↗ · Guides & reference
Documentation
Last updated · 2026-06-02
Short, practical guides for getting documents signed with Sign Sail. Start with field tags if you upload PDFs by hand; reach for the API if you want a script or an agent to do the work.
Document field tags
Type a short tag where a signature, date, or text field should go, and Sign Sail places it for you on upload. No dragging boxes around.
Read →Prefill fields & signers
Fill in your own fields before a document goes out, and give each signer a name. Your entries are baked in before anyone signs.
Read →API & MCP
Upload, place fields, send, and download signed PDFs over HTTP, or connect an agent to the MCP server. Business plan.
Read →