https://agent402.tools/api/b20-verifyGET /api/b20-verify · x402 API by Agent402
Boolean verdict with reasons: is this address a real factory-issued B20 on Base? Checks the 0xB200 address prefix, ERC-20 readability, and whether the B20 feature set is activated on the registry. ?address=0x…
What does this x402 API do?
https://agent402.tools/api/b20-verify. This is an x402-gated GET API resource from Agent402. TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-07-21. No normalized USD price is recorded; the listing names eip155:137 and eip155:143 and eip155:42161 and eip155:42220 and eip155:43114 and eip155:4663 and Base and Solana and stellar:pubnet. No settled paid call has been verified.
- Published price
- No normalized USD price is recorded
- Networks
- eip155:137 · eip155:143 · eip155:42161 · eip155:42220 · eip155:43114 · eip155:4663 · Base · Solana · stellar:pubnet
- Latest evidence
- TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-07-21
- Resource ID
- b6a39e08f7b62c54d47d3d84
Start with a quote-only recipe. Payment signing stays in your project.
const response = await fetch("https://agent402.tools/api/b20-verify", {
method: "GET",
});
console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));
// A valid 402 is a quote, not a completed paid call.This sends no payment. Inspect the 402 response before adding a wallet-enabled client.
- Live 402 quote confirmed
GET returned a protocol-valid 402 quote (402). No payment was made.
- Origin reachable
HEAD https://agent402.tools/ returned 200.
- Observed in cdp-bazaar
The registry record was observed and retained with provenance.
- Observed in 402-index
Discovered through bazaar.
What evidence supports this listing?
Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call. Read the discovery and verification methodology →
Which networks and payment options does it accept?
The normalized listing price is No normalized USD price is recorded. Raw protocol requirements remain visible below for implementation and audit use.