Error 429 while using HF Spaces

I’m getting HTTP 429 errors when my Space calls another Space, and I can’t figure out why. Every request from the Space fails with a 429 error. The response is Hugging Face’s HTML page saying “We had to rate limit you”. Are requests from one Space to another Space’s *.hf.space URL are limited? Thanks for any help!

nootxlm 2

The HTML page is the tell: that is the edge rate limiter, not the Space you are calling. Space-to-Space traffic leaves through shared egress, so you are likely tripping a per-IP limit that has nothing to do with your target. Check the Retry-After header on the 429 and space your calls out. If it is consistent, the fix is usually fewer batched requests, not retrying harder.