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AI Agent Payment Evidence Checker
x402
AI Agent Payment Evidence Checker is a paid API for AI agents from ai-agent-payment-safety-stack.onrender.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).
Verifies that an AI-agent payment produced the expected service response and returns audit evidence confirming the transaction outcome.
Price / call$0.03
Success—
StatusUnknown
How this service works
Verify that an AI-agent payment produced the expected service response and audit evidence.
Output
Returns a verification result indicating whether the AI-agent payment matched the expected service response, along with structured audit evidence that can be used for compliance, logging, or human review purposes.
Example use cases
Example prompt
“Check whether the payment my AI agent just made via x402 produced the expected service response, and give me the audit evidence — the transaction ID is txn_abc123 and the expected response was a successful data enrichment result.”
Technical details
Endpoint
POSThttps://ai-agent-payment-safety-stack.onrender.com/api/payment-evidence/checkWhen to prefer
Use this endpoint when an AI agent has autonomously made a payment via the x402 protocol and you need to programmatically verify the payment produced the expected downstream service response. Ideal for safety checks, compliance audits, or building human-in-the-loop review workflows around agent-initiated financial transactions.
Side effects
- Payment transaction ID not found or invalid — returns 404 or error indicating unknown transaction
- Expected response does not match actual response — returns mismatch result with details
- Malformed request body — returns 400 with validation error
- Service temporarily unavailable on Render infrastructure — returns 503
- Payment evidence expired or no longer retrievable — returns stale or missing evidence error
Input
{
"amount": "50.00",
"task_id": "task_qa_001",
"request_id": "req_qa_001",
"evidence_ids": [
"ev_qa_001"
],
"paid_endpoint": "https://api.example.com/service",
"payment_asset": "USD",
"payer_agent_id": "agent_qa_test_001",
"delivery_status": "completed",
"payment_reference": "pay_test_qa_001",
"transaction_reference": "txn_qa_test_001",
"actual_service_response": {
"status": "success",
"service_delivered": true
},
"expected_service_response": {
"status": "success",
"service_delivered": true
},
"service_response_received": true
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| audit_ready | boolean | |
| recommended_next_step | string | |
| requires_human_review | boolean | |
| payment_evidence_status | string | |
| payment_response_matched | boolean |
Output
{
"task_id": "task_qa_001",
"created_at": "2026-06-12T03:08:08.337914+00:00",
"request_id": "req_qa_001",
"audit_ready": true,
"missing_items": [],
"mismatch_items": [],
"recommended_next_step": "store_evidence",
"requires_human_review": false,
"payment_evidence_status": "ok",
"payment_response_matched": true,
"service_response_received": true
}Schema · Response
{
"type": "json",
"example": {
"audit_ready": true,
"recommended_next_step": "store_evidence",
"requires_human_review": false,
"payment_evidence_status": "ok",
"payment_response_matched": true
}
}Tags
x402
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