Everything you need from a rates API

Fast, well-documented and built to stay out of your way — from a weekend project to production fintech.

Comprehensive coverage of world currencies with names, symbols and decimal metadata, refreshed every hour from trusted upstream sources.

Convert any amount between any two currencies. Cross-rates resolve through the USD pivot, so even GBP→JPY works.

Look up rates for a past date for statements, reconciliation and reporting (Pro plan and above).

Top coins by market cap with 24h change via /crypto — same key, same response envelope (Pro+).

Pick the format that fits your stack with ?format=. Responses ≥1KB are gzip-compressed automatically.

Every response carries X-RateLimit-Limit/Remaining/Reset; 429s include Retry-After. Track usage at /usage and /quota.

One key — in the URL path or a header. Keys are stored hashed and encrypted at rest.

Cached, edge-friendly responses with ETag/304 support and a public /health endpoint.

Legacy, v1 and v2 URLs all keep working — integrations never break on an upgrade.

Official PHP, JavaScript and Python clients, plus an MCP server so AI tools can query rates directly.