B20 Feature Id

Last 30 days

Uptime

100%

Response time

194 ms typical, 194 ms slowest 5%

Last check

2 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/api/b20-feature-id" \
  -H "content-type: application/json" \
  -d '{"feature":"base.b20_asset"}'

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fb20-feature-id
const res = await pay("https://agent402.tools/api/b20-feature-id", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"feature":"base.b20_asset"}),
});
console.log(await res.json());

Example input

{
  "feature": "base.b20_asset"
}

Example output

{
  "calldata": "0xba87af80cdcc…",
  "feature": "base.b20_asset",
  "featureId": "0xcdcc772f…",
  "registry": "0x8453000000000000000000000000000000000001"
}

Security scan

• No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

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