BiGapiguides
POST /v1/pdf/unlock · 1 cent per operation

Unlock PDF

Remove a PDF password: decrypt a protected PDF (requires the correct password; a wrong password returns 422 wrong_password). A file without password comes back unchanged and free.

Try it

curl -X POST https://api.bigapi.dev/v1/pdf/unlock -H 'Authorization: Bearer $KEY' -F 'file=@protected.pdf' -F 'password=secret123' -o unlocked.pdf

New keys come with 100 free operations, no signup: curl -X POST https://api.bigapi.dev/v1/keys. Failed calls cost nothing.

Parameters

NameMeaning
file requiredPassword-protected PDF to open up.
password requiredThe password of the PDF. A wrong password returns HTTP 422 wrong_password and costs nothing. If the PDF has no password, it is returned unchanged, not charged, with a warning.

Result and price

1¢ · 1 cent per operation

Returns application/pdf. Response headers carry the cost (X-BigAPI-Cost) and notes about your input (X-BigAPI-Warnings).

From an agent (MCP)

Connect BiGapi as an MCP server: https://api.bigapi.dev/mcp (hosted) or npx -y @bigapi/mcp (local). Then ask in plain words; the agent finds pdf_unlock on its own.