Rate limits
Per-key, per-address, per-workspace, per-IP.
Defaults
- API key: 600 requests / minute
- Workspace: plan-dependent daily message-receive cap
- Address: 60 messages received / minute (burst)
- Public inbox creation per IP: 30 / hour
Response headers
X-RateLimit-Limit: 600 X-RateLimit-Remaining: 587 X-RateLimit-Reset: 1735689600
429 handling
Back off using the Retry-After header. SDKs do this automatically with exponential jitter.