Forex

A collection of foreign exchange and currency conversion APIs.

Forex is listed with 7 APIs on the APIs.io network, including Account API, Rates API, Reference API, and 4 more. Tagged areas include Currency, Exchange Rates, Financial Data, Foreign Exchange, and Trading.

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

Forex’s developer surface includes authentication and 8 more developer resources.

📡 Profile data on GitHub

29.2/100 thin ▬ flat Agent 23/100 agent aware Heartbeat 64/100 slowing saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

7 APIs

Currency Exchange Rates Financial Data Foreign Exchange Trading

Kin Score

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

Composite quality — 29.2/100 · thin

Contract Quality 8.7 / 21

Developer Ergonomics 2.6 / 17

Access Clarity 5.4 / 17

Operational Transparency 2.1 / 11

Contract Governance 1.4 / 10

Discoverability 5.3 / 9

Regulatory Posture 2.2 / 15

Agent readiness — 23/100 · 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 Securities & Market Data regime (on an ambiguous tag, where no other regime matched), 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):

Developer Ergonomics scores 15.5 — up to +16.9 composite points Ask about this →
Contract Quality scores 41.0 — up to +14.8 composite points Ask about this →
Access Clarity scores 31.9 — 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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/forex/apis.yml: open an issue on github.com/api-evangelist/forex 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 7

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

Fixer.io API

Foreign exchange rates and currency conversion API.

ExchangeRate-API

Free currency conversion API with 161 currencies.

CurrencyAPI

Accurate and reliable foreign exchange rates API.

Frankfurter API

Free and open-source API for current and historical forex rates.

Forex Account API

The Account API from Forex — 1 operation(s) for account.

Forex Rates API

The Rates API from Forex — 3 operation(s) for rates.

Forex Reference API

The Reference API from Forex — 1 operation(s) for reference.

Scroll for all 7

Open Collections 4

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

Open Exchange Rates Account API

OPEN COLLECTION

Open Exchange Account Rates API

OPEN COLLECTION

Open Exchange Rates Account Reference API

OPEN COLLECTION

Open Exchange Rates API

OPEN COLLECTION

Forex API pricing

Not yet checked against Forex's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Forex's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Forex Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Forex Rate Limits

5 limits

RATE LIMITS

Terms of Service 1

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

Forex

12 quoted statements, read from Forex's own page on 2026-11-09.

TERMS

Eligibility 1

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

Forex

1 quoted statement, read from Forex's own page on 2026-11-09.

ELIGIBILITY

Data License 1

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

Forex

2 quoted statements, read from Forex's own page on 2026-11-09.

LICENSE

FinOps 1

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

Forex 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.

Forex API Rules

41 rules · 39 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

Forex Authentication

apiKey · 1 scheme

SECURITY

Forex Domain Security

TLSv1.2 · HSTS · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Forex Agentic Access

5 operations

5 operations · 0 acting

AGENTIC

Resources

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 4

Pricing, plans, and the legal terms of use

Plans

FinOps

UsageTerms

DataLicense

Other 1

Properties that don't map to a standard resource type

Eligibility

Eligibility

Source (apis.yml)

aid: forex
name: Forex
description: A collection of foreign exchange and currency conversion APIs.
type: Index
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/forex.png
url: https://raw.githubusercontent.com/api-evangelist/forex/refs/heads/main/apis.yml
created: '2024-01-15'
modified: '2026-05-19'
specificationVersion: '0.23'
tags:
- Currency
- Exchange Rates
- Financial Data
- Foreign Exchange
- Trading
tags_raw:
- Currency
- Exchange Rates
- Financial Data
- Forex
- Trading
apis:
- aid: forex:fixer
  name: Fixer.io API
  description: Foreign exchange rates and currency conversion API.
  humanURL: https://fixer.io
  baseURL: https://api.fixer.io
  tags:
  - Currency
  - Exchange Rates
  properties:
  - type: Documentation
    url: https://fixer.io/documentation
  - type: Pricing
    url: https://fixer.io/product
- aid: forex:exchangerate-api
  name: ExchangeRate-API
  description: Free currency conversion API with 161 currencies.
  humanURL: https://www.exchangerate-api.com
  baseURL: https://v6.exchangerate-api.com/v6
  tags:
  - Currency Conversion
  - Exchange Rates
  properties:
  - type: Documentation
    url: https://www.exchangerate-api.com/docs
  - type: Pricing
    url: https://www.exchangerate-api.com/pricing
  - type: TermsOfService
    url: https://www.exchangerate-api.com/terms
- aid: forex:currencyapi
  name: CurrencyAPI
  description: Accurate and reliable foreign exchange rates API.
  humanURL: https://currencyapi.com
  baseURL: https://api.currencyapi.com/v3
  tags:
  - Foreign Exchange
  - Historical Data
  - Real-Time Rates
  tags_raw:
  - Forex
  - Historical Data
  - Real-Time Rates
  properties:
  - type: Documentation
    url: https://currencyapi.com/docs
  - type: Pricing
    url: https://currencyapi.com/pricing
  - type: StatusPage
    url: https://status.currencyapi.com
- aid: forex:frankfurter
  name: Frankfurter API
  description: Free and open-source API for current and historical forex rates.
  humanURL: https://www.frankfurter.app
  baseURL: https://api.frankfurter.app
  tags:
  - Exchange Rates
  - Free
  - Open Source
  tags_raw:
  - Exchange Rates
  - Free
  - Open Source
  - Open-Source
  properties:
  - type: Documentation
    url: https://www.frankfurter.app/docs
  - type: GitHubOrganization
    url: https://github.com/hakanensari/frankfurter
- aid: forex:forex-account-api
  name: Forex Account API
  description: The Account API from Forex — 1 operation(s) for account.
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/forex-account-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org
  - type: Pricing
    url: https://openexchangerates.org/signup
  - type: Authentication
    url: https://docs.openexchangerates.org/authentication
- aid: forex:forex-rates-api
  name: Forex Rates API
  description: The Rates API from Forex — 3 operation(s) for rates.
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - Rates
  properties:
  - type: OpenAPI
    url: openapi/forex-rates-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org
  - type: Pricing
    url: https://openexchangerates.org/signup
  - type: Authentication
    url: https://docs.openexchangerates.org/authentication
- aid: forex:forex-reference-api
  name: Forex Reference API
  description: The Reference API from Forex — 1 operation(s) for reference.
  humanURL: https://openexchangerates.org
  baseURL: https://openexchangerates.org/api
  tags:
  - Reference
  properties:
  - type: OpenAPI
    url: openapi/forex-reference-api-openapi.yml
  - type: Documentation
    url: https://docs.openexchangerates.org
  - type: Pricing
    url: https://openexchangerates.org/signup
  - type: Authentication
    url: https://docs.openexchangerates.org/authentication
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
common:
- type: Plans
  url: plans/forex-plans-pricing.yml
- type: RateLimits
  url: rate-limits/forex-rate-limits.yml
- type: FinOps
  url: finops/forex-finops.yml
- type: AgenticAccess
  url: agentic-access/forex-agentic-access.yml
- type: DomainSecurity
  url: security/forex-domain-security.yml
- type: Authentication
  url: authentication/forex-authentication.yml
- type: UsageTerms
  url: terms/forex-terms-of-service.yml
- type: Eligibility
  url: eligibility/forex-eligibility.yml
- type: DataLicense
  url: data-license/forex-data-license.yml

Forex API — frequently asked questions

Does Forex have an API?

Yes. APIs.io lists 7 APIs from Forex, including Fixer.io API, ExchangeRate-API and CurrencyAPI, and 4 more.

Is there an OpenAPI specification for the Forex API?

Yes. APIs.io indexes 3 OpenAPI specifications for Forex, each linked for download from this page.

How do I authenticate with the Forex API?

Forex uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Forex Authentication.

How much does the Forex API cost?

APIs.io lists 3 pricing plans for Forex, with each plan's price, limits and inclusions under Pricing on this page.

Is the Forex API ready for AI agents?

Forex has a Kin Score of 29.2 out of 100 (thin) and an Agent Readiness score of 22.7 (agent-aware), scored by API Evangelist on 2026-11-13.

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