Open Exchange Rates

Open Exchange Rates provides a simple, reliable REST API for live and historical foreign exchange (forex) rates covering 200+ world currencies, with end-of-day historical data back to January 1st, 1999. The JSON API delivers latest rates, historical snapshots, bulk time-series, currency conversion, and OHLC data, authenticated with a per-account App ID and priced in published monthly tiers that start with a free plan.

Open Exchange Rates publishes 7 APIs on the APIs.io network, including Convert API, Currencies API, Historical Rates API, and 4 more. Tagged areas include Foreign Exchange, Currency, Exchange Rates, FX, and Currency Conversion.

Open Exchange Rates’ developer surface includes authentication, documentation, pricing, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
41.9/100 thin ▬ flat Agent 37/100 agent ready Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemiumSelf serve⚡ Free to try
7 APIs
Foreign ExchangeCurrencyExchange RatesFXCurrency ConversionForexFinancial Data

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 41.9/100 · thin
Contract Quality 15.8 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 37/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/openexchangerates: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

Open Exchange Rates Convert API

Convert a value between two currencies at the latest rates.

Open Exchange Rates Currencies API

List of supported currency symbols and names.

Open Exchange Rates Historical Rates API

End-of-day rates for any date back to 1999-01-01.

Open Exchange Rates Latest Rates API

Current exchange rates relative to a base currency.

Open Exchange Rates OHLC API

Open, high, low, close, and average rates for a period.

Open Exchange Rates Time Series API

Bulk daily historical rates for a date range.

Open Exchange Rates Usage API

Account plan and usage statistics.

Scroll for all 7

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Open Exchange Rates API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Openexchangerates Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Openexchangerates Rate Limits

6 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Openexchangerates Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Openexchangerates Authentication

apiKey · 2 schemes

SECURITY

Openexchangerates Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Openexchangerates Agentic Access

7 operations

7 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: openexchangerates
url: https://raw.githubusercontent.com/api-evangelist/openexchangerates/refs/heads/main/apis.yml
name: Open Exchange Rates
kind: company
description: Open Exchange Rates provides a simple, reliable REST API for live and historical foreign exchange (forex) rates
  covering 200+ world currencies, with end-of-day historical data back to January 1st, 1999. The JSON API delivers latest
  rates, historical snapshots, bulk time-series, currency conversion, and OHLC data, authenticated with a per-account App
  ID and priced in published monthly tiers that start with a free plan.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/openexchangerates.png
tags:
- Foreign Exchange
- Currency
- Exchange Rates
- FX
- Currency Conversion
- Forex
- Financial Data
created: '2026-07-11'
modified: '2026-07-11'
specificationVersion: '0.19'
apis:
- aid: openexchangerates:openexchangerates-convert-api
  name: Open Exchange Rates Convert API
  description: Convert a value between two currencies at the latest rates.
  humanURL: https://docs.openexchangerates.org/reference/latest-json
  baseURL: https://openexchangerates.org/api
  tags:
  - Convert
  properties:
  - type: OpenAPI
    url: openapi/openexchangerates-convert-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/latest-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/historical-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/time-series-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/convert
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/currencies-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/ohlc-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/usage-json
- aid: openexchangerates:openexchangerates-currencies-api
  name: Open Exchange Rates Currencies API
  description: List of supported currency symbols and names.
  humanURL: https://docs.openexchangerates.org/reference/latest-json
  baseURL: https://openexchangerates.org/api
  tags:
  - Currencies
  properties:
  - type: OpenAPI
    url: openapi/openexchangerates-currencies-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/latest-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/historical-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/time-series-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/convert
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/currencies-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/ohlc-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/usage-json
- aid: openexchangerates:openexchangerates-historical-rates-api
  name: Open Exchange Rates Historical Rates API
  description: End-of-day rates for any date back to 1999-01-01.
  humanURL: https://docs.openexchangerates.org/reference/latest-json
  baseURL: https://openexchangerates.org/api
  tags:
  - Historical Rates
  properties:
  - type: OpenAPI
    url: openapi/openexchangerates-historical-rates-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/latest-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/historical-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/time-series-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/convert
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/currencies-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/ohlc-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/usage-json
- aid: openexchangerates:openexchangerates-latest-rates-api
  name: Open Exchange Rates Latest Rates API
  description: Current exchange rates relative to a base currency.
  humanURL: https://docs.openexchangerates.org/reference/latest-json
  baseURL: https://openexchangerates.org/api
  tags:
  - Latest Rates
  properties:
  - type: OpenAPI
    url: openapi/openexchangerates-latest-rates-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/latest-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/historical-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/time-series-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/convert
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/currencies-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/ohlc-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/usage-json
- aid: openexchangerates:openexchangerates-ohlc-api
  name: Open Exchange Rates OHLC API
  description: Open, high, low, close, and average rates for a period.
  humanURL: https://docs.openexchangerates.org/reference/latest-json
  baseURL: https://openexchangerates.org/api
  tags:
  - OHLC
  properties:
  - type: OpenAPI
    url: openapi/openexchangerates-ohlc-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/latest-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/historical-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/time-series-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/convert
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/currencies-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/ohlc-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/usage-json
- aid: openexchangerates:openexchangerates-time-series-api
  name: Open Exchange Rates Time Series API
  description: Bulk daily historical rates for a date range.
  humanURL: https://docs.openexchangerates.org/reference/latest-json
  baseURL: https://openexchangerates.org/api
  tags:
  - Time Series
  properties:
  - type: OpenAPI
    url: openapi/openexchangerates-time-series-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/latest-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/historical-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/time-series-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/convert
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/currencies-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/ohlc-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/usage-json
- aid: openexchangerates:openexchangerates-usage-api
  name: Open Exchange Rates Usage API
  description: Account plan and usage statistics.
  humanURL: https://docs.openexchangerates.org/reference/latest-json
  baseURL: https://openexchangerates.org/api
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/openexchangerates-usage-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/latest-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/historical-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/time-series-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/convert
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/currencies-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/ohlc-json
  - type: APIReference
    url: https://docs.openexchangerates.org/reference/usage-json
common:
- type: AgenticAccess
  url: agentic-access/openexchangerates-agentic-access.yml
- type: DomainSecurity
  url: security/openexchangerates-domain-security.yml
- type: Authentication
  url: authentication/openexchangerates-authentication.yml
- type: GitHubOrganization
  url: https://github.com/openexchangerates
- type: LinkedIn
  url: https://www.linkedin.com/company/open-exchange-rates
- type: Website
  url: https://openexchangerates.org
- type: Documentation
  url: https://docs.openexchangerates.org
- type: Pricing
  url: https://openexchangerates.org/signup
- type: Plans
  url: plans/openexchangerates-plans-pricing.yml
- type: RateLimits
  url: rate-limits/openexchangerates-rate-limits.yml
- type: FinOps
  url: finops/openexchangerates-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com