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Relaystation PDF Signature Verifier
x402
Relaystation PDF Signature Verifier is a paid API for AI agents from api.relaystation.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Verifies a PDF's digital signatures with structural and digest checks, returning results as JSON
Price / call$0.01
Success—
StatusUnknown
How this service works
$0.001/call. Verify a PDF's digital signatures — structural + digest checks, results as JSON. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny
Output
A JSON object containing the results of digital signature verification for the submitted PDF, including structural validity checks, cryptographic digest verification, signer identity information, certificate status, and an overall validity verdict for each signature found in the document.
Example use cases
Contract authenticity check before countersigning
“Before I countersign this vendor agreement, can you verify that all digital signatures on the attached PDF are cryptographically valid and the document hasn't been altered since it was signed?”
Compliance audit of signed regulatory filings
“I need to confirm that the signed PDF submission we received from our compliance team has valid digital signatures — check the structural and digest integrity and report back with any issues.”
Detecting tampered signed documents in onboarding
“We just received a signed identity document PDF from a new user during onboarding — can you verify its digital signatures are legitimate and haven't been forged or broken?”
Technical details
Endpoint
POSThttps://api.relaystation.ai/v1/pdf/verify-signaturesWhen to prefer
Choose this endpoint when you need programmatic, per-call PDF signature verification at very low cost ($0.001/call) without managing your own cryptographic infrastructure. Ideal for agents that need to validate signed documents as part of onboarding, compliance, or contract workflows. Prefer this over general-purpose document APIs when the specific requirement is digital signature integrity checking with structured JSON output.
Side effects
- PDF has no digital signatures — returns empty or zero-signature result
- PDF is corrupted or malformed — parsing error returned
- URL to PDF is inaccessible or returns non-PDF content
- Signature uses an unsupported or proprietary signature format
- Certificate chain cannot be resolved — indeterminate validity
- Payment not included or insufficient — x402 payment required error
- Request times out for very large PDFs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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