Document to Markdown (auto-detect): Convert any document to Markdown with automatic format detection. One endpoint for pdf, docx, pptx, xlsx, csv, epub, html and plain text — provide a URL or base64 bytes and the type is detected from the file contents. Spreadsheets return both a Markdown table and a JSON array of rows. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/document_to_markdown.

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