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URL Security Headers Checker
x402
URL Security Headers Checker is a paid API for AI agents from agent-json-reliability.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Fetches a URL and checks the HTTP security headers present in the response, reporting on header presence and compliance.
Price / call$0.003
Success—
StatusUnknown
How this service works
Deterministic JSON repair and JSON Schema validation for AI agents. Free MCP, inspect, validate, repair. Paid POST /v1/json/reliable 0.003 USDC via x402 on Base.
Output
Returns an object indicating which HTTP security headers are present or absent on the given URL, along with a success/ok status and per-header compliance details.
Example use cases
Audit a production website's headers
“Check the security headers on https://mycompany.com and let me know if we're missing anything critical like CSP, HSTS, or X-Frame-Options.”
Pre-launch security header review
“Before we go live, can you scan https://staging.myapp.io and verify it has all the recommended security headers in place?”
Compliance check for a third-party URL
“I need to verify that https://partner-api.example.com returns proper HTTP security headers — can you check what it's serving and flag any gaps?”
Technical details
Endpoint
POSThttps://agent-json-reliability.onrender.com/v1/url/security-headers?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, automated check of HTTP security headers for a specific URL — particularly useful for pre-deployment audits, compliance validation, or monitoring third-party endpoints for security posture. It is part of a broader JSON reliability and agent tooling suite, making it convenient when already using that platform.
Side effects
- URL is unreachable or returns a network error
- Invalid or malformed URL provided
- Target server blocks automated requests or returns 403
- Timeout if the remote server is slow to respond
- HTTPS certificate errors on the target URL
Output
Schema · Response
{
"example": {
"ok": true
}
}Tags
x402
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