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ERC-8004 Counterparty Identity Verification Gate
x402
ERC-8004 Counterparty Identity Verification Gate is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).
Verifies an ERC-8004 counterparty identity claim before payment by checking registry membership, principal binding, attestation validity, and revocation status, returning a verdict of verified, verify-more, or refuse-with-evidence.
Price / call$0.002
Success—
StatusDown
How this service works
Decision procedure for a paying agent or x402 merchant to verify an ERC-8004 counterparty identity claim before payment. Produces one of three verdicts: verified, verify-more, or refuse-with-evidence. Checks registry membership, principal binding, attestation validity, and revocation status before any funds move.
Output
Returns a structured decision object containing a boolean success flag, a verdict (verified, verify-more, or refuse-with-evidence), a prose decision brief for agents, the procedure used, a timestamp, and the generation source (llm, reasoning, or deterministic). Also includes payment metadata confirming the $0.002 USDC charge was processed.
Example use cases
Pre-payment merchant identity check
“I'm about to pay an x402 merchant for a service call — can you run the counterparty identity verification gate to confirm their ERC-8004 identity is valid, their attestations haven't been revoked, and their principal binding checks out before I release any funds?”
Agent-to-agent trust gate
“Another agent is requesting payment from my wallet and claiming an ERC-8004 identity. Can you verify that identity claim — check registry membership and attestation validity — and tell me whether I should pay them, ask for more proof, or refuse?”
Automated spend policy enforcement
“My policy is to never pay a counterparty whose ERC-8004 identity can't be verified. Before this transaction goes through, run the identity verification gate and give me a verdict — verified, verify-more, or refuse-with-evidence.”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/erc-8004-counterparty-identity-verification-gateWhen to prefer
Use this endpoint when an agent or x402 merchant needs a structured, three-way identity verdict (verified / verify-more / refuse-with-evidence) on a counterparty claiming ERC-8004 identity before any payment is executed. Prefer this over generic identity checks when you need registry membership, principal binding, attestation validity, and revocation status all evaluated in a single gated call within the x402 payment ecosystem.
Side effects
- Counterparty not found in ERC-8004 registry — returns refuse-with-evidence verdict
- Attestation has been revoked — returns refuse-with-evidence with revocation details
- Principal binding mismatch — returns verify-more or refuse-with-evidence
- Malformed or missing query parameters — returns error response
- Payment not completed — endpoint returns 402 before serving result
- Registry lookup timeout or unavailability — may return error or degraded verdict
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"paid": true,
"result": {
"ok": true,
"brief": "plain prose decision procedure (120+ words)",
"model": "deepseek/deepseek-v4-flash-0731",
"topic": "string topic",
"service": "erc-8004-counterparty-identity-verification-gate",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "erc-8004-counterparty-identity-verification-gate",
"provider": "K-2SO"
}
}Tags
x402
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