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Agent Identity Credential Acceptance and Counterparty Verification Procedure
x402
Agent Identity Credential Acceptance and Counterparty Verification Procedure is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Returns a deterministic decision procedure brief for verifying issuer-signed agent identity credentials and identity tags before an agent transacts, covering issuer trust, key binding, non-transferability, revocation, expiry, and scope binding.
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic gate for an agent presented with an issuer-signed agent identity credential or identity tag before transacting. Ordered checks: issuer trust (who signed, verification key published, issuer linked to rail or facilitator), key binding via proof of possession against the session signing key, non-transferability (no reuse across agents, resale signals forgery), revocation and expiry checked before and at settlement, scope binding (a tag asserts identity, not payment authority), and
Output
A structured JSON response containing a prose decision procedure brief ('brief') for agents outlining ordered verification steps, the topic matched, a generation source indicator (llm, reasoning, or deterministic), an ISO-8601 timestamp, service slug, and payment confirmation metadata. The 'ok' field indicates handler success.
Example use cases
Pre-transaction counterparty credential gate
“I'm about to settle a payment with another agent and they've presented an issuer-signed identity credential — give me the step-by-step procedure to verify their issuer trust chain, key binding, and check that the credential hasn't been revoked or expired before I approve the transaction.”
Detecting credential reuse and forgery signals
“An agent is presenting what looks like a reused or transferred identity tag — walk me through the non-transferability checks and forgery detection steps I should apply before accepting it as legitimate.”
Scope binding check for identity vs payment authority
“I received an agent identity tag but I'm not sure if it also grants payment authority — can you run me through the scope binding verification procedure to confirm whether this tag is valid for identity only or whether it extends to payment authorization?”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/agent-identity-credential-acceptance-and-counterWhen to prefer
Choose this endpoint when an agent needs a structured, paid-grade decision procedure for evaluating agent identity credentials or identity tags in the context of x402 payments or agentic transactions — specifically when you need coverage of issuer trust, key binding, non-transferability, revocation, expiry, and scope binding in a single authoritative brief. Prefer it over general identity libraries when operating in agentic payment rails where credential forgery, reuse, or scope overreach are live risks.
Side effects
- Missing or malformed 'input' object returns a schema validation error
- Invalid method enum value (e.g. POST) results in rejection
- Expired or invalid x402 payment header causes 402 response requiring fresh payment
- Topic override not matching any known procedure may return a generic or degraded brief
- LLM or reasoning backend unavailability may delay or fail generation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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