Open Exchange Rates website screenshot

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 6 APIs on the APIs.io network, including Convert API, Currencies API, OHLC API, and 3 more. Tagged areas include Foreign Exchange, Currency, Exchange Rates, FX, and Currency Conversion.

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 15 more developer resources.

🌐 Visit website 📡 Source on GitHub
48.8/100 developing ▬ flat Agent 29/100 agent ready Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0
AccessFreemiumSelf serve⚡ Free to try
2 published contracts
Foreign ExchangeCurrencyExchange RatesFXCurrency ConversionForexFinancial Data

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Developer Platform & API Ecosystem Management
BC-4270
Usage
GET /usage.json

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0
Composite quality — 48.8/100 · developing
Contract Quality 11.7 / 21
Developer Ergonomics 5.3 / 17
Access Clarity 11.5 / 17
Operational Transparency 5.2 / 11
Contract Governance 1.0 / 10
Discoverability 5.6 / 9
Regulatory Posture 3.7 / 15
Agent readiness — 29/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 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 4 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. 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. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

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 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.

Open Exchange Rates API

Live and historical exchange rate data

Postman Collections 6

Ready-to-run Postman collections for exercising this provider's APIs.

Open Exchange Rates Convert API

POSTMAN

Open Exchange Rates Convert Currencies API

POSTMAN

Open Exchange Rates Convert OHLC API

POSTMAN

Open Exchange Convert Rates API

POSTMAN

Open Exchange Rates Convert Time Series API

POSTMAN

Open Exchange Rates Convert Usage API

POSTMAN

Open Collections 10

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

API Collection

OPEN COLLECTION

Open Exchange Rates Convert API

OPEN COLLECTION

Open Exchange Rates Convert Currencies API

OPEN COLLECTION

Open Exchange Rates Convert Historical Rates API

OPEN COLLECTION

Open Exchange Rates Convert Latest Rates API

OPEN COLLECTION

Open Exchange Rates Convert OHLC API

OPEN COLLECTION

Open Exchange Convert Rates API

OPEN COLLECTION

Open Exchange Rates Convert Time Series API

OPEN COLLECTION

Open Exchange Rates Convert Usage API

OPEN COLLECTION

Open Exchange Rates API

OPEN COLLECTION

Scroll for all 10

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

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Open Exchange Rates Context

3 classes · 24 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Open Exchange Rates API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 4

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

ConvertResponse

5 properties

JSON SCHEMA

CurrenciesResponse

0 properties

JSON SCHEMA

ExchangeRatesResponse

5 properties

JSON SCHEMA

OHLCResponse

6 properties

JSON SCHEMA

Examples 4

Example request and response payloads for these APIs.

Convert Response

5 fields

EXAMPLE

Latest Rates

5 fields

EXAMPLE

Ohlc Response

6 fields

EXAMPLE

Time Series Response

6 fields

EXAMPLE

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 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 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

RateLimits
RateLimits
 StatusPage
StatusPage
 Support
Support
 Contact
Contact

Commercial 5

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Other 1

Properties that don't map to a standard resource type

CapabilityMap
CapabilityMap

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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/openexchangerates.png
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-04
tags:
- Foreign Exchange
- Currency
- Exchange Rates
- FX
- Currency Conversion
- Forex
- Financial Data
created: '2026-07-11'
modified: '2026-09-16'
specificationVersion: '0.23'
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:
  - Currency
  tags_raw:
  - 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-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
- aid: openexchangerates:openexchangerates-rates-api
  name: Open Exchange Rates API
  description: Live and historical exchange rate data
  humanURL: https://docs.openexchangerates.org/reference/latest-json
  baseURL: https://openexchangerates.org/api
  tags:
  - Rates
  properties:
  - type: OpenAPI
    url: openapi/openexchangerates-rates-api-openapi.yml
common:
- type: CapabilityMap
  url: capabilities/openexchangerates-capability-edges.yml
  name: Open Exchange Rates Business Capability Map
- 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
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/open-exchange-rates/overview
- type: GitHubOrg
  url: https://github.com/openexchangerates
- type: StatusPage
  url: https://status.openexchangerates.org
- 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
x-merged-from:
- open-exchange-rates

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