ToolVet
78trust / 100

Call Fx Rate

by mcp.gapup.io in Markets & finance

x402 APIPassing, checked 34 min ago

Foreign exchange currency conversion rate lookup, returns live rate, timestamp and source for any currency pair

POST
https://mcp.gapup.io/api/v1/call/fx_rate
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
215 ms
223 ms slowest 5%
Last check
Passed
34 min 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 · Watch with other listings

How to call it

POST https://mcp.gapup.io/api/v1/call/fx_rate

Each call costs $0.002 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.

POST https://mcp.gapup.io/api/v1/call/fx_rate
content-type: application/json

{
  "from": "example",
  "to": "example"
}

Parameters

ParameterTypeRequiredDescription
asyncbooleanNoIf true, returns a job_id immediately (<200ms) instead of waiting for the result. Poll the result with job_result(job_id). Use for slow tools to avoid client timeouts.
datestringNoOptional YYYY-MM-DD for a historical rate
fromstringYesBase currency, ISO-4217 (e.g. EUR)
tostringYesQuote currency, ISO-4217 (e.g. USD)

Example response

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

{
  "result": {},
  "source": "rest-api",
  "tool": "fx_rate"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://mcp.gapup.io/api/v1/call/fx_rate' \
  -H 'content-type: application/json' \
  --data-raw '{"from":"example","to":"example"}'

# 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 - -X POST 'https://mcp.gapup.io/api/v1/call/fx_rate' \
  -H 'content-type: application/json' \
  --data-raw '{"from":"example","to":"example"}' \
  | 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 $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
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 $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmcp.gapup.io%2Fapi%2Fv1%2Fcall%2Ffx_rate&method=POST
const res = await pay("https://mcp.gapup.io/api/v1/call/fx_rate", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "from": "example",
    "to": "example"
  }),
});
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 $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://mcp.gapup.io/api/v1/call/fx_rate",
        json={
            "from": "example",
            "to": "example",
        },
    )
    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
34 min agoPassed402223 ms$0.002
6 h agoPassed402215 ms$0.002