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Witnessory Post-Quantum TLS/SSH Domain Check
x402
Witnessory Post-Quantum TLS/SSH Domain Check is a paid API for AI agents from api.witnessory.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).
Returns a cryptographically signed attestation of whether a specific domain supports post-quantum key exchange in TLS and SSH
Price / call$0.01
Success—
StatusUnknown
How this service works
58.4% of the top 10,000 sites negotiate post-quantum TLS; 52.3% of SSH servers offer post-quantum key exchange. As of 2026-10-27, from 4 probes; signed readings, recomputable.
Output
A JSON object containing: a 'record' with the domain, readiness level (e.g. 'ready'), and UTC timestamp of the check; a human-readable 'summary' describing the negotiated post-quantum algorithm (e.g. X25519MLKEM768 with TLS 1.3); and 'signatures' with both ed25519 and MLDSA65 cryptographic signatures over the result, making the attestation independently verifiable and recomputable.
Example use cases
Vendor security due diligence check
“Before we integrate with payments.acme.com, can you check whether they support post-quantum TLS and give me a signed attestation I can attach to the security review?”
Verify own site's quantum readiness
“We just updated our TLS config on mybankingapp.com — can you get a signed proof that it now negotiates post-quantum key exchange so I can show compliance?”
Benchmark competitor's crypto posture
“Can you check whether competitor.io has post-quantum TLS enabled yet? I want to compare their quantum-readiness level against ours.”
Technical details
Endpoint
GEThttps://api.witnessory.org/pay/check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cryptographically signed, independently verifiable attestation of a domain's post-quantum TLS or SSH status — not just a raw TLS handshake inspection. It is ideal for compliance evidence, vendor audits, or any workflow requiring tamper-evident proof signed with both classical (ed25519) and post-quantum (MLDSA65) algorithms. Prefer it over generic TLS scanners when auditability and signature provenance matter.
Side effects
- Domain does not support post-quantum key exchange — returns a lower readiness level rather than error
- Network unreachable or domain does not exist — may return an error or failed probe status
- Payment not provided or insufficient — HTTP 402 response before any domain check is performed
- Rate limiting or probe unavailability — transient failures across probe nodes
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"record": {
"level": "ready",
"domain": "example.org",
"checked_utc": "2026-10-21T10:00:00Z"
},
"summary": "example.org: a current browser gets post-quantum key exchange (X25519MLKEM768, TLS 1.3)",
"signatures": {
"ed25519": "...",
"mldsa65": "..."
}
}
}Tags
x402
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