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Synthex Forge Output Verification
x402
Synthex Forge Output Verification is a paid API for AI agents from x402.synthexforge.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-21).
Verifies an AI-generated output against a declared schema, claimed value, and accuracy budget, returning an Ed25519-signed attestation artifact on Base mainnet via x402 micropayment.
Price / call$0.5
Success—
StatusUnknown
How this service works
Synthex Forge x402 Receive: 41 paid verification, attestation and governance endpoints (Ed25519 + SHA-256 signed artifacts) plus free verify/public-key/standard sibling routes. Paid routes answer HTTP 402 with an x402 v2 `payment-required` envelope (atomic USDC on Base mainnet, chain ID 8453). Free routes are declared with `security: []` per the x402scan discovery spec.
Output
A cryptographically signed verification response containing an Ed25519-signed, SHA-256-hashed attestation artifact indicating whether the output passed all declared checks (schema conformance, claimed value accuracy, staleness budget). The artifact is anchored to Base mainnet (chain ID 8453) via an x402 v2 micropayment of $0.50 USDC and is suitable for governance and compliance workflows.
Example use cases
AI output compliance attestation
“Verify that this model-generated contract summary matches the declared schema, confirm the claimed extraction accuracy is above 90%, and return a signed attestation I can attach to the audit trail — subject is 'contract-parser-v2', staleness budget 1800 seconds.”
Real-time data freshness check
“Check whether this AI output about live market prices is still within its 300-second staleness budget and validate it against the declared schema — I need a cryptographically signed artifact confirming it's still valid.”
Governance review of model outputs
“Run the full suite of checks on this AI-generated medical report, verify the output against the declared schema and claimed values, and give me an Ed25519-signed governance artifact for our compliance team — subject is 'patient-risk-score', accuracy threshold 0.95.”
Technical details
Endpoint
POSThttps://x402.synthexforge.com/v1/output/verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cryptographically verifiable, signed attestation that an AI-generated output conforms to a declared schema and claimed values — especially for governance, compliance, or audit trails. It is uniquely suited for workflows requiring on-chain-anchored artifacts (Base mainnet) with staleness and accuracy budget enforcement. Prefer it over generic validation services when you need Ed25519-signed, SHA-256-hashed proof suitable for downstream verification pipelines.
Side effects
- 402 Payment Required — x402 payment envelope must be resolved before the endpoint returns a result
- Output fails schema validation — mismatch between output content and declared schema returns a failed attestation
- Staleness budget exceeded — output timestamp is older than stalenessBudgetSeconds, returns a freshness failure
- Claimed value mismatch — accuracy checks reveal the claimed value diverges beyond the accuracy threshold
- Invalid input format — missing required fields such as output or schema returns a 400 error
- Ed25519 signing failure — internal key management issue prevents artifact generation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| checks | string | |
| output | string | |
| schema | string | |
| claimed | string | |
| subject | string | |
| accuracy | string | |
| stalenessBudgetSeconds | string |
Output
Schema · Response
{}Tags
x402
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