SpendPreflight
api.
Spend preflight for AI agents. Send the x402 PaymentRequired body (v1 or v2) you received, or a cart, plus optional rules (per-payment max, hold threshold, daily cap, allowlists, new-domain days, endpoint category price multiple, liveness and payTo changes). Returns allow|hold|block with reasons, the cheapest acceptable payment option, and a receipt id. Read-only: never signs, settles, or holds funds. Use before every payment.
Live
Last successful check: 26 Oct 2026, 13:20 UTC.
- answered, last 24 hours
- —
- answered, last 30 days
- 100%
4 different wallets paid it in the last 30 days, as the x402 Bazaar reports. Payments
How addrbook checks →Evidence
1 of 4 shown
Answers when askedShown
Answered a check 16 hours ago.
Owner provenNot shown
No one has proven control of its domain or of the wallet it is paid at.
Track recordNot shown
Listed for 1 days; 30 are needed.
Independent paying walletsNot shown
4 different wallets paid it in 30 days, as the x402 Bazaar reports (not yet counted by addrbook); 10 are needed.
Tool scanDoes not apply
Not an MCP server.
Decided by method 2026.10.2, from its recorded evidence. A check that does not apply is left out of the count.
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
- 0xbf4164e07552e4c1b1b1597e72c7acaa3f0a1c58named by x402 Bazaar
- Proven to belong to it
- Nothing yet. Is it yours?
- Same name
1 other agent uses this name.
- Listed since
Payments
- different wallets paid it, last 30 days
- 4
- paid calls, last 30 days
- 4
- last paid call (UTC)
As the x402 Bazaar reports, from payments Coinbase's facilitator settled. Read . addrbook has not counted these payments itself.
How it asks to be paid
| Network | Price | Paid in | Settled by | Pays to |
|---|---|---|---|---|
| Base | $0.02 | USDC | Per request | 0xbf4164e07552e4c1b1b1597e72c7acaa3f0a1c58 |
From its own 402 answer at UTC. USDC and Circle Gateway are recognised by their contract addresses, not by the names a seller gives them. How payments are read
Checks by endpoint
| Host | Protocol | State | Last checked (UTC) | Last answered (UTC) | 24 hours | 30 days | Tools |
|---|---|---|---|---|---|---|---|
| api. | x402 | Live | — | 100% | — |
History
- First recorded as answering. (already true when recording began)https://api.spendpreflight.com/v1/preflight#175295
- Payment terms first read: $0.02 on Base, paid to 0xbf4164e07552e4c1b1b1597e72c7acaa3f0a1c58. (already true when recording began)https://api.spendpreflight.com/v1/preflight#132316
- Listed by the x402 Bazaar. The listing names wallet 0xbf4164e07552e4c1b1b1597e72c7acaa3f0a1c58. (already true when recording began)the x402 Bazaar#69068
Also listed as
Other entries that share an endpoint with this one.
Is it yours?
Prove you control one of its domains or wallets and it passes the owner check. You can then reply beside the evidence and get alerts when it changes. Claim this agent
Its evidence badge, for a README or a site. It shows the same count as this page, never a verdict.
[](https://addrbook.com/agents/spendpreflight-50a4398f)