Fixer

Fixer is a lightweight JSON API for real-time and historical foreign exchange rates and currency conversion. Built on top of European Central Bank reference rates and 15+ additional data sources, Fixer supports 170+ world currencies and is delivered through the APILayer marketplace under a freemium subscription model.

Fixer publishes 5 API contracts indexed on the APIs.io network, including Conversion API, Fluctuation API, Rates API, and 2 more. Tagged areas include Foreign Exchange, ECB, Conversion, Historical Rates, and Time Series.

The Fixer catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Fixer’s developer surface includes authentication, documentation, API reference, pricing, signup flow, support, engineering blog, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

54.2/100 developing ▬ flat Agent 24/100 agent aware Front door AI 1/6 silent open core · MIT Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 9 Features 6 Use Cases

Foreign Exchange ECB Conversion Historical Rates Time SeriesFluctuationAPILayer Public APIs

What this lets a business do 1

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

Data & Reference Information Services

AE-230

ConversionFluctuationRatesTime Series

GET /latest GET /{date} GET /convert GET /fluctuation

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 54.2/100 · developing

Contract Quality 14.3 / 21

Developer Ergonomics 8.1 / 17

Access Clarity 13.2 / 17

Operational Transparency 0.3 / 11

Contract Governance 2.8 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 24/100 · 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
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
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)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

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

Operational Transparency scores 2.6 — up to +12.7 composite points
Developer Ergonomics scores 47.6 — up to +10.5 composite points
Contract Governance scores 27.3 — up to +8.7 composite points

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.

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/fixer/apis.yml: open an issue on github.com/api-evangelist/fixer 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
RegTech, AML/KYC and Money Transmission	long-tail	5.0 (thin)	-	-

OPEN COLLECTION

Fixer API

OPEN COLLECTION

Fixer API pricing

Prices published by Fixer, read 2026-10-28 from fixer.io/pricing.

Plan	Price
FREE	$0 Includes: 100 API Calls / mo
BASIC	$14.99 Includes: 10,000 API Calls / mo
PROFESSIONAL	$59.99 Includes: 100,000 API Calls / mo
PROFESSIONAL PLUS	$99.99 Includes: 500,000 API Calls / mo
ENTERPRISE	Custom Pricing Includes: Volume API Calls / mo

Plan details, limits and sources →

Billed by: api calls · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Fixer Plans Pricing

5 plans

PLANS

Fixer Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Fixer Rate Limits

0 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Fixer

SLA

FinOps 1

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

Fixer Finops

FINOPS

Features 9

Notable capabilities this provider offers.

170+ World Currencies

Coverage of fiat currencies, sourced from the European Central Bank and 15+ additional providers.

Real-Time Exchange Rates

Latest rates with refresh cadence ranging from hourly (Free) to 60 seconds (Professional Plus, Enterprise).

Historical Exchange Rates

End-of-day rates for any working day since 1999-01-04, available on every plan including Free.

Currency Conversion Endpoint

On-demand conversion between any two currencies at real-time or historical rates.

Time Series Endpoint

Daily rates between two arbitrary dates (max 365 days) for trend analysis.

Fluctuation Endpoint

Start rate, end rate, absolute change, and percentage change for a chosen window.

HTTPS Encryption

SSL-secured transport on Basic plan and above; Free is HTTP only.

Source Currency Switching

Choose any of the 170+ symbols as the base currency on Basic plan and above.

APILayer Unified Auth

One APILayer `apikey` works across Fixer and other APILayer marketplace APIs.

Scroll for all 9

Semantic Vocabularies 1

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

Fixer Context

9 classes · 20 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Fixer — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

Fixer API Rules

12 rules · 4 errors 8 warnings

SPECTRAL

6 properties

JSON SCHEMA

EXAMPLE

Security Posture 2

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

Fixer Authentication

apiKey · 1 scheme

SECURITY

Fixer Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Fixer Agentic Access

6 operations

6 operations · 0 acting

AGENTIC

Use Cases 6

What developers build with this provider.

E-Commerce Multi-Currency Pricing

Convert prices into the shopper's local currency at checkout using /convert.

Treasury and Cash Reporting

Daily mark-to-market of multi-currency balances using /timeseries and /fluctuation.

Travel and Fintech Apps

Power in-app FX widgets, traveler wallets, and remittance quotes with /latest.

Accounting and Ledger Reconciliation

Look up the official end-of-day rate for any historical transaction with /{date}.

Backtesting and Analytics

Pull windowed rate history with /timeseries to feed quant or BI models.

Compliance and Audit Trails

Reference an immutable ECB-sourced rate when auditing cross-border payments.

Integrations 6

Pre-built integrations with other platforms and tools.

APILayer Marketplace

Fixer is distributed via the APILayer hub; signup, billing, and key management share the marketplace.

European Central Bank

Primary upstream data source for daily reference exchange rates.

money.js

Client-side JavaScript library historically paired with Fixer for browser-side conversion.

Currencylayer

Sister APILayer product with similar FX surface; often used interchangeably or for redundancy.

Coinlayer

Cryptocurrency exchange rate API on the same APILayer platform.

Currencyfreaks / Open Exchange Rates

Competing FX APIs that consumers benchmark Fixer against.

Solutions 5

Packaged solutions this provider offers.

Free Plan

100 requests/month, hourly refresh, EUR base only, HTTP only. Best for prototyping.

Basic Plan

10,000 requests/month at $14.99/mo, HTTPS, source currency switching, /convert endpoint.

Professional Plan

100,000 requests/month at $59.99/mo, 10-minute refresh, /timeseries endpoint.

Professional Plus Plan

500,000 requests/month at $99.99/mo, 60-second refresh, /fluctuation endpoint.

Enterprise Plan

Custom volume, 60-second refresh, dedicated account team and priority support.

Resources

Get Started 2

Portal, sign-up, and the first successful call

Signup

Signup

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

SpectralRules

SpectralRules

Vocabulary

Vocabulary

Build 3

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 6

Pricing, plans, and the legal terms of use

License

Pricing

TermsOfService

PrivacyPolicy

Plans

FinOps

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

PublicAPIsListing

PublicAPIsListing

Source (apis.yml)

aid: fixer
name: Fixer
description: Fixer is a lightweight JSON API for real-time and historical foreign exchange rates and currency conversion.
  Built on top of European Central Bank reference rates and 15+ additional data sources, Fixer supports 170+ world currencies
  and is delivered through the APILayer marketplace under a freemium subscription model.
url: https://fixer.io
deliveryModel:
  model: open-core
  license: MIT
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - 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: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-05-28'
modified: '2026-05-29'
x-source: public-apis/public-apis
x-category: Currency Exchange
x-type: company
x-tier: 3
x-tier-reason: bulk-registered-from-public-apis
x-parent: apilayer
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fixer.png
x-docs-platform: stoplight
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
tags:
- Foreign Exchange
- ECB
- Conversion
- Historical Rates
- Time Series
- Fluctuation
- APILayer
- Public APIs
tags_raw:
- Currency Exchange
- Foreign Exchange
- FX
- Forex
- ECB
- Conversion
- Historical Rates
- Time Series
- Fluctuation
- APILayer
- Public APIs
apis:
- aid: fixer:fixer-conversion-api
  name: Fixer Conversion API
  description: On-demand currency amount conversion.
  humanURL: https://fixer.io/documentation
  baseURL: https://api.apilayer.com/fixer
  tags:
  - Conversion
  properties:
  - type: OpenAPI
    url: openapi/fixer-conversion-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: APIReference
    url: https://apilayer.com/marketplace/fixer-api
  - type: GettingStarted
    url: https://fixer.io/quickstart
  - type: Authentication
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: JSONSchema
    url: json-schema/fixer-rates-schema.json
  - type: JSONSchema
    url: json-schema/fixer-symbols-schema.json
  - type: JSONSchema
    url: json-schema/fixer-convert-schema.json
  - type: JSONSchema
    url: json-schema/fixer-timeseries-schema.json
  - type: JSONSchema
    url: json-schema/fixer-fluctuation-schema.json
  - type: JSONSchema
    url: json-schema/fixer-error-schema.json
  - type: JSONStructure
    url: json-structure/fixer-rates-structure.json
  - type: JSONStructure
    url: json-structure/fixer-symbols-structure.json
  - type: JSONStructure
    url: json-structure/fixer-convert-structure.json
  - type: JSONStructure
    url: json-structure/fixer-timeseries-structure.json
  - type: JSONStructure
    url: json-structure/fixer-fluctuation-structure.json
  - type: JSONLD
    url: json-ld/fixer-context.jsonld
  - type: Examples
    url: examples/fixer-getsymbols-example.json
  - type: Examples
    url: examples/fixer-getlatest-example.json
  - type: Examples
    url: examples/fixer-gethistorical-example.json
  - type: Examples
    url: examples/fixer-convertcurrency-example.json
  - type: Examples
    url: examples/fixer-gettimeseries-example.json
  - type: Examples
    url: examples/fixer-getfluctuation-example.json
  - type: RateLimits
    url: rate-limits/fixer-rate-limits.yml
  - type: Pricing
    url: plans/fixer-plans-pricing.yml
- aid: fixer:fixer-fluctuation-api
  name: Fixer Fluctuation API
  description: Currency fluctuation analysis between two dates.
  humanURL: https://fixer.io/documentation
  baseURL: https://api.apilayer.com/fixer
  tags:
  - Fluctuation
  properties:
  - type: OpenAPI
    url: openapi/fixer-fluctuation-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: APIReference
    url: https://apilayer.com/marketplace/fixer-api
  - type: GettingStarted
    url: https://fixer.io/quickstart
  - type: Authentication
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: JSONSchema
    url: json-schema/fixer-rates-schema.json
  - type: JSONSchema
    url: json-schema/fixer-symbols-schema.json
  - type: JSONSchema
    url: json-schema/fixer-convert-schema.json
  - type: JSONSchema
    url: json-schema/fixer-timeseries-schema.json
  - type: JSONSchema
    url: json-schema/fixer-fluctuation-schema.json
  - type: JSONSchema
    url: json-schema/fixer-error-schema.json
  - type: JSONStructure
    url: json-structure/fixer-rates-structure.json
  - type: JSONStructure
    url: json-structure/fixer-symbols-structure.json
  - type: JSONStructure
    url: json-structure/fixer-convert-structure.json
  - type: JSONStructure
    url: json-structure/fixer-timeseries-structure.json
  - type: JSONStructure
    url: json-structure/fixer-fluctuation-structure.json
  - type: JSONLD
    url: json-ld/fixer-context.jsonld
  - type: Examples
    url: examples/fixer-getsymbols-example.json
  - type: Examples
    url: examples/fixer-getlatest-example.json
  - type: Examples
    url: examples/fixer-gethistorical-example.json
  - type: Examples
    url: examples/fixer-convertcurrency-example.json
  - type: Examples
    url: examples/fixer-gettimeseries-example.json
  - type: Examples
    url: examples/fixer-getfluctuation-example.json
  - type: RateLimits
    url: rate-limits/fixer-rate-limits.yml
  - type: Pricing
    url: plans/fixer-plans-pricing.yml
- aid: fixer:fixer-rates-api
  name: Fixer Rates API
  description: Real-time and historical foreign exchange rate operations.
  humanURL: https://fixer.io/documentation
  baseURL: https://api.apilayer.com/fixer
  tags:
  - Rates
  properties:
  - type: OpenAPI
    url: openapi/fixer-rates-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: APIReference
    url: https://apilayer.com/marketplace/fixer-api
  - type: GettingStarted
    url: https://fixer.io/quickstart
  - type: Authentication
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: JSONSchema
    url: json-schema/fixer-rates-schema.json
  - type: JSONSchema
    url: json-schema/fixer-symbols-schema.json
  - type: JSONSchema
    url: json-schema/fixer-convert-schema.json
  - type: JSONSchema
    url: json-schema/fixer-timeseries-schema.json
  - type: JSONSchema
    url: json-schema/fixer-fluctuation-schema.json
  - type: JSONSchema
    url: json-schema/fixer-error-schema.json
  - type: JSONStructure
    url: json-structure/fixer-rates-structure.json
  - type: JSONStructure
    url: json-structure/fixer-symbols-structure.json
  - type: JSONStructure
    url: json-structure/fixer-convert-structure.json
  - type: JSONStructure
    url: json-structure/fixer-timeseries-structure.json
  - type: JSONStructure
    url: json-structure/fixer-fluctuation-structure.json
  - type: JSONLD
    url: json-ld/fixer-context.jsonld
  - type: Examples
    url: examples/fixer-getsymbols-example.json
  - type: Examples
    url: examples/fixer-getlatest-example.json
  - type: Examples
    url: examples/fixer-gethistorical-example.json
  - type: Examples
    url: examples/fixer-convertcurrency-example.json
  - type: Examples
    url: examples/fixer-gettimeseries-example.json
  - type: Examples
    url: examples/fixer-getfluctuation-example.json
  - type: RateLimits
    url: rate-limits/fixer-rate-limits.yml
  - type: Pricing
    url: plans/fixer-plans-pricing.yml
- aid: fixer:fixer-symbols-api
  name: Fixer Symbols API
  description: Discovery of supported currency symbols.
  humanURL: https://fixer.io/documentation
  baseURL: https://api.apilayer.com/fixer
  tags:
  - Symbols
  properties:
  - type: OpenAPI
    url: openapi/fixer-symbols-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: APIReference
    url: https://apilayer.com/marketplace/fixer-api
  - type: GettingStarted
    url: https://fixer.io/quickstart
  - type: Authentication
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: JSONSchema
    url: json-schema/fixer-rates-schema.json
  - type: JSONSchema
    url: json-schema/fixer-symbols-schema.json
  - type: JSONSchema
    url: json-schema/fixer-convert-schema.json
  - type: JSONSchema
    url: json-schema/fixer-timeseries-schema.json
  - type: JSONSchema
    url: json-schema/fixer-fluctuation-schema.json
  - type: JSONSchema
    url: json-schema/fixer-error-schema.json
  - type: JSONStructure
    url: json-structure/fixer-rates-structure.json
  - type: JSONStructure
    url: json-structure/fixer-symbols-structure.json
  - type: JSONStructure
    url: json-structure/fixer-convert-structure.json
  - type: JSONStructure
    url: json-structure/fixer-timeseries-structure.json
  - type: JSONStructure
    url: json-structure/fixer-fluctuation-structure.json
  - type: JSONLD
    url: json-ld/fixer-context.jsonld
  - type: Examples
    url: examples/fixer-getsymbols-example.json
  - type: Examples
    url: examples/fixer-getlatest-example.json
  - type: Examples
    url: examples/fixer-gethistorical-example.json
  - type: Examples
    url: examples/fixer-convertcurrency-example.json
  - type: Examples
    url: examples/fixer-gettimeseries-example.json
  - type: Examples
    url: examples/fixer-getfluctuation-example.json
  - type: RateLimits
    url: rate-limits/fixer-rate-limits.yml
  - type: Pricing
    url: plans/fixer-plans-pricing.yml
- aid: fixer:fixer-time-series-api
  name: Fixer Time Series API
  description: Daily historical rates between two dates.
  humanURL: https://fixer.io/documentation
  baseURL: https://api.apilayer.com/fixer
  tags:
  - Time Series
  properties:
  - type: OpenAPI
    url: openapi/fixer-time-series-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: APIReference
    url: https://apilayer.com/marketplace/fixer-api
  - type: GettingStarted
    url: https://fixer.io/quickstart
  - type: Authentication
    url: https://docs.apilayer.com/fixer/docs/api-documentation
  - type: JSONSchema
    url: json-schema/fixer-rates-schema.json
  - type: JSONSchema
    url: json-schema/fixer-symbols-schema.json
  - type: JSONSchema
    url: json-schema/fixer-convert-schema.json
  - type: JSONSchema
    url: json-schema/fixer-timeseries-schema.json
  - type: JSONSchema
    url: json-schema/fixer-fluctuation-schema.json
  - type: JSONSchema
    url: json-schema/fixer-error-schema.json
  - type: JSONStructure
    url: json-structure/fixer-rates-structure.json
  - type: JSONStructure
    url: json-structure/fixer-symbols-structure.json
  - type: JSONStructure
    url: json-structure/fixer-convert-structure.json
  - type: JSONStructure
    url: json-structure/fixer-timeseries-structure.json
  - type: JSONStructure
    url: json-structure/fixer-fluctuation-structure.json
  - type: JSONLD
    url: json-ld/fixer-context.jsonld
  - type: Examples
    url: examples/fixer-getsymbols-example.json
  - type: Examples
    url: examples/fixer-getlatest-example.json
  - type: Examples
    url: examples/fixer-gethistorical-example.json
  - type: Examples
    url: examples/fixer-convertcurrency-example.json
  - type: Examples
    url: examples/fixer-gettimeseries-example.json
  - type: Examples
    url: examples/fixer-getfluctuation-example.json
  - type: RateLimits
    url: rate-limits/fixer-rate-limits.yml
  - type: Pricing
    url: plans/fixer-plans-pricing.yml
common:
- type: CapabilityMap
  url: capabilities/fixer-capability-edges.yml
  name: Fixer Business Capability Map
- type: License
  name: MIT
  url: https://github.com/apilayer/fixer/blob/master/LICENSE
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/fixer/overview
- type: AgenticAccess
  url: agentic-access/fixer-agentic-access.yml
- type: DomainSecurity
  url: security/fixer-domain-security.yml
- type: Authentication
  url: authentication/fixer-authentication.yml
- type: Website
  url: https://fixer.io
- type: Documentation
  url: https://docs.apilayer.com/fixer/docs/api-documentation
- type: APIReference
  url: https://apilayer.com/marketplace/fixer-api
- type: Pricing
  url: https://fixer.io/product
- type: Signup
  url: https://apilayer.com/signup
- type: Login
  url: https://apilayer.com/login
- type: TermsOfService
  url: https://fixer.io/terms
- type: PrivacyPolicy
  url: https://fixer.io/privacy
- type: Support
  url: https://fixer.io/contact
- type: Blog
  url: https://blog.apilayer.com/
- type: GitHubOrganization
  url: https://github.com/apilayer
- type: GitHubRepository
  url: https://github.com/apilayer/fixer
- type: PublicAPIsListing
  url: https://github.com/public-apis/public-apis
- type: SpectralRules
  url: rules/fixer-rules.yml
- type: Vocabulary
  url: vocabulary/fixer-vocabulary.yml
- type: Plans
  url: plans/fixer-plans-pricing.yml
- type: RateLimits
  url: rate-limits/fixer-rate-limits.yml
- type: FinOps
  url: finops/fixer-finops.yml
- type: Features
  data:
  - name: 170+ World Currencies
    description: Coverage of fiat currencies, sourced from the European Central Bank and 15+ additional providers.
  - name: Real-Time Exchange Rates
    description: Latest rates with refresh cadence ranging from hourly (Free) to 60 seconds (Professional Plus, Enterprise).
  - name: Historical Exchange Rates
    description: End-of-day rates for any working day since 1999-01-04, available on every plan including Free.
  - name: Currency Conversion Endpoint
    description: On-demand conversion between any two currencies at real-time or historical rates.
  - name: Time Series Endpoint
    description: Daily rates between two arbitrary dates (max 365 days) for trend analysis.
  - name: Fluctuation Endpoint
    description: Start rate, end rate, absolute change, and percentage change for a chosen window.
  - name: HTTPS Encryption
    description: SSL-secured transport on Basic plan and above; Free is HTTP only.
  - name: Source Currency Switching
    description: Choose any of the 170+ symbols as the base currency on Basic plan and above.
  - name: APILayer Unified Auth
    description: One APILayer `apikey` works across Fixer and other APILayer marketplace APIs.
- type: UseCases
  data:
  - name: E-Commerce Multi-Currency Pricing
    description: Convert prices into the shopper's local currency at checkout using /convert.
  - name: Treasury and Cash Reporting
    description: Daily mark-to-market of multi-currency balances using /timeseries and /fluctuation.
  - name: Travel and Fintech Apps
    description: Power in-app FX widgets, traveler wallets, and remittance quotes with /latest.
  - name: Accounting and Ledger Reconciliation
    description: Look up the official end-of-day rate for any historical transaction with /{date}.
  - name: Backtesting and Analytics
    description: Pull windowed rate history with /timeseries to feed quant or BI models.
  - name: Compliance and Audit Trails
    description: Reference an immutable ECB-sourced rate when auditing cross-border payments.
- type: Integrations
  data:
  - name: APILayer Marketplace
    description: Fixer is distributed via the APILayer hub; signup, billing, and key management share the marketplace.
  - name: European Central Bank
    description: Primary upstream data source for daily reference exchange rates.
  - name: money.js
    description: Client-side JavaScript library historically paired with Fixer for browser-side conversion.
  - name: Currencylayer
    description: Sister APILayer product with similar FX surface; often used interchangeably or for redundancy.
  - name: Coinlayer
    description: Cryptocurrency exchange rate API on the same APILayer platform.
  - name: Currencyfreaks / Open Exchange Rates
    description: Competing FX APIs that consumers benchmark Fixer against.
- type: Solutions
  data:
  - name: Free Plan
    description: 100 requests/month, hourly refresh, EUR base only, HTTP only. Best for prototyping.
  - name: Basic Plan
    description: 10,000 requests/month at $14.99/mo, HTTPS, source currency switching, /convert endpoint.
  - name: Professional Plan
    description: 100,000 requests/month at $59.99/mo, 10-minute refresh, /timeseries endpoint.
  - name: Professional Plus Plan
    description: 500,000 requests/month at $99.99/mo, 60-second refresh, /fluctuation endpoint.
  - name: Enterprise Plan
    description: Custom volume, 60-second refresh, dedicated account team and priority support.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Fixer API — frequently asked questions

Does Fixer have an API?

Yes. APIs.io lists 5 APIs from Fixer, including Fixer Conversion API, Fixer Fluctuation API and Fixer Rates API, and 2 more.

Is there an OpenAPI specification for the Fixer API?

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

How do I authenticate with the Fixer API?

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

How much does the Fixer API cost?

Fixer publishes its prices; its FREE plan is $0 as of 2026-10-28. APIs.io lists 5 pricing plans for Fixer, with each plan's price, limits and inclusions under Pricing on this page.

Is the Fixer API ready for AI agents?

Fixer has a Kin Score of 54.2 out of 100 (developing) and an Agent Readiness score of 24.1 (agent-aware), scored by API Evangelist on 2026-11-06.

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