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 API contracts indexed on the APIs.io network, including Convert API, Currencies API, OHLC API, and 3 more. Tagged areas include Foreign Exchange, Currency, Exchange Rates, Currency Conversion, and Financial Data.

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 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

46.4/100 developing ▬ flat Agent 28/100 agent aware Front door AI 1/6 silent Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

2 published contracts

Foreign Exchange Currency Exchange Rates Currency Conversion Financial 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 How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 46.4/100 · developing

Contract Quality 11.7 / 21

Developer Ergonomics 5.9 / 17

Access Clarity 11.9 / 17

Operational Transparency 2.9 / 11

Contract Governance 1.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 28/100 · agent aware

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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →

5 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Developer Ergonomics scores 34.5 — up to +13.1 composite points Ask about this →
Contract Quality scores 55.1 — up to +11.2 composite points Ask about this →
Contract Governance scores 9.8 — up to +10.8 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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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 the provider profile at artifacts.apis.io/openexchangerates/apis.yml: open an issue on github.com/api-evangelist/openexchangerates to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

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 9

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

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 9

Open Exchange Rates API pricing

Prices published by Open Exchange Rates, read 2026-10-28 from openexchangerates.org/signup. A free plan or tier is listed.

Plan	Price
Free Plan	Free Plan Includes: hourly updates (with base currency USD) and up to 1,000 requests/month
The Developer Plan	$12/ month Includes: Hourly updates, 10,000 monthly API requests + All base currencies available
The Enterprise Plan	$47/ month Includes: 30-minute updates, 100,000 monthly API requests + Time-series requests
The Unlimited Plan	$97/ month Includes: 5-minute updates, Unlimited API requests + Currency conversion requests
VIP service levels	Ask us for details Includes: Live rate updates up to every 1 second, Bid-Ask and Midpoint prices, OHLCA prices, intra-day histori

Plan details, limits and sources →

Rate limits

Free Plan Monthly Requests: 1000 per month requests
Developer Plan Monthly Requests: 10000 per month requests
Enterprise Plan Monthly Requests: 100000 per month requests

Compiled by API Evangelist, not yet checked against Open Exchange Rates's documentation. All 6 limits →

Billed by: subscription · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Open Exchange Rates Plans Pricing

5 plans

PLANS

Open Exchange Rates Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Open Exchange Rates Rate Limits

6 limits

RATE LIMITS

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

Open Exchange Rates

9 quoted statements, read from Open Exchange Rates's own page on 2026-11-10.

TERMS

Privacy & Data 1

Its role, the data it processes, retention and transfers, quoted from its own privacy page.

Open Exchange Rates

21 quoted statements, read from Open Exchange Rates's own page on 2026-11-10.

PRIVACY

Eligibility 1

Who may sign up and where, quoted from its own terms.

Open Exchange Rates

3 quoted statements, read from Open Exchange Rates's own page on 2026-11-10.

ELIGIBILITY

Data License 1

How its data and outputs may be reused, quoted from its own terms.

Open Exchange Rates

2 quoted statements, read from Open Exchange Rates's own page on 2026-11-10.

LICENSE

FinOps 1

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

Open Exchange Rates 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. Counts are the severity each rule declares, not results of running them.

Open Exchange Rates — jsonschema rules

5 rules · 4 warn-severity 1 info-severity

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.

Open Exchange Rates Authentication

apiKey · 2 schemes

SECURITY

Open Exchange Rates Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Open Exchange Rates 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

StatusPage

Support

Contact

Commercial 7

Pricing, plans, and the legal terms of use

Pricing

Plans

FinOps

TermsOfService

PrivacyPolicy

UsageTerms

DataLicense

Scroll for all 7

Company 2

The organization behind the API

LinkedIn

Website

Website

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

DataProcessing

DataProcessing

Eligibility

Eligibility

Source (apis.yml)

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
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  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
- Currency Conversion
- Financial Data
tags_raw:
- 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
- type: UsageTerms
  url: terms/openexchangerates-terms-of-service.yml
- type: DataProcessing
  url: privacy/openexchangerates-privacy-policy.yml
- type: Eligibility
  url: eligibility/openexchangerates-eligibility.yml
- type: DataLicense
  url: data-license/openexchangerates-data-license.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-merged-from:
- open-exchange-rates

Open Exchange Rates API — frequently asked questions

Does Open Exchange Rates have an API?

Yes. APIs.io lists 6 APIs from Open Exchange Rates, including Open Exchange Rates Convert API, Open Exchange Rates Currencies API and Open Exchange Rates OHLC API, and 3 more.

Is there an OpenAPI specification for the Open Exchange Rates API?

Yes. APIs.io indexes 6 OpenAPI specifications for Open Exchange Rates, each linked for download from this page.

How do I authenticate with the Open Exchange Rates API?

Open Exchange Rates uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Open Exchange Rates Authentication.

How much does the Open Exchange Rates API cost?

Open Exchange Rates publishes its prices; its Free Plan plan is Free Plan as of 2026-10-28. APIs.io lists 5 pricing plans for Open Exchange Rates, with each plan's price, limits and inclusions under Pricing on this page.

Is the Open Exchange Rates API ready for AI agents?

Open Exchange Rates has a Kin Score of 46.4 out of 100 (developing) and an Agent Readiness score of 28.4 (agent-aware), scored by API Evangelist on 2026-11-13.

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