⚠️ This performs a consequential, possibly irreversible action (legally-binding signature request and/or quota consumption). Confirm with the human before calling. Create a single-signer "express" signing (or action-authentication) session and return its IDs plus a ready-to-share signingUrl (url + embed token). Consumes signature quota.

Poll the current status of a signing session (ACTIVE/COMPLETED/CANCELLED/EXPIRED/FAILED).

Get full bootstrap data for a signing session (signer, steps, document, appearance).

List signing sessions filtered by status, with cursor pagination.

⚠️ This performs a consequential, possibly irreversible action (legally-binding signature request and/or quota consumption). Confirm with the human before calling. Cancel an active signing session. This cannot be undone.

Resend the OTP challenge for a signing session, optionally over a specific channel (email/sms).

⚠️ This performs a consequential, possibly irreversible action (legally-binding signature request and/or quota consumption). Confirm with the human before calling. Create a multi-signer envelope around one PDF. After creating, add each signer with add_session_to_envelope. Consumes quota.

Get envelope details including per-signer session summaries and completion counts.

⚠️ This performs a consequential, possibly irreversible action (legally-binding signature request and/or quota consumption). Confirm with the human before calling. Add a signing session for one signer to an envelope. Returns IDs plus a ready-to-share signingUrl.

Generate the combined stamped PDF (all signers) for a COMPLETED envelope and return a download URL.

Upload a base64-encoded PDF to an existing transaction (≤10MB inline; use presign for larger).

Get presigned download URLs for a transaction’s document and signed artifacts.

Search transactions by status, signer external ID, document group, or date range (cursor pagination). Use this to find a transaction or check signing history.

Get full details of a single transaction, including its steps and results.

⚠️ This performs a consequential, possibly irreversible action (legally-binding signature request and/or quota consumption). Confirm with the human before calling. Cancel a low-level transaction. This cannot be undone.

Retrieve the cryptographic evidence (hashes, step proofs, evidenceId) for a completed transaction.

Publicly verify a completed signature by its evidenceId. Returns status, document/evidence hashes, steps and signer display info. No authentication needed.

Publicly verify all signers of an envelope and get consolidated download URLs.

⚠️ This performs a consequential, possibly irreversible action (legally-binding signature request and/or quota consumption). Confirm with the human before calling. Inspect an uploaded PDF for embedded electronic/digital signatures. Requires PRODUCTION credentials + the verification:write scope and CONSUMES verification quota. Not available in HML.

Register an HTTPS endpoint to receive event notifications. The response returns a signing secret — store it to verify the HMAC-SHA256 signature on incoming payloads.

List all registered webhooks for the tenant.

⚠️ This performs a consequential, possibly irreversible action (legally-binding signature request and/or quota consumption). Confirm with the human before calling. Delete a registered webhook. Event delivery to it stops immediately.

Send a sample payload to a registered webhook and return the delivery result.

Get a one-time drag-and-drop upload page URL to give the user so they can upload a PDF directly to SignDocs (file bytes never pass through the chat). Use this when the document is a local file or a private Google Drive file — the user downloads it and drops it on the page. After they confirm the upload, pass the returned uploadToken to create_signing_session, create_envelope, or upload_document.