Open Exchange Rates

Foreign exchange rates REST API providing historical and real-time currency exchange data for 200+ currencies with hourly updates and USD as the default base currency. Trusted by over 100,000 organizations globally, Open Exchange Rates has delivered reliable forex data since 2011 with historical coverage back to January 1, 1999.

Open Exchange Rates publishes 6 APIs on the APIs.io network, including Convert API, Currencies API, OHLC API, and 3 more. Tagged areas include Foreign Exchange, Currency, Forex, Finance, and Exchange Rates.

The Open Exchange Rates catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Open Exchange Rates’ developer surface includes authentication, documentation, pricing, support, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

59.5/100 strong ▬ flat Agent 37/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemiumSelf serve⚡ Free to try

6 APIs

Foreign ExchangeCurrencyForexFinanceExchange RatesCurrency ConversionHistorical Rates

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 59.5/100 · strong

Contract Quality 18.4 / 25

Developer Ergonomics 5.7 / 20

Commercial Clarity 14.2 / 20

Operational Transparency 6.8 / 13

Governance 7.0 / 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/open-exchange-rates: 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 6

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

Rate Limits 1

Documented rate limits and quota policies.

Open Exchange Rates Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

JSON Schema 4

Standalone JSON Schema definitions for this provider's data models.

Examples 4

Example request and response payloads for these APIs.

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 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrg

GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 4

Status, limits, changes, and where to get help

StatusPage

RateLimits

Support

Contact

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: open-exchange-rates
name: Open Exchange Rates
description: Foreign exchange rates REST API providing historical and real-time currency exchange data for 200+ currencies
  with hourly updates and USD as the default base currency. Trusted by over 100,000 organizations globally, Open Exchange
  Rates has delivered reliable forex data since 2011 with historical coverage back to January 1, 1999.
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/open-exchange-rates.png
url: https://raw.githubusercontent.com/api-evangelist/open-exchange-rates/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Foreign Exchange
- Currency
- Forex
- Finance
- Exchange Rates
- Currency Conversion
- Historical Rates
apis:
- aid: open-exchange-rates:open-exchange-rates-convert-api
  name: Open Exchange Rates Convert API
  description: Currency conversion (Unlimited plan)
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - Convert
  properties:
  - type: OpenAPI
    url: openapi/open-exchange-rates-convert-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/open-exchange-rates/refs/heads/main/json-schema/exchange-rates-response.json
  - type: Authentication
    url: https://docs.openexchangerates.org/reference/authentication
- aid: open-exchange-rates:open-exchange-rates-currencies-api
  name: Open Exchange Rates Currencies API
  description: Available currency list
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - Currencies
  properties:
  - type: OpenAPI
    url: openapi/open-exchange-rates-currencies-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/open-exchange-rates/refs/heads/main/json-schema/exchange-rates-response.json
  - type: Authentication
    url: https://docs.openexchangerates.org/reference/authentication
- aid: open-exchange-rates:open-exchange-rates-ohlc-api
  name: Open Exchange Rates OHLC API
  description: Open/High/Low/Close data (VIP Platinum plan)
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - OHLC
  properties:
  - type: OpenAPI
    url: openapi/open-exchange-rates-ohlc-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/open-exchange-rates/refs/heads/main/json-schema/exchange-rates-response.json
  - type: Authentication
    url: https://docs.openexchangerates.org/reference/authentication
- aid: open-exchange-rates:open-exchange-rates-rates-api
  name: Open Exchange Rates Rates API
  description: Live and historical exchange rate data
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - Rates
  properties:
  - type: OpenAPI
    url: openapi/open-exchange-rates-rates-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/open-exchange-rates/refs/heads/main/json-schema/exchange-rates-response.json
  - type: Authentication
    url: https://docs.openexchangerates.org/reference/authentication
- aid: open-exchange-rates:open-exchange-rates-time-series-api
  name: Open Exchange Rates Time Series API
  description: Historical time-series data (Enterprise/Unlimited plans)
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - Time Series
  properties:
  - type: OpenAPI
    url: openapi/open-exchange-rates-time-series-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/open-exchange-rates/refs/heads/main/json-schema/exchange-rates-response.json
  - type: Authentication
    url: https://docs.openexchangerates.org/reference/authentication
- aid: open-exchange-rates:open-exchange-rates-usage-api
  name: Open Exchange Rates Usage API
  description: Plan and usage statistics
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/open-exchange-rates-usage-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org/reference/api-introduction
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/open-exchange-rates/refs/heads/main/json-schema/exchange-rates-response.json
  - type: Authentication
    url: https://docs.openexchangerates.org/reference/authentication
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/open-exchange-rates/overview
- type: AgenticAccess
  url: agentic-access/open-exchange-rates-agentic-access.yml
- type: DomainSecurity
  url: security/open-exchange-rates-domain-security.yml
- type: Authentication
  url: authentication/open-exchange-rates-authentication.yml
- type: Website
  url: https://openexchangerates.org
- type: Documentation
  url: https://docs.openexchangerates.org/reference/api-introduction
- type: GitHubOrg
  url: https://github.com/openexchangerates
- type: Pricing
  url: https://openexchangerates.org/signup
- type: StatusPage
  url: https://status.openexchangerates.org
- type: Plans
  url: plans/open-exchange-rates-plans-pricing.yml
- type: RateLimits
  url: rate-limits/open-exchange-rates-rate-limits.yml
- type: FinOps
  url: finops/open-exchange-rates-finops.yml
- type: TermsOfService
  url: https://openexchangerates.org/terms
- type: PrivacyPolicy
  url: https://openexchangerates.org/privacy
- type: Support
  url: https://support.openexchangerates.org
- type: Contact
  url: https://openexchangerates.org/contact
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com