Headline central-bank policy/benchmark rates side-by-side in one call, normalized: US (Fed effective funds rate), Euro area (ECB deposit facility rate), Japan (BoJ call-money benchmark), United Kingdom (SONIA, which tracks the BoE Bank Rate). Each result names the bank, country, the rate, the as-of date, the FRED series id, and a label stating exactly which instrument it is (banks don't all publish the same policy instrument). Pass bank to filter (one of: fed, ecb, boj, boe), or omit for all. Source: FRED (St. Louis Fed).
/api/finance/central-bank-ratesPAYMENT-SIGNATURE.The central bank rates API is a pay-per-call finance endpoint built for AI agents and autonomous software. Headline central-bank policy/benchmark rates side-by-side in one call, normalized: US (Fed effective funds rate), Euro area (ECB deposit facility rate), Japan (BoJ call-money benchmark), United Kingdom (SONIA, which tracks the BoE Bank Rate).
There is no signup and no API key. An agent (or any HTTP client) hits the endpoint, receives an x402 "402 Payment Required" challenge, signs a sub-cent USDC payment on Base or Solana, and retries — the data comes back on the paid request. That makes it a drop-in central bank rates data source for an agent tool-use loop, an MCP host, or a backend that needs finance data on demand without onboarding to yet another vendor portal.
| Name | Type | Description |
|---|---|---|
bank | string | Bank code to filter. One of: fed, ecb, boj, boe. Omit for all. one of: fed | ecb | boj | boe |
# 1. Probe with no auth → 402 envelope with PaymentRequirements curl -sS 'https://2s.io/api/finance/central-bank-rates?bank=fed' # 2. Sign + retry with PAYMENT-SIGNATURE: curl -sS 'https://2s.io/api/finance/central-bank-rates?bank=fed' \ -H 'PAYMENT-SIGNATURE: <base64-json-payload>' # Or use the canonical runner (handles probe → sign → retry): # EVM_PRIVATE_KEY=0x... node --env-file=.env.local \ # --experimental-strip-types scripts/x402-pay.ts \ # 'https://2s.io/api/finance/central-bank-rates?bank=fed'
import { TwoS } from '@2sio/sdk'
const client = new TwoS({
privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})
const result = await client.finance.centralBankRates({
"bank": "fed"
})
console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)import os
from twosio import TwoS
client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])
result = client.finance.central_bank_rates(bank="fed")
print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
// EVM_PRIVATE_KEY funds x402 payments per call.
// claude_desktop_config.json
{
"mcpServers": {
"2sio": {
"command": "npx",
"args": ["-y", "@2sio/mcp"],
"env": { "EVM_PRIVATE_KEY": "0x..." }
}
}
}
// 2. Once the server is running, agents call this tool via standard MCP:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/call",
"params": {
"name": "finance.central-bank-rates",
"arguments": {
"bank": "fed"
}
}
}| Field | Type | Description |
|---|---|---|
ok | boolean | one of: true |
items | array | |
total | integer | Total matching rows upstream; null when unknown. |
source | object |
{
"ok": true,
"items": [
{
"bank": "example",
"country": "example",
"code": "example",
"rate": 1,
"date": "example",
"seriesId": "example",
"label": "example"
}
],
"total": 1,
"source": {
"provider": "example",
"url": "example",
"license": "example"
}
}