RFC 6961 / Mozilla Server-Side TLS guide

Connection
Protocol
TLS 1.3
Cipher Suite
TLS_CHACHA20_POLY1305_SHA256
HTTP Version
HTTP/1.1

Certificate Chain

Leaf Certificate
Subject CN=twitter.comIssuer CN=E8,O=Let's Encrypt,C=USValid 2026-05-24T05:44:39Z → 2026-08-22T05:44:38ZExpires in 42 days SANs *.twitter.com, cdn.syndication.twitter.com, twitter.comSignature ECDSA-SHA384Serial 5406190e7737ba15e5b4615ef5becdfb46e
Intermediate (CA Certificate)
Subject CN=E8,O=Let's Encrypt,C=USIssuer CN=ISRG Root X1,O=Internet Security Research Group,C=USValid 2024-03-13T00:00:00Z → 2027-03-12T23:59:59ZExpires in 245 days Signature SHA256-RSASerial 63959363c24e7082715918bfc3d7ed56
A
Cookie Security
6 cookies analyzed, 13 checks passed
PASS
6 cookies analyzed, 13 checks passed
Info::
Cookie 'guest_id_marketing' has the Secure flag
Warning::
Cookie 'guest_id_marketing' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie 'guest_id_marketing' has SameSite=None
Info::
Cookie 'guest_id_ads' has the Secure flag
Warning::
Cookie 'guest_id_ads' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie 'guest_id_ads' has SameSite=None
Info::
Cookie 'personalization_id' has the Secure flag
Warning::
Cookie 'personalization_id' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie 'personalization_id' has SameSite=None
Info::
Cookie 'guest_id' has the Secure flag
Warning::
Cookie 'guest_id' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie 'guest_id' has SameSite=None
Info::
Cookie 'ct0' has the Secure flag
Warning::
Cookie 'ct0' is missing the HttpOnly flag
Without HttpOnly, this cookie can be accessed by JavaScript, making it vulnerable to XSS-based theft.
Info::
Cookie 'ct0' has SameSite=Lax
Info::
Cookie '__cf_bm' has the Secure flag
Info::
Cookie '__cf_bm' has the HttpOnly flag
Info::
Cookie '__cf_bm' has SameSite=None
6 cookies analyzed 5 warnings
NameSecureHttpOnlySameSiteSizeIssues
guest_id_marketing✓✗None41 B1
guest_id_ads✓✗None35 B1
personalization_id✓✗None45 B1
guest_id✓✗None31 B3
ct0✓✗Lax3 B1
__cf_bm✓✓None205 B—
A
WAF / Bot Protection
Cloudflare
PASS
Cloudflare
Info::
Cloudflare detected
Detected via: cf-ray: a18f229e5b8a1d47-SIN
Got: Cloudflare
A+
Cross-Origin Tab Safety
All 12 new-tab link(s) carry rel=noopener
PASS
All 12 new-tab link(s) carry rel=noopener
Info::
All 12 new-tab link(s) carry rel=noopener
A+
Bot Challenge Detection
Scan reached real page content (no bot-protection interstitial)
PASS
Scan reached real page content (no bot-protection interstitial)
Info::
No bot-protection interstitial detected -- the rest of the report reflects the real page
A+
Soft-404 Detection
HTTP status is non-2xx -- soft-404 check is N/A
PASS
HTTP status is non-2xx -- soft-404 check is N/A
Info::
HTTP status is non-2xx -- soft-404 check is N/A
A+
Geo-Restriction Detection
No geo-restriction signals detected -- scan reached the page from an allowed region
PASS
No geo-restriction signals detected -- scan reached the page from an allowed region
Info::
No geo-restriction detected
A+
Maintenance Mode Detection
No maintenance-mode signals detected -- scan reached a normal page
PASS
No maintenance-mode signals detected -- scan reached a normal page
Info::
No maintenance-mode signals detected
A+
CORS Depth
No CORS response headers -- the resource is same-origin-only by browser default
PASS
No CORS response headers -- the resource is same-origin-only by browser default
Info::
No CORS response headers -- the resource is same-origin-only by browser default
A+
Source Map Exposure
Source-map probe didn't run on this scan
PASS
Source-map probe didn't run on this scan
Info::
Source-map probe didn't run on this scan
A+
HTML Version Disclosure
No software-version disclosures in HTML
PASS
No software-version disclosures in HTML
Info::
No software-version disclosures in HTML
A+
Open Redirect Surface
No redirect-shaped query parameters in DOM links
PASS
No redirect-shaped query parameters in DOM links
Info::
No redirect-shaped query parameters in DOM links
A+
Auth Security
Page is not a login form -- auth-security checks are N/A
PASS
Page is not a login form -- auth-security checks are N/A
Info::
Page does not appear to be a login form
A+
Subdomain Inventory Exposure
No risky subdomain names in certificate SANs
PASS
No risky subdomain names in certificate SANs
Info::
No risky subdomain names in certificate SANs
A+
JS Library Vulnerabilities
No known vulnerabilities
PASS
No known vulnerabilities
Info::
No known JavaScript library vulnerabilities detected

No known JavaScript library vulnerabilities detected.

A+
Information Leakage
No exposures
PASS
No exposures
Info::
security.txt is present — good practice
Info::
No sensitive files exposed

No sensitive files exposed — all paths returned 404.

PathStatusCategoryRisk
/.git/HEAD✓ Not foundVersion Control—
/.git/config✓ Not foundVersion Control—
/.svn/entries✓ Not foundVersion Control—
/.env✓ Not foundConfiguration—
/.env.local✓ Not foundConfiguration—
/.env.production✓ Not foundConfiguration—
/wp-config.php✓ Not foundConfiguration—
/.htaccess✓ Not foundConfiguration—
/phpinfo.php✓ Not foundDebug—
/server-status✓ Not foundDebug—
/server-info✓ Not foundDebug—
/.well-known/security.txt✗ ExposedSecurity PolicyInfo
/package.json✓ Not founddependency-manifest—
/composer.json✓ Not founddependency-manifest—
/Gemfile✓ Not founddependency-manifest—
/Gemfile.lock✓ Not founddependency-manifest—
/requirements.txt✓ Not founddependency-manifest—
/pom.xml✓ Not founddependency-manifest—
/.gitlab-ci.yml✓ Not foundci-config—
/.travis.yml✓ Not foundci-config—
A
Email Security
DMARC: reject, SPF: -all, DKIM
PASS
DMARC: reject, SPF: -all, DKIM
Info::
DMARC policy is reject — strongest protection
Info::
SPF ends in -all (hard fail) — strongest setting
Info::
DKIM configured (selectors: dkim, google, mandrill)
Info::
MTA-STS not configured
MTA-STS forces inbound mail to use TLS, preventing downgrade attacks. Requires both a TXT record at _mta-sts.<domain> and a policy file at https://mta-sts.<domain>/.well-known/mta-sts.txt.
Info::
TLS-RPT not configured
TLS-RPT (RFC 8460) lets MTAs report TLS-handshake failures, so you can detect and fix MTA-STS misconfigurations. Add a TXT record at _smtp._tls.<domain>.
Info::
BIMI not configured
BIMI (Brand Indicators for Message Identification) lets supporting clients (Gmail, Apple Mail, Yahoo) display your verified logo next to your messages. Optional but raises trust signals. Requires DMARC at p=quarantine or p=reject to be honored.
DMARC
Policy reject — strongest protection Record v=DMARC1; p=reject; rua=mailto:d3omt-8484@rua.dmarc.emailanalyst.com; ruf=mailto:d3omt-8484@ruf.dmarc.emailanalyst.com; fo=1

MTA-STS forces inbound mail to use TLS, preventing downgrade attacks. Requires both a TXT record at _mta-sts.<domain> and a policy file at https://mta-sts.<domain>/.well-known/mta-sts.txt.

Why this matters

Without MTA-STS, inbound mail can be silently downgraded to plain SMTP by a network attacker.

Learn more ▾

MTA-STS (RFC 8461) tells sending mail servers to use TLS and to refuse delivery if TLS fails. Requires both a TXT record at _mta-sts.<domain> AND a policy file at https://mta-sts.<domain>/.well-known/mta-sts.txt. Without it, an active attacker on the network path can strip STARTTLS and read the email in plaintext.

Source: RFC 8461

TLS-RPT (RFC 8460) lets MTAs report TLS-handshake failures, so you can detect and fix MTA-STS misconfigurations. Add a TXT record at _smtp._tls.<domain>.

Why this matters

Without TLS-RPT, you have no visibility into inbound TLS failures — MTA-STS misconfigurations stay hidden until users complain.

Learn more ▾

TLS-RPT (RFC 8460) is the feedback channel for MTA-STS: senders post aggregate reports of TLS-handshake failures to the URI in your _smtp._tls TXT record. Without it, an MTA-STS misconfiguration silently rejects mail and you find out only when someone notices missing email.

Source: RFC 8460

BIMI (Brand Indicators for Message Identification) lets supporting clients (Gmail, Apple Mail, Yahoo) display your verified logo next to your messages. Optional but raises trust signals. Requires DMARC at p=quarantine or p=reject to be honored.

Why this matters

Security gaps expose your site and users to attacks, eroding trust.

A+
API Surface
No API specs or GraphQL introspection found (probed 11 candidate path(s))
PASS
No API specs or GraphQL introspection found (probed 11 candidate path(s))
Info::
No API specs or GraphQL introspection found (probed 11 path(s))
A
Transport Security
HTTP/3, HSTS, and TLS version analysis
PASS
HTTP/3, HSTS, and TLS version analysis
Info::
HTTP/3 (QUIC) not advertised
HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
Info::
HSTS enabled (includeSubDomains)
Info::
TLS 1.3 in use (fastest handshake, 1-RTT)
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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