Interest Rate API

About the Interest Rate API

Interest Rate works by aggregating central bank policy rate data from FRED (Federal Reserve Economic Data) for 22 major central banks including the Federal Reserve, European Central Bank, Bank of England, and more. Data is refreshed daily with historical data available back to 2000.

What people use it for

Forex Trading Strategies

Algorithmic currency traders evaluate interest rate differentials between countries to identify carry trade opportunities and adjust open positions before policy announcements.

Fixed Income Portfolios

When evaluating sovereign debt yields, bond portfolio managers compare current policy rates against benchmark curves to model duration risks across international markets.

Macroeconomic Dashboards

Financial media portals publish current central bank benchmark rates and recent change directions next to national inflation reports for market researchers.

Loan Underwriting Calculations

Calculate cross-border financing costs by feeding sovereign policy rates directly into commercial lending valuation models across 22 tracked economies.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON

Default REST response

XML

Markup format

YAML

Human-readable

CSV

Tabular export

Beta

GraphQL

Query language

New

MCP

For AI agents

Request parameters — GET /v1/interestrate

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Optional

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curl "https://api.apiverve.com/v1/interestrate?country=US&date=2024-06" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Response — GET /v1/interestrate

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

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{
  "status": "ok",
  "error": null,
  "data": {
    "country": "US",
    "countryName": "United States",
    "centralBank": "Federal Reserve",
    "rate": 4.5,
    "date": "2026-02-05",
    "lastUpdated": "2026-02-05T05:00:00.000Z",
    "lastChanged": "2026-01-29",
    "change": -0.25,
    "changeDirection": "down",
    "previousRate": 4.75
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Zero-code embed — one snippet, no backend

Drop an interactive Interest Rate form onto any page. The widget calls the API for you, so no key ever appears in your markup and there is nothing to deploy.

Changelog — Interest Rate API

Every change to this endpoint, newest first. Breaking changes ship as a new version and the previous one keeps serving — response fields are added, never removed or retyped in place, so an integration written against v1 keeps working.

Currently v1Data refreshed daily