Rate limits

Fender uses a two-layer limit: a short burst window plus a daily quota for accounts.

Caller	Burst limit	Daily quota
Anonymous (per IP)	10 req / min	—
API key — Free	30 req / min	500 / day
API key — Pro	600 req / min	200,000 / day

Free tiers are meant for trying the API and light use; upgrade to Pro for production traffic.

Headers

Authenticated responses include your remaining daily quota:

X-RateLimit-Limit: 500
X-RateLimit-Remaining: 494

When you hit a limit

You get HTTP 429 with a JSON body:

{
  "error": "rate_limited",
  "message": "Anonymous rate limit reached (10 requests/min). Create a free API key for higher limits."
}

Back off and retry, or create an API key for higher limits. Need more than the Pro quota? Get in touch.