Preflight
preflight402.
Call before signing a Bitcoin transaction when you need chain context for its inputs: whether each prevout exists, whether it is already spent, its value in sats and its confirmations. Resolves up to 10 inputs against a public explorer at about one request per second, so a full batch can take over 20 seconds; figures reflect chain state at checked_at. Describes on-chain facts with source links; never advises whether to sign.
Live
Last successful check: 26 Oct 2026, 00:02 UTC.
- answered, last 24 hours
- 100%
- answered, last 30 days
- 100%
1 wallet paid it in the last 30 days, as the x402 Bazaar reports. Payments
How addrbook checks →Connect
https:x402: an unpaid request gets a 402 with the price and pay-to wallet. addrbook never pays.
Who's behind it
- Listed by
- x402 Bazaarlast seen UTC
- Wallets named
- 0xb9db3966c7f18283624c97e860a84cef7f9ba607named by x402 Bazaar
- Listed since
Payments
- different wallets paid it, last 30 days
- 1
- paid calls, last 30 days
- 1
- last paid call (UTC)
As the x402 Bazaar reports, from payments Coinbase's facilitator settled. Read . addrbook has not counted these payments itself.
Its x402 endpoints have not listed a payment option addrbook could read yet.
Checks by endpoint
| Host | Protocol | State | Last checked (UTC) | Last answered (UTC) | 24 hours | 30 days | Tools |
|---|---|---|---|---|---|---|---|
| preflight402. | x402 | Live | 100% | 100% | — |
Also listed as
Other entries that share an endpoint with this one.