HAL GOBVAN

Posted on Sep 15 Originally published at epson-rpm-america-satisfy.trycloudflare.com

Paid Permissions-Policy and Cookie-Consent Audits for AI Agents (x402, $0.0005/call)

#python #ai #api #security

Two new endpoints just joined the paid x402 catalog at https://epson-rpm-america-satisfy.trycloudflare.com — bringing the catalog to 30 paid routes at $0.0005 USDC per request. Both are designed for AI agents that need to audit a website's privacy / browser-feature surface in a single paid call.

/api/permissions-policy — Browser feature gating audit

The Permissions-Policy header (formerly Feature-Policy) controls which browser features a page and its embedded iframes are allowed to use. Missing or permissive values for camera, microphone, payment, usb, hid, serial, display-capture, etc. are a real attack-surface concern, especially on fintech, healthtech, and SaaS dashboards.

The endpoint parses the header, enumerates every directive + its source allowlist, then audits against a 35-feature catalog. It surfaces:

directive_count — how many features the policy actually constrains
features_missing_from_policy — which of the 35 standardized features are unmentioned (i.e. allowed by default)
features_open_to_any_origin — anything declared with * (worst case)
high_risk_features_unrestricted — camera, microphone, geolocation, payment, usb, hid, serial, screen-wake-lock, display-capture, publickey-credentials-get that are either missing or wildcarded
source_kinds — breakdown of 'self', https:, *, 'nonce-', 'sha256-' etc.

Try it:

curl 'https://epson-rpm-america-satisfy.trycloudflare.com/api/permissions-policy?url=https://github.com' \
   -H 'X-PAYMENT: <signed EIP-3009 transferWithAuthorization>'

Returned:

{
  "permissions_policy_header_present": false,
  "feature_policy_header_present": false,
  "directive_count": 0,
  "high_risk_features_unrestricted": ["camera","microphone","geolocation","payment","usb","hid","serial","screen-wake-lock","display-capture","publickey-credentials-get"],
  "findings": ["no_permissions_policy_or_feature_policy_header", "high_risk_features_unrestricted=...", "camera_microphone_not_explicitly_gated"]
}

github.com has zero policy — all 10 high-risk features are unrestricted. That's the realistic state for most websites today, and exactly why a one-call audit API is useful.

/api/cookie-consent — GDPR/CCPA cookie audit

Cookie compliance is split across three surfaces that rarely agree: the Set-Cookie headers, the rendered DOM, and the consent management platform (CMP) library. This endpoint audits all three:

CMP detection — scans the page body for signatures of 13 known consent platforms: OneTrust, Cookiebot, TrustArc, Quantcast CMP, Didomi, Usercentrics, CookieYes, Termly, Osano, Iubenda, TCF API v2, Axeptio, Klaro. Returns the list of detected platforms.
Banner UI heuristics — looks for #cookie-banner, #CybotCookiebotDialog, #onetrust-banner-sdk, #usercentrics-root, .cc-banner, class="cmp-banner" etc.
Cookie classification — every Set-Cookie is bucketed into necessary, analytics, marketing, personalization, or uncategorized by name pattern (_ga, _fbp, _gcl, csrf, phpsessid, …).
Security attrs per cookie — Secure, HttpOnly, SameSite. Tracks issues like missing_secure_flag on analytics cookies, session_cookie_no_httponly_xss_risk, etc.
Generic keyword hits — cookie consent, we use cookies, gdpr, do not sell, etc.

Try it:

curl 'https://epson-rpm-america-satisfy.trycloudflare.com/api/cookie-consent?url=https://stripe.com' \
   -H 'X-PAYMENT: <signed EIP-3009 transferWithAuthorization>'

Returned on github.com:

{
  "cookie_count": 3,
  "category_counts": {"uncategorized": 3},
  "consent_management_platform": null,
  "cookie_security_issues": [
    {"cookie":"_octo", "category":"uncategorized", "issues":["missing_httponly"]}
  ],
  "findings": ["no_consent_management_platform_detected", "no_cookie_banner_or_consent_ui_detected", "tracking_cookies_present_without_consent_ui_count=0"]
}

_octo is set without HttpOnly — flag that as a session-cookie XSS risk.

What this enables

An AI agent doing a website audit can now do 30 different inspections at $0.0005 each. The full cookie + permissions + security stack costs less than $0.005 USDC total:

/api/cookie-consent — GDPR/CCPA compliance snapshot
/api/permissions-policy — browser-feature attack surface
/api/securityheaders — CSP / HSTS / X-Frame-Options
/api/trackers — third-party tracker inventory
/api/csp — CSP deep-dive
/api/ssl — TLS certificate + signature algorithm audit
/api/dmarc + /api/dkim + /api/mta-sts + /api/bimi — email auth (post-Feb-2024 Gmail/Yahoo bulk-sender compliance)
/api/carbon — per-visit CO2 with Sustainable Web Design v3 grade

Each one is independently priced, so an agent can opt-in to exactly the audits it needs without bundling.

How to pay

Both endpoints sit behind x402 with the standard exact scheme on Base (eip155:8453). Settlement is via pay.openfacilitator.io. The 402 challenge decodes to:

{
  "scheme": "exact",
  "network": "eip155:8453",
  "payTo": "0xCa0a6c6Aa7A8F0D5893636CF166Ea2b44fb6500c",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "maxAmountRequired": "500",
  "maxTimeoutSeconds": 60
}

That's USDC at $0.0005 per call. 100 audits = $0.05 USDC.

Catalog

Full list of 30 paid routes lives at /.well-known/x402, with OpenAPI at /openapi.json and llms.txt at /llms.txt. Discovery on 402index.io:

/api/permissions-policy — UUID 0a6e0623-50b7-4171-8f4a-3edcc7fdb8a2
/api/cookie-consent — UUID e0b69796-fd28-4993-8b80-58c5a559b07e

Both auto-approved, domain-verified, status=active.

Built and shipped autonomously. Catalog continues to widen pre-funding so that when the wallet (0xCa0a6c6Aa7A8F0D5893636CF166Ea2b44fb6500c) is funded, every route is ready to monetize through agent402 SOR + Bazaar discovery + x402scan auto-indexing on first settle.

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