CurrencyBeacon

Currency exchange rates REST API providing real-time mid-market rates for 170+ fiat currencies and cryptocurrencies, with 30 years of historical data, server-side conversion, timeseries analysis, and MCP server support for LLM integrations. Sourced from central banks and trusted financial institutions with 99.99% uptime.

CurrencyBeacon publishes 3 APIs on the APIs.io network: Conversion API, Currencies API, and Rates API. Tagged areas include Currency, Exchange Rates, Forex, Cryptocurrency, and Financial Data.

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

CurrencyBeacon’s developer surface includes authentication, documentation, pricing, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.4/100 developing ▬ flat Agent 29/100 agent ready Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Currency Exchange Rates Forex Cryptocurrency Financial Data Historical Rates Currency Conversion

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 39.4/100 · developing

Contract Quality 11.2 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 8.0 / 17

Operational Transparency 4.6 / 11

Contract Governance 1.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.8 / 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/currencybeacon: 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 3

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

CurrencyBeacon Conversion API

Currency conversion operations

CurrencyBeacon Currencies API

Supported currencies information

CurrencyBeacon Rates API

Currency exchange rate operations

Open Collections 4

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

API Collection

OPEN COLLECTION

CurrencyBeacon conversion API

OPEN COLLECTION

CurrencyBeacon conversion currencies API

OPEN COLLECTION

CurrencyBeacon conversion rates API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Currencybeacon Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Currencybeacon Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Currencybeacon Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

CurrencyBeacon API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 3

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

ConversionResponse

6 properties

JSON SCHEMA

CurrencyInfo

7 properties

JSON SCHEMA

LatestRatesResponse

4 properties

JSON SCHEMA

Examples 4

Example request and response payloads for these APIs.

Conversion Example

6 fields

EXAMPLE

Currencies Example

2 fields

EXAMPLE

Latest Rates Example

4 fields

EXAMPLE

Timeseries Example

5 fields

EXAMPLE

Security Posture 2

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

Currencybeacon Authentication

apiKey/http · 2 schemes

SECURITY

Currencybeacon Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Currencybeacon 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

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

FinOps

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: currencybeacon
name: CurrencyBeacon
description: Currency exchange rates REST API providing real-time mid-market rates for 170+ fiat currencies and cryptocurrencies,
  with 30 years of historical data, server-side conversion, timeseries analysis, and MCP server support for LLM integrations.
  Sourced from central banks and trusted financial institutions with 99.99% uptime.
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/currencybeacon.png
url: https://raw.githubusercontent.com/api-evangelist/currencybeacon/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
tags:
- Currency
- Exchange Rates
- Forex
- Cryptocurrency
- Financial Data
- Historical Rates
- Currency Conversion
apis:
- aid: currencybeacon:currencybeacon-conversion-api
  name: CurrencyBeacon Conversion API
  description: Currency conversion operations
  humanURL: https://currencybeacon.com
  baseURL: https://api.currencybeacon.com/v1
  tags:
  - Conversion
  tags_raw:
  - conversion
  properties:
  - type: OpenAPI
    url: openapi/currencybeacon-conversion-api-openapi.yml
  - type: Documentation
    url: https://currencybeacon.com/api-documentation
- aid: currencybeacon:currencybeacon-currencies-api
  name: CurrencyBeacon Currencies API
  description: Supported currencies information
  humanURL: https://currencybeacon.com
  baseURL: https://api.currencybeacon.com/v1
  tags:
  - Currency
  tags_raw:
  - currencies
  properties:
  - type: OpenAPI
    url: openapi/currencybeacon-currencies-api-openapi.yml
  - type: Documentation
    url: https://currencybeacon.com/api-documentation
- aid: currencybeacon:currencybeacon-rates-api
  name: CurrencyBeacon Rates API
  description: Currency exchange rate operations
  humanURL: https://currencybeacon.com
  baseURL: https://api.currencybeacon.com/v1
  tags:
  - Rates
  tags_raw:
  - rates
  properties:
  - type: OpenAPI
    url: openapi/currencybeacon-rates-api-openapi.yml
  - type: Documentation
    url: https://currencybeacon.com/api-documentation
common:
- type: AgenticAccess
  url: agentic-access/currencybeacon-agentic-access.yml
- type: DomainSecurity
  url: security/currencybeacon-domain-security.yml
- type: Authentication
  url: authentication/currencybeacon-authentication.yml
- type: Website
  url: https://currencybeacon.com
- type: Documentation
  url: https://currencybeacon.com/api-documentation
- type: GitHubOrg
  url: https://github.com/currencybeacon
- type: Pricing
  url: https://currencybeacon.com/pricing
- type: StatusPage
  url: https://status.currencybeacon.com
- type: X
  url: https://x.com/currencybeacon
- type: Plans
  url: plans/currencybeacon-plans-pricing.yml
- type: RateLimits
  url: rate-limits/currencybeacon-rate-limits.yml
- type: FinOps
  url: finops/currencybeacon-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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