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Playground

Paste a FEN. Without a key you get depth 10 and 10 requests an hour; with a free key, depth 14 and 2,000 units a day.

Response appears here.

Get a key from here

curl -X POST https://stockfishapi.com/v1/signup \
  -H "Content-Type: application/json" \
  -d '{"email":"you@example.com"}'