# Open Exchange Rates

**Canonical:** https://apis.io/providers/openexchangerates/  
**Website:** https://openexchangerates.org  
**APIs profiled:** 7

Open Exchange Rates provides a simple, reliable REST API for live and historical foreign exchange (forex) rates covering 200+ world currencies, with end-of-day historical data back to January 1st, 1999. The JSON API delivers latest rates, historical snapshots, bulk time-series, currency conversion, and OHLC data, authenticated with a per-account App ID and priced in published monthly tiers that start with a free plan.

## Kin Score — 50.7 / 100 (developing)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 50.7).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 60.7 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 50.0 |
| Developer Ergonomics | 31.0 |
| Commercial Clarity | 71.1 |
| Access Clarity | 71.1 |

## Agent readiness — 28.7 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | verified |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

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

## APIs (7)

- **Open Exchange Rates Convert API** — Convert a value between two currencies at the latest rates.
- **Open Exchange Rates Currencies API** — List of supported currency symbols and names.
- **Open Exchange Rates Historical Rates API** — End-of-day rates for any date back to 1999-01-01.
- **Open Exchange Rates Latest Rates API** — Current exchange rates relative to a base currency.
- **Open Exchange Rates OHLC API** — Open, high, low, close, and average rates for a period.
- **Open Exchange Rates Time Series API** — Bulk daily historical rates for a date range.
- **Open Exchange Rates Usage API** — Account plan and usage statistics.

## Agentic access (1)

- **Openexchangerates Agentic Access** — 7 operations

## Security (2)

- **Openexchangerates Authentication** — apiKey · 2 schemes
- **Openexchangerates Domain Security** — TLSv1.2 · HSTS · DMARC

## Plans (1)

- **Openexchangerates Plans Pricing**

## Tags

Foreign Exchange, Currency, Exchange Rates, FX, Currency Conversion, Forex, Financial Data

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