edit_pdf

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Modify an existing PDF: fill AcroForm fields by name, stamp text at absolute coordinates, or paint opaque boxes over regions. Operations apply in the order given, to either a render you own (renderId) or a PDF Kamy downloads from a public URL (pdfUrl) — supply exactly one. Use this when a document already exists and needs values or marks; use render_pdf when the document should be generated from a template instead. Nothing is overwritten: the source is untouched and the result is a NEW render whose id feeds directly into create_signature_request, create_envelope, merge_pdfs or split_pdf. Coordinates are PDF points with the origin at the BOTTOM-left. AcroForm values are flattened by default so they cannot be edited after signing. 'cover' paints an opaque rectangle over the region — it hides content visually but does NOT delete the underlying bytes, and the response carries a COVER_VISUAL_ONLY warning for every cover op. Anyone can still copy the text out from under the box. It is NOT redaction: never use it to hide secrets or personal data in a document you are about to hand out, and do not describe the result as redacted. There is no redaction operation — 'op: redact' is rejected with REDACTION_NOT_SUPPORTED. To remove sensitive data, regenerate the document without it. Returns { id, url, bytes, durationMs, name, warnings } — always read warnings, since out-of-range pages and unmatched field names are reported there rather than failing the call. Requires a Kamy API key with the `render` scope; without a key, returns dashboard setup instructions.