x402 payee check

A data check an agent can run on an unfamiliar x402 payTo address or endpoint before it sends a payment. $0.0045 per call, paid in USDC over x402.

Descriptive data from public sources. It is not a guarantee that a payee is safe or legitimate, and it is not financial advice. Unknown is never reported as ok.

What it checks

Public sanctions lists (OFAC SDN crypto addresses)
The ScamSniffer scam address list
On-chain wallet age, activity and program status on Solana or Base
Optionally, the endpoint's unpaid 402 challenge: payTo mismatch and price outliers versus the Bazaar median

Verdicts

verdict	meaning
`ok`	No flags found in the sources checked.
`caution`	One or more soft flags, such as a new or inactive wallet or a price outlier.
`do_not_pay`	A hard flag, such as a sanctions or scam list match or a payTo mismatch.
`unknown`	Not enough data could be read to judge.

Each response also has a 0-100 score, flags with evidence, and missing_fields.

Example request

GET https://solana-wallet-intel.falcon-sol.workers.dev/payee/check?payTo=0xa30f3C68f2F6067EE5b9d5f651426E44Ea8AdAE9&network=base

Parameters: payTo (required), network (solana or base, default solana), endpoint and price (optional). An unpaid request returns HTTP 402 with payment terms. Invalid input returns 400 and is not charged. If every source is unreachable the call returns 502 and is not charged. Paid responses carry signed receipts.

For agents: x402 catalog · llms.txt · OpenAPI