Documentation
Rate limits and quotas
Two independent limits, both reported on every successful response.
Two limits
A per-minute rate limit protects burst capacity and is evaluated per API key. A monthly request quota governs billing and is evaluated per subscription. Exhausting either answers 429, but with a different error code so you can react correctly.
Response headers
Headers
X-RateLimit-Limit: 600
X-RateLimit-Remaining: 594
X-Monthly-Limit: 100000
X-Monthly-Usage: 12480
X-Monthly-Remaining: 87520Plan limits
| Plan | Requests / month | Requests / minute | API keys |
|---|---|---|---|
| Free | 5,000 | 20 | 1 |
| Developer | 50,000 | 60 | 3 |
| Startup | 250,000 | 300 | 10 |
| Business | 1,000,000 | 1,000 | 25 |
| Scale | 5,000,000 | 5,000 | 100 |
Poll the base, not the pair
One /v1/rates call returns every quoted currency against your base. Fetching the full table once a minute costs one request; fetching forty pairs individually costs forty.