Open Settings → API keys, generate a key, and store it as PDFCRAFT_API_KEY. Free tools are key-less; AI tools require a key.
Run a summarize: `curl -X POST https://api.pdfcraftai.com/v1/summarize -H 'Authorization: Bearer $PDFCRAFT_API_KEY' -F file=@/path/to/file.pdf`. The response includes a signed URL to the summary, valid for 60 minutes.
Official SDKs ship for Node and Python. The Node SDK auto-retries 429s with backoff; the Python SDK supports both sync and asyncio.