Rate limits

• Fair-use limit: 600 requests per minute per client IP across /api, /mcp and /a2a, with short bursts tolerated. Discovery files (/llms.txt, /openapi.json, /.well-known/*, Markdown pages) are cacheable and not counted strictly.
• Headers on API responses: X-RateLimit-Limit, X-RateLimit-Remaining (approximate), X-RateLimit-Reset (Unix seconds).
• When exceeded: HTTP 429 with Retry-After (seconds) and a JSON error RATE_LIMITED (retryable: true, retry_after_seconds).
• Results are deterministic: cache them client-side (cache.cacheable), and batch related calculations by following next_actions instead of polling.
• Heavy or commercial use: the service is free; contact via https://tttkmbb.com/docs if you need more than the fair-use limit.

Markdown source: /docs/rate-limits.md