Error 429 while using HF Spaces

Hugging Face Spaces users are receiving HTTP 429 errors with the HTML page "We had to rate limit you" when one Space calls another Space's *.hf.space URL, according to a Hugging Face forum thread. Forum user nootxlm attributed the failures to the platform's edge rate limiter rather than the target Space, noting that Space-to-Space traffic leaves through shared egress and likely trips a per-IP limit. The recommended fix is to check the Retry-After header on the 429 and space calls out, typically by batching fewer requests rather than retrying harder.

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 https://discuss.huggingface.co/u/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.