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SignalHarness HTTP Header Audit
x402
SignalHarness HTTP Header Audit is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Analyzes HTTP response headers from a URL for security, caching, and discovery best practices, returning categorized findings and pass/fail results.
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
A structured JSON result with an overall pass/fail status, categorized findings broken into security, caching, and discovery summaries (each listing present and missing headers), a list of normalized headers, and a replay flag. Also includes a signed receipt with payment and execution metadata.
Example use cases
Security header compliance check
“Audit the HTTP headers for https://myapp.com — the server returned a 200 with headers: [['content-type','application/json'],['x-content-type-options','nosniff']] — tell me which important security headers like CSP, HSTS, or X-Frame-Options are missing.”
API gateway cache header review
“I want to check whether my API at https://api.myservice.com is returning the right caching headers. It comes back with a 200 and these headers: [['cache-control','public, max-age=3600'],['etag','"abc123"']] — flag anything that looks wrong or missing.”
Pre-launch web security audit
“Before we launch, can you run an HTTP header audit on https://staging.myproduct.io — it returns a 200 with headers [['strict-transport-security','max-age=31536000'],['content-security-policy','default-src self'],['x-frame-options','SAMEORIGIN']] — and tell me if we're passing or if anything needs to be fixed?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/http_header_audit/invokeWhen to prefer
Choose this endpoint when you need a structured, machine-readable audit of HTTP response headers — especially for security posture checks (CSP, HSTS, X-Frame-Options), cache configuration validation, or pre-launch compliance reviews. It's ideal for AI agents that have already fetched HTTP headers from a target URL and need to classify and score them without writing custom header-checking logic. Prefer it over generic HTTP inspection tools when you need categorized findings (security/cache/discovery) and a clear pass/fail verdict at $0.01 per call.
Side effects
- Invalid or non-HTTPS URL returns schema validation error
- Headers array malformed or exceeds 128 entries causes rejection
- Status code outside 100–599 range is rejected
- Unreachable or rate-limited upstream service may return an error status
- Missing required 'headers' field causes bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| status | integer | |
| headers | array |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"result": "pass",
"status": 0,
"findings": [
{
"code": "duplicate_header",
"header": "example",
"severity": "info"
}
],
"sourceUrl": "example",
"cacheSummary": {
"missing": [
"example"
],
"present": [
"example"
]
},
"securitySummary": {
"missing": [
"example"
],
"present": [
"example"
]
},
"discoverySummary": {
"missing": [
"example"
],
"present": [
"example"
]
},
"normalizedHeaders": [
{
"name": "example",
"values": [
"example"
]
}
]
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "http_header_audit",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "2e6f0112ecd6a6aa620f18b3534e611c60f827bcd353b606f3640d5d1dbfc6f7",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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