Crypto Yields

{
  "count": 1,
  "filters": {
    "chain": "base",
    "sort": "apy",
    "sustainable": true,
    "symbol": "usdc"
  },
  "pools": [
    {
      "apy": 5.12,
      "apyBase": 4.9,
      "apyMean30d": 5.03,
      "apyReward": 0.22,
      "chain": "Base",
      "exposure": "single",
      "ilRisk": "no",
      "outlier": false,
      "pool": "abc",
      "predictedClass": "Stable/Up",
      "project": "aave-v3",
      "stablecoin": true,
      "symbol": "USDC",
      "tvlUsd": 12500000
    }
  ],
  "source": {
    "name": "DefiLlama"
  },
  "totalMatching": 42
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://crypto.apitoll.cloud/v1/crypto/yields?chain=Base&sort=apy&sustainable=true&symbol=USDC'

# 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://crypto.apitoll.cloud/v1/crypto/yields?chain=Base&sort=apy&sustainable=true&symbol=USDC' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fcrypto.apitoll.cloud%2Fv1%2Fcrypto%2Fyields
const res = await pay("https://crypto.apitoll.cloud/v1/crypto/yields?chain=Base&sort=apy&sustainable=true&symbol=USDC");
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://crypto.apitoll.cloud/v1/crypto/yields?chain=Base&sort=apy&sustainable=true&symbol=USDC")
    print(res.status_code, res.text)