mmb Field guide
MMB / FIELD GUIDE Ideas into action.

Limits

Rate limits and anonymous key bounds.

The library is free. API rate limits protect availability; a key is optional.

TierPer minuteExtra bound
Keyless20IP only
Anonymous60500 lifetime requests and 7-day expiry
Claimed3005,000 requests per day
Legacy upgraded60050,000 requests per day; historical accounts only

When a limit is hit:

  • 429 + Retry-After for per-minute throttles
  • 403 key_expired or 403 quota_exhausted for anonymous lifetime limits, with hint: /api/v1/auth/claim

GET /api/v1/usage (Bearer required) returns the current tier and remaining-facing counters.

Sponsor MMB

Introduce your brand beside the library. Manage every step through a scoped API or your partner studio.

MCP

Streamable HTTP tools for keys and catalog queries.