FXRatesAPI

FXRatesAPI is a foreign exchange rates REST API that delivers real-time and historical currency exchange rates for 185+ fiat currencies plus major cryptocurrencies and precious metals. It exposes JSON endpoints for the latest rates, historical rates for any past date, time-series ranges, currency conversion, and a currencies list. A limited tier is usable without an API key; higher request quotas, more frequent updates, and additional base-currency switching are unlocked with a paid API key passed via the api_key query parameter or an Authorization Bearer header.

FXRatesAPI publishes 5 API contracts indexed on the APIs.io network, including Convert API, Currencies API, Historical Rates API, and 2 more. Tagged areas include Foreign Exchange, Currency, Exchange Rates, Currency Conversion, and Historical Rates.

The FXRatesAPI catalog on APIs.io includes 1 Spectral governance ruleset.

FXRatesAPI’s developer surface includes engineering blog, authentication, documentation, and 6 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

19.6/100 emerging ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumOpen⚡ Free to try

1 published contract

Foreign Exchange Currency Exchange Rates Currency Conversion Historical Rates Financial Data Cryptocurrency

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 19.6/100 · emerging

Contract Quality 4.1 / 21

Developer Ergonomics 5.5 / 17

Access Clarity 0.7 / 17

Operational Transparency 0.5 / 11

Contract Governance 1.4 / 10

Discoverability 5.6 / 9

Regulatory Posture 0.9 / 15

Agent readiness — 21/100 · 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 0 / 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 →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link 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 →

6 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 19.2 — up to +20.2 composite points Ask about this →
Access Clarity scores 4.3 — up to +19.1 composite points Ask about this →
Developer Ergonomics scores 32.1 — up to +13.6 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/fxratesapi/apis.yml: open an issue on github.com/api-evangelist/fxratesapi 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 5

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

FXRatesAPI Convert API

Convert an amount between two currencies.

FXRatesAPI Currencies API

List of supported currencies and their metadata.

FXRatesAPI Historical Rates API

Exchange rates for a specific past date.

FXRatesAPI Latest Rates API

Most recent exchange rates for a base currency.

FXRatesAPI Time-Series API

Daily exchange rates across a date range.

Open Collections 6

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

FXRates Convert API

OPEN COLLECTION

FXRates Convert Currencies API

OPEN COLLECTION

FXRates Convert Historical Rates API

OPEN COLLECTION

FXRates Convert Latest Rates API

OPEN COLLECTION

FXRates Convert Time-Series API

OPEN COLLECTION

FXRatesAPI

OPEN COLLECTION

FXRatesAPI pricing

Not yet checked against FXRatesAPI's own pricing page. Compiled by API Evangelist on 2026-07-12 from fxratesapi.com/pricing; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free free	Free
Paid Subscription subscription	—

Plan details, limits and sources →

Rate limits

Monthly Request Quota: see provider documentation requests

Compiled by API Evangelist, not yet checked against FXRatesAPI's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

FXRatesAPI Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

FXRatesAPI Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

FXRatesAPI Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

FXRatesAPI API Rules

66 rules · 63 error-severity 1 warn-severity 2 info-severity

SPECTRAL

Security Posture 2

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

FXRatesAPI Authentication

apiKey/http · 2 schemes

SECURITY

FXRatesAPI Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

FXRatesAPI Agentic Access

5 operations

5 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

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 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

Blog

Blog

Website

Website

Source (apis.yml)

aid: fxratesapi
url: https://raw.githubusercontent.com/api-evangelist/fxratesapi/refs/heads/main/apis.yml
name: FXRatesAPI
kind: company
description: FXRatesAPI is a foreign exchange rates REST API that delivers real-time and historical currency exchange rates
  for 185+ fiat currencies plus major cryptocurrencies and precious metals. It exposes JSON endpoints for the latest rates,
  historical rates for any past date, time-series ranges, currency conversion, and a currencies list. A limited tier is usable
  without an API key; higher request quotas, more frequent updates, and additional base-currency switching are unlocked with
  a paid API key passed via the api_key query parameter or an Authorization Bearer header.
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: open
  trial: false
  try_now: true
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Open access
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fxratesapi.png
tags:
- Foreign Exchange
- Currency
- Exchange Rates
- Currency Conversion
- Historical Rates
- Financial Data
- Cryptocurrency
tags_raw:
- Foreign Exchange
- FX
- Currency
- Exchange Rates
- Forex
- Currency Conversion
- Historical Rates
- Financial Data
- Cryptocurrencies
created: '2026-07-12'
modified: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: fxratesapi:fxratesapi-convert-api
  name: FXRatesAPI Convert API
  description: Convert an amount between two currencies.
  humanURL: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  baseURL: https://api.fxratesapi.com
  tags:
  - Convert
  properties:
  - type: OpenAPI
    url: openapi/fxratesapi-convert-api-openapi.yml
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  - type: Documentation
    url: https://fxratesapi.com/docs
  - type: PostmanCollection
    url: collections/fxratesapi.postman_collection.json
  - type: OpenCollection
    url: collections/fxratesapi.opencollection.json
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/historical-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/time-series-exchange-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/convert-currency
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/list-available-currencies
  - type: Documentation
    url: https://fxratesapi.com/docs/currency-list
- aid: fxratesapi:fxratesapi-currencies-api
  name: FXRatesAPI Currencies API
  description: List of supported currencies and their metadata.
  humanURL: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  baseURL: https://api.fxratesapi.com
  tags:
  - Currency
  tags_raw:
  - Currencies
  properties:
  - type: OpenAPI
    url: openapi/fxratesapi-currencies-api-openapi.yml
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  - type: Documentation
    url: https://fxratesapi.com/docs
  - type: PostmanCollection
    url: collections/fxratesapi.postman_collection.json
  - type: OpenCollection
    url: collections/fxratesapi.opencollection.json
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/historical-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/time-series-exchange-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/convert-currency
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/list-available-currencies
  - type: Documentation
    url: https://fxratesapi.com/docs/currency-list
- aid: fxratesapi:fxratesapi-historical-rates-api
  name: FXRatesAPI Historical Rates API
  description: Exchange rates for a specific past date.
  humanURL: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  baseURL: https://api.fxratesapi.com
  tags:
  - Historical Rates
  properties:
  - type: OpenAPI
    url: openapi/fxratesapi-historical-rates-api-openapi.yml
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  - type: Documentation
    url: https://fxratesapi.com/docs
  - type: PostmanCollection
    url: collections/fxratesapi.postman_collection.json
  - type: OpenCollection
    url: collections/fxratesapi.opencollection.json
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/historical-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/time-series-exchange-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/convert-currency
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/list-available-currencies
  - type: Documentation
    url: https://fxratesapi.com/docs/currency-list
- aid: fxratesapi:fxratesapi-latest-rates-api
  name: FXRatesAPI Latest Rates API
  description: Most recent exchange rates for a base currency.
  humanURL: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  baseURL: https://api.fxratesapi.com
  tags:
  - Latest Rates
  properties:
  - type: OpenAPI
    url: openapi/fxratesapi-latest-rates-api-openapi.yml
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  - type: Documentation
    url: https://fxratesapi.com/docs
  - type: PostmanCollection
    url: collections/fxratesapi.postman_collection.json
  - type: OpenCollection
    url: collections/fxratesapi.opencollection.json
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/historical-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/time-series-exchange-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/convert-currency
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/list-available-currencies
  - type: Documentation
    url: https://fxratesapi.com/docs/currency-list
- aid: fxratesapi:fxratesapi-time-series-api
  name: FXRatesAPI Time-Series API
  description: Daily exchange rates across a date range.
  humanURL: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  baseURL: https://api.fxratesapi.com
  tags:
  - Time Series
  tags_raw:
  - Time-Series
  properties:
  - type: OpenAPI
    url: openapi/fxratesapi-time-series-api-openapi.yml
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/latest-exchange-rates
  - type: Documentation
    url: https://fxratesapi.com/docs
  - type: PostmanCollection
    url: collections/fxratesapi.postman_collection.json
  - type: OpenCollection
    url: collections/fxratesapi.opencollection.json
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/historical-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/time-series-exchange-rates
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/convert-currency
  - type: APIReference
    url: https://fxratesapi.com/docs/endpoints/list-available-currencies
  - type: Documentation
    url: https://fxratesapi.com/docs/currency-list
common:
- url: https://fxratesapi.com/blog
  type: Blog
- type: AgenticAccess
  url: agentic-access/fxratesapi-agentic-access.yml
- type: DomainSecurity
  url: security/fxratesapi-domain-security.yml
- type: Authentication
  url: authentication/fxratesapi-authentication.yml
- type: Website
  url: https://fxratesapi.com
- type: Documentation
  url: https://fxratesapi.com/docs
- type: Plans
  url: plans/fxratesapi-plans-pricing.yml
- type: RateLimits
  url: rate-limits/fxratesapi-rate-limits.yml
- type: FinOps
  url: finops/fxratesapi-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

FXRatesAPI — frequently asked questions

Does FXRatesAPI have an API?

Yes. APIs.io lists 5 APIs from FXRatesAPI, including FXRatesAPI Convert API, FXRatesAPI Currencies API and FXRatesAPI Historical Rates API, and 2 more.

Is there an OpenAPI specification for the FXRatesAPI?

Yes. APIs.io indexes 5 OpenAPI specifications for FXRatesAPI, each linked for download from this page.

How do I authenticate with the FXRatesAPI?

FXRatesAPI uses bearer-token authentication (apiKey/http · 2 schemes). The details are profiled on APIs.io as FXRatesAPI Authentication.

How much does the FXRatesAPI cost?

APIs.io lists 2 pricing plans for FXRatesAPI, with each plan's price, limits and inclusions under Pricing on this page.

Is the FXRatesAPI ready for AI agents?

FXRatesAPI has a Kin Score of 19.6 out of 100 (emerging) and an Agent Readiness score of 20.7 (agent-aware), scored by API Evangelist on 2026-11-13.

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