ToolVet
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Boj Rates

by api.agentfeeds.jp in Markets & finance

x402 APIPassing, checked 2 h ago

Historical and current Japanese interest-rate series from the Bank of Japan's official Time-Series Data Search Site: the unsecured overnight call rate (proxy for the BOJ policy rate operating target, daily since 1998) and the basic discount/loan rate (formerly 公定歩合, daily since 1882). Factual published data only; not investment advice or a rate forecast.

GET
https://api.agentfeeds.jp/v1/boj/rates
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
875 ms
1.4 s 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 · Watch with other listings

How to call it

GET https://api.agentfeeds.jp/v1/boj/rates

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.

GET https://api.agentfeeds.jp/v1/boj/rates?limit=10&series=call_rate_on

Parameters

ParameterTypeRequiredDescription
endstringNooptional end period, YYYYMM
limitintegerNo1-2000, default 100 (most recent observations)
seriesstringYescall_rate_on = unsecured overnight call rate (policy-rate proxy); discount_rate = basic discount/loan rate One of: call_rate_on, discount_rate.
startstringNooptional start period, YYYYMM

Example response

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

{
  "data": {
    "count": 1,
    "last_update": "2026-07-22",
    "points": [
      {
        "date": "2026-07-21",
        "value": 0.478
      }
    ],
    "series": "call_rate_on",
    "series_name": "無担保コールＯ／Ｎ物レート／平均値 日次／金利",
    "unit": "年％"
  },
  "kind": "factual_data",
  "product": "boj.rates"
}

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 'https://api.agentfeeds.jp/v1/boj/rates?limit=10&series=call_rate_on'

# 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://api.agentfeeds.jp/v1/boj/rates?limit=10&series=call_rate_on' \
  | 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%2Fapi.agentfeeds.jp%2Fv1%2Fboj%2Frates
const res = await pay("https://api.agentfeeds.jp/v1/boj/rates?limit=10&series=call_rate_on");
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.get("https://api.agentfeeds.jp/v1/boj/rates?limit=10&series=call_rate_on")
    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 agoPassed402898 ms$0.002
7 h agoPassed402731 ms$0.002
12 h agoPassed402928 ms$0.002
17 h agoPassed402978 ms$0.002
22 h agoPassed402295 ms$0.002
Show 10 older checks
27 h agoPassed402838 ms$0.002
32 h agoPassed4021.8 s$0.002
37 h agoPassed402902 ms$0.002
42 h agoPassed402908 ms$0.002
46 h agoPassed402930 ms$0.002
2 days agoPassed402832 ms$0.002
2 days agoPassed402922 ms$0.002
3 days agoPassed402920 ms$0.002
3 days agoPassed402894 ms$0.002
3 days agoPassed402842 ms$0.002