Walnut Rate Limits

Walnut publishes explicit per-key rate limits for the Customer Data API: 50 requests/second sustained, 100 requests/second burst, and a row cap per request. Exhaustion returns 429 and the only remediation guidance is exponential backoff. What Walnut does NOT publish is any runtime signal — no RateLimit-*, no X-RateLimit-*, and no Retry-After — so a client has to infer its position against the limit from the numbers in the docs rather than read it off the response. The row cap is stated inconsistently across two Walnut pages and that conflict is recorded, not resolved.