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CAPI2 Agent Commerce – Milestone Verify
x402
CAPI2 Agent Commerce – Milestone Verify is a paid API for AI agents from capi2-agent-commerce.vandurmedries.workers.dev, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).
Evaluates a set of criteria against provided evidence to produce a pass/fail decision with a tamper-evident receipt for autonomous agent milestone verification.
Price / call$0.15
Success—
StatusUnknown
How this service works
Programmable authority checks and tamper-evident receipts for autonomous agents, sold through sustainable x402 commerce.
Output
Returns a JSON object containing a 'decision' field ('pass' or 'fail'), a boolean 'manual_review' flag indicating if human review is needed, and integer counts for 'criteria_passed' and 'criteria_failed', effectively serving as a tamper-evident receipt of the verification result.
Example use cases
Autonomous agent task gating
“Before releasing the next step to my AI agent, verify it met these 2 criteria — output must be non-empty and latency must be under 2 seconds — using the logs and output it submitted as evidence.”
Freelance deliverable acceptance
“I need to check if the 4 acceptance criteria for this contractor milestone are all satisfied based on the submitted deliverables — run the verification and tell me how many passed and whether any need manual review.”
Agent payment unlock check
“Before I authorize the x402 payment to this agent, verify the 5 completion criteria against the evidence bundle it provided and give me a tamper-evident pass or fail decision.”
Technical details
Endpoint
POSThttps://capi2-agent-commerce.vandurmedries.workers.dev/v1/milestone-verifyWhen to prefer
Choose this endpoint when you need a structured, auditable pass/fail decision over a set of criteria with evidence — especially in autonomous agent pipelines where tamper-evident receipts are required for downstream actions like releasing payments or unlocking workflow steps. It is ideal for x402 commerce flows where verifiable milestone completion is a prerequisite.
Side effects
- Empty or malformed criteria array returns a 400-level error
- Evidence array exceeding 40 items rejected
- Ambiguous or non-evaluable criteria may trigger manual_review=true instead of a clean pass/fail
- Network timeouts on the Cloudflare Workers edge layer
- Payment not fulfilled (x402) results in 402 response before verification runs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| criteria | array | |
| evidence | array |
Output
Schema · Response
{
"type": "json",
"example": {
"decision": "pass",
"manual_review": false,
"criteria_failed": 0,
"criteria_passed": 1
}
}Tags
x402
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