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CAPI2 Momentum Foundry – API Contract Audit
x402
CAPI2 Momentum Foundry – API Contract Audit is a paid API for AI agents from capi2-foundry.vandurmedries.workers.dev, paid per call via x402, $0.013/call, status unknown (last checked 2026-10-11).
Audits a parsed OpenAPI JSON object and returns a structured analysis of the API contract, delivered after x402 micropayment settlement.
Price / call$0.013
Success—
StatusUnknown
How this service works
Paid agent utilities delivered after verified x402 settlement.
Output
A JSON object containing the audit result (structured findings about the API contract), the product ID ('api-contract-audit'), a creation timestamp, and a signed delivery receipt that includes the payer address, receipt ID, delivery timestamp, input and result SHA-256 hashes, and the atomic USDC amount charged — providing a verifiable proof of delivery.
Example use cases
Pre-publish API spec review
“Before I publish my new payments API, can you run a contract audit on this OpenAPI JSON and tell me what's wrong or could be improved?”
Catch breaking changes in API upgrade
“I've updated my OpenAPI spec for v2 of my service — can you audit the contract and highlight any issues that might break existing integrations?”
Security and compliance spot-check
“Can you audit this OpenAPI definition for any obvious security gaps or missing fields that would fail a compliance review?”
Technical details
Endpoint
POSThttps://capi2-foundry.vandurmedries.workers.dev/v1/products/api-contract-audit/run?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a programmatic, paid-on-demand audit of an OpenAPI contract without providing a URL — you supply the already-parsed JSON object directly. It is best suited for CI/CD pipelines, agent workflows, or developer tools that already have the spec in memory and want a verified, receipt-backed audit result with cryptographic proof of delivery via x402.
Side effects
- Invalid or malformed OpenAPI JSON object causes audit failure or error result
- Payment not settled via x402 results in 402 response and no audit delivered
- OpenAPI object contains unresolvable $ref cycles or unsupported spec versions
- Network timeout or worker error returns 5xx with no delivery receipt
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| openapi | object | Parsed OpenAPI JSON object; no URL fetching |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {},
"createdAt": "2026-09-23T00:00:00.000Z",
"productId": "api-contract-audit",
"deliveryReceipt": {
"payer": "0x0000000000000000000000000000000000000000",
"productId": "api-contract-audit",
"receiptId": "00000000-0000-4000-8000-000000000000",
"deliveredAt": "2026-09-23T00:00:00.000Z",
"inputSha256": "example-input-sha256",
"amountAtomic": "13000",
"resultSha256": "example-result-sha256",
"signatureSha256": "example-signature-sha256"
}
}
}Tags
x402
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