# Fixer

**Canonical:** https://apis.io/providers/fixer/  
**Website:** https://fixer.io  
**APIs profiled:** 5

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.

## Kin Score — 52.9 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 52.9).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 72.0 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 2.6 |
| Developer Ergonomics | 39.3 |
| Commercial Clarity | 77.6 |
| Access Clarity | 77.6 |

## Agent readiness — 34.7 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (5)

- **Fixer Conversion API** — On-demand currency amount conversion.
- **Fixer Fluctuation API** — Currency fluctuation analysis between two dates.
- **Fixer Rates API** — Real-time and historical foreign exchange rate operations.
- **Fixer Symbols API** — Discovery of supported currency symbols.
- **Fixer Time Series API** — Daily historical rates between two dates.

## Agentic access (1)

- **Fixer Agentic Access** — 6 operations

## Security (2)

- **Fixer Authentication** — apiKey · 1 scheme
- **Fixer Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Fixer Plans Pricing**

## Use cases (6)

- **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.

## Tags

Currency Exchange, Foreign Exchange, FX, Forex, ECB, Conversion, Historical Rates, Time Series, Fluctuation, APILayer, Public APIs

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/fixer/). Scores are computed from the provider's own public artifacts under a published rubric.