generated: '2026-09-09'
method: searched
source: https://derrick-app.com/.well-known/mcp/server-card.json
note: >-
  Published in the machine-readable MCP server card (rate_limits block) and echoed by the
  derrick-mcp package's error guidance (429 RATE LIMIT, "60 req/min exceeded", not charged).
  No rate-limit response headers (X-RateLimit-*, RateLimit-*, Retry-After) are documented;
  the runtime signal is the 429 status code alone.
limit_count: 1
limits:
  - scope: per-key (all paid plans)
    window: 1 minute
    limit: 60
    burst: null
    applies_to: REST API and MCP server
    exhaustion_status: 429
    charged_on_429: false
    response_headers: []
    guidance: 'Provider-recommended backoff: exponential with jitter on 429, initial delay 2s, max delay 60s.'