Registry Agents

{
  "agents": [
    {
      "acceptsX402": true,
      "agentId": "7",
      "checkedAt": 1791075655,
      "declares": {
        "endpoint": "https://summarizepro.example.com/a2a",
        "name": "Summarize Pro",
        "skills": [
          "natural-language-processing-info",
          "summarization"
        ]
      },
      "fundingCluster": {
        "cluster": "fund:0xb564d436a6a82c692a02321063a2bab8959db802",
        "size": 2
      },
      "payoutWallet": "0xf4b315f15be6093693745489f06a9b30bb32bebd"
    },
    {
      "acceptsX402": true,
      "agentId": "12",
      "checkedAt": 1791075655,
      "declares": {
        "endpoint": "https://docbrief.example.com/a2a",
        "name": "DocBrief",
        "skills": [
          "natural-language-processing-info",
          "summarization"
        ]
      },
      "fundingCluster": {
        "cluster": "fund:0xb564d436a6a82c692a02321063a2bab8959db802",
        "size": 2
      },
      "payoutWallet": "0x51060345aad1aef23d92b11fb630ab535083dea6"
    }
  ],
  "count": 2,
  "degraded": false,
  "example": true,
  "filter": {
    "acceptsX402": true,
    "quality": "valid_with_service"
  },
  "nextCursor": null
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://trust-agent.io/v1/registry/agents?acceptsX402=true&quality=valid_with_service'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://trust-agent.io/v1/registry/agents?acceptsX402=true&quality=valid_with_service' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.010001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.010001" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.010001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftrust-agent.io%2Fv1%2Fregistry%2Fagents
const res = await pay("https://trust-agent.io/v1/registry/agents?acceptsX402=true&quality=valid_with_service");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.010001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.010001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://trust-agent.io/v1/registry/agents?acceptsX402=true&quality=valid_with_service")
    print(res.status_code, res.text)