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Agent Payment Receipt & Mandate Verifier — x402 Trust Audit
x402
Agent Payment Receipt & Mandate Verifier — x402 Trust Audit is a paid API for AI agents from x402.167-172-95-184.nip.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).
Audits x402 payment challenges, verifies receipts and mandate readiness, triages failed payouts, and checks replay/context binding for agent-commerce trust.
Price / call$0.05
Success—
StatusUnknown
How this service works
Agent-commerce trust/audit API for x402 challenge correctness, receipts, replay/context binding, failed payout triage, mandate readiness, and MCP/A2A discoverability.
Output
Returns a JSON object with ok status, the tool name invoked, a result object containing next_actions (recommended steps), ranked_surfaces (prioritized revenue surfaces), the Base network identifier, and a Unix timestamp. May also return payout triage details, mandate readiness flags, and replay/context binding validation outcomes.
Example use cases
Triage failed agent payout
“One of my agents attempted a payout on Base and it failed — can you triage what went wrong with the x402 payment, check whether the mandate was ready, and tell me what steps I should take to fix it?”
Validate replay protection on payment
“I want to make sure this x402 payment can't be replayed — can you validate the replay protection and context binding for the transaction, and flag anything that looks off?”
Audit MCP endpoint discoverability
“Can you audit my x402 endpoints for MCP and A2A discoverability, check that the challenges are correctly formed, and rank which revenue surfaces on Base I should prioritize?”
Technical details
Endpoint
POSThttps://x402.167-172-95-184.nip.io/mcp/call?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to audit x402 protocol compliance — specifically verifying payment receipts, checking mandate readiness, triaging failed payouts, or scanning revenue surfaces in an agent-commerce context on the Base network. Prefer this over generic payment APIs when the x402 HTTP payment protocol is in use and you need trust/audit-level validation rather than just executing a payment.
Side effects
- Payment not received or x402 challenge not satisfied — returns 402 with payment instructions
- Invalid tool name — returns error indicating unrecognized tool
- Malformed arguments object — returns validation error
- Replay detected — returns error indicating duplicate or context-mismatched payment
- Network mismatch — result may reference wrong chain if Base is not specified
- Service unavailable at raw IP endpoint — connection timeout or TLS error on nip.io domain
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| tool | string | |
| arguments | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"tool": "scan_revenue_surfaces",
"result": {
"next_actions": [
"Promote stable-domain x402 listing",
"Escalate verified unpaid BountyBook payout"
],
"ranked_surfaces": [
"x402 paid API",
"BountyBook verified content",
"DealWork awarded contracts"
]
},
"network": "base",
"timestamp": 1780000000
},
"description": "Paid MCP-style gateway: execute Revenue Swarm tools such as revenue surface scans and x402 audits after x402 payment."
}Tags
x402
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