ToolVet
76trust / 100

Barker Defi Vaults

by Barker in Onchain & crypto

x402 APIPassing, checked 2 h ago

Query real-time stablecoin supply yield pools from Barker's index of 500+ DeFi protocols. Returns ranked rows with protocol_name, chain_name, asset_symbol, supply_apy_total (decimal — multiply by 100 for %), and supply_tvl (USD). Use for questions like 'best stablecoin yield', 'where to earn on USDC', 'compare lending rates', '稳定币利率'.

GET
https://mcp.barker.money/barker_defi_vaults
Price
$0.001
per call in USDC
Uptime
100%
last 30 days
Response time
828 ms
930 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed

How to call it

GET https://mcp.barker.money/barker_defi_vaults

Each call costs $0.001 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://mcp.barker.money/barker_defi_vaults?asset=usdc&chain=base&limit=10&sort=apy

Parameters

ParameterTypeRequiredDescription
assetstringNoStablecoin symbol (lowercase): usdt, usdc, dai, usde, usds, fdusd, gho, crvusd, pyusd, sdai, frxusd, tusd, lusd, dola, etc.
chainstringNoChain name (lowercase): ethereum, bsc, arbitrum, base, polygon, optimism, avalanche, solana, etc.
limitintegerNoRow count (default 50, max 100)
sortstringNoSort key One of: apy, tvl.

Example response

The provider's example. We can't check it without paying.

{
  "data": [
    {
      "asset_symbol": "USDC",
      "chain_name": "ethereum",
      "pool_uid": "aave-v3_ethereum_usdc_supply",
      "protocol_name": "Aave V3",
      "supply_apy_total": 0.0523,
      "supply_tvl": 1234567890
    }
  ],
  "success": true
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://mcp.barker.money/barker_defi_vaults?asset=usdc&chain=base&limit=10&sort=apy'

# 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://mcp.barker.money/barker_defi_vaults?asset=usdc&chain=base&limit=10&sort=apy' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// 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%2Fmcp.barker.money%2Fbarker_defi_vaults
const res = await pay("https://mcp.barker.money/barker_defi_vaults?asset=usdc&chain=base&limit=10&sort=apy");
console.log(res.status, await res.text());
Python: pay and call
# 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://mcp.barker.money/barker_defi_vaults?asset=usdc&chain=base&limit=10&sort=apy")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402833 ms$0.001
7 h agoPassed402836 ms$0.001
11 h agoPassed402811 ms$0.001
14 h agoPassed4021.3 s$0.001
18 h agoPassed402773 ms$0.001
Show 10 older checks
22 h agoPassed402800 ms$0.001
26 h agoPassed402799 ms$0.001
30 h agoPassed402813 ms$0.001
34 h agoPassed402918 ms$0.001
37 h agoPassed402814 ms$0.001
41 h agoPassed402772 ms$0.001
45 h agoPassed402889 ms$0.001
2 days agoPassed402758 ms$0.001
2 days agoPassed402809 ms$0.001
2 days agoPassed402893 ms$0.001