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Horizon Pulse Seller Due-Diligence for x402 Endpoints
x402
Horizon Pulse Seller Due-Diligence for x402 Endpoints is a paid API for AI agents from horizonpulse.dev, paid per call via x402, $5/call, status unknown (last checked 2026-10-30).
Runs a 5-check due-diligence audit on a single x402 endpoint — including a real capped test payment — and returns a signed JSON verdict of evidenced facts about the seller.
Price / call$5
Success—
StatusUnknown
How this service works
Seller due-diligence for one x402 endpoint. We make a real capped test payment, check the paid response against the listed schema, compare payTo with the CDP listing, read a recent window of on-chain USDC payments to the payTo and screen for lookalike addresses. Returns a signed JSON verdict of evidenced facts. No charge unless the test payment and all 4 other checks complete. Facts, not endorsement; no warranty. Not affiliated with the seller checked. $5.
Output
A signed JSON verdict containing evidenced facts from five checks: (1) result of a real capped test payment, (2) comparison of the paid response against the endpoint's declared schema, (3) comparison of the payTo address with the CDP Bazaar listing, (4) a recent window of on-chain USDC payment history to the payTo, and (5) lookalike address screening results. The verdict is cryptographically signed and states facts without warranty or endorsement.
Example use cases
Pre-integration x402 fraud screen
“I'm about to pay for and integrate the x402 endpoint at https://market.someapi.dev/premium — can you run a due-diligence check on it, confirm the payTo address is 0x1234abcd5678ef00, and tell me if anything looks sketchy before I commit?”
Verifying a newly listed Bazaar seller
“There's a new x402 seller listed on Bazaar at https://newprovider.xyz/api/feed — can you do a full seller audit on them, including checking on-chain USDC payments and screening for lookalike addresses?”
Automated x402 vendor vetting pipeline
“Before my agent fleet starts using https://databroker.io/x402/prices, run the seller due-diligence check on it and flag me if the payTo address doesn't match what's in the CDP listing or if there are any lookalike address warnings.”
Technical details
Endpoint
POSThttps://horizonpulse.dev/api/seller-dd/single?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need cryptographically evidenced, multi-factor due diligence on an x402 endpoint before integrating or paying it — especially when you want to screen for lookalike wallet address fraud, validate schema compliance with an actual test payment, or cross-reference the payTo with Coinbase CDP Bazaar. Prefer this over manual inspection or single-factor checks when the stakes of integrating a fraudulent or misconfigured x402 seller are meaningful.
Side effects
- Test payment fails — charge not incurred, no verdict returned
- Endpoint URL is unreachable or returns non-x402 response — validation cannot proceed
- payTo address in endpoint response is missing or malformed — schema check fails
- CDP Bazaar lookup returns no listing for the seller — comparison step incomplete
- On-chain data unavailable for the payTo address — USDC history check skipped
- All 5 checks must complete for billing to occur — partial runs are not charged
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| resource | string | https URL of the x402 endpoint to check (required). |
| expected_payTo | — | Optional EVM address to compare with the endpoint's payTo. |
Tags
x402
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