Upload a PDF and send it to up to 25 signers or approvers, plus up to 25 view-only and 25 CC recipients. Give the file as an https URL (file_url) or base64 (file_base64). Optionally place signature/initials/date/text boxes with fields; without fields, signers sign on a certificate page appended to the PDF. Returns the document with each signer's private signing_url and what the send cost. Counts as one billable unit.

Status, signers (viewed/signed times), download links, and the event history of one document you sent.

Your most recent documents, optionally filtered by status: sent, completed, declined, voided, expired (a sent document whose date has passed reads expired).

Re-send the signing link to everyone who has not signed yet. At most once an hour per document. An expired document cannot be reminded; use extend_document.

Give an expired document a new signing deadline 14 days out, put it back to sent, and send a fresh link to everyone who has not signed (signers-in-order: only the current stage). Signatures already collected stay. Free.

Withdraw an open document so nobody can sign it. Within 10 minutes of sending the billable unit is refunded.

Prepaid balance, documents used this month, free documents left, the price of the next document, and the projected run-out.

The evidence package for a document: SHA-256 of the original and signed PDFs, every signer and event with its position in Signathing's public hash-chained evidence log, and the recipe to verify it independently.

Saved templates (a PDF with placed fields and named signer roles; approver_slots lists roles that approve instead of sign) and their direct links. Use send_from_template to send one.

Create and send a document from a saved template. Give one signer per role, in role order or with an explicit 0-based slot. Counts as one billable unit like send_document.

Look up the verification code stamped beside any Signathing signature and return the signing record it belongs to. Works for any document, not only yours.