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x402 Facilitator Dry-Run Validator
x402
x402 Facilitator Dry-Run Validator is a paid API for AI agents from geld-machen-x402.fly.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12).
Validates an x402 payment payload against payment requirements without settling, performing a dry-run check via the facilitator
Price / call$0.05
Success—
StatusUnknown
How this service works
TIP-OF-SPEAR: URL Fingerprint ($0.01) GET ?url= → body_sha256/TLS/DNS. Phase-1 enrichment: Web Extract ($0.03) GET ?url= → Firecrawl clean markdown. DEMAND-MATCHED SERP tip: Web Search ($0.02) GET ?q= (required) → ranked results. OCR tip: Image OCR ($0.01) GET ?url= → Tesseract text (COGS=0). Builder tool: Bazaar Readiness Check — FREE ?url= indexed yes/nein + issue count; PAID report $0.05 Fix-JSON. Gated-data: Base DeFi Snapshot ($0.03) balances+gas+protocol TVL/APY. Free teasers have no live hash/results. Upsell red-flag $0.25. Ladder: 0.01→0.02→0.025→0.25→0.35→0.49→0.75→17. | tip: featured-402=https://geld-machen-x402.fly.dev/featured-402.json | first-tool=https://geld-machen-x402.fly.dev/product/bazaar-check/report.json | web-extract=https://geld-machen-x402.fly.dev/product/web-extract.json | phantom-allowlist=https://geld-machen-x402.fly.dev/product/phantom-allowlist.json | facilitator-dry-run=https://geld-machen-x402.fly.dev/product/facilitator-dry-run.json | payment-receipt-auditor=https://geld-machen-x402.fly.dev/product/payment-receipt-auditor.json
Output
Returns a validation result indicating whether the provided x402 payment payload satisfies the given payment requirements, without performing an actual settlement. Typically includes pass/fail status and any validation errors or mismatches found.
Example use cases
Pre-flight x402 payment validation
“Before I submit this x402 payment payload to buy the web-extract report, can you do a dry-run check against the listing's payment requirements to confirm it won't be rejected?”
Debugging rejected x402 payment
“My x402 payment keeps getting rejected by the facilitator — can you run a dry-run validation of this payment payload against these payment requirements so I can see what's wrong?”
Testing x402 integration in staging
“I'm building an x402 client and need to test my payment payload construction — can you do a facilitator dry-run against these payment requirements without actually settling, using the staging facilitator at https://facilitator-staging.example.com?”
Technical details
Endpoint
POSThttps://geld-machen-x402.fly.dev/product/facilitator-dry-run.json?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify that an x402 payment payload is correctly constructed and meets payment requirements before committing to a real settlement. Ideal for debugging payment integration issues, staging/testing environments, or pre-flight checks in automated payment flows where you want to catch errors before spending funds.
Side effects
- Malformed payment_payload or payment_requirements objects cause 400-level errors
- Invalid or unreachable facilitator_url override causes connection failure
- Payment payload signature verification failure returns validation failed status
- Missing required fields (payment_payload or payment_requirements) returns schema validation error
- Facilitator service downtime causes timeout or 502 errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| facilitator_url | string | Optional facilitator base URL override |
| payment_payloadrequired | object | x402 payment payload to verify (no settle) |
| payment_requirementsrequired | object | x402 payment requirements of the listing under test |
Output
Schema · Response
{}Tags
x402
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