429 · Too many requests
type: https://tennisapi.dev/docs/errors/http-429
What it means
Your plan's per-minute rate or monthly quota is used up.
How to fix it
Wait for the time in the Retry-After header; X-RateLimit-Remaining and X-RateLimit-Reset show the budget. Conditional requests (If-None-Match) answered 304 are the cheapest way to poll.