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SignatureAPI (BYOK) — connector documentation

  • MCP endpoint: https://byok-signatureapi.connectorbay.com/mcp
  • REST API: POST https://byok-signatureapi.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://byok-signatureapi.connectorbay.com/openapi.json
  • Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
  • Authentication: your own SignatureAPI SignatureAPI API key (Dashboard > API keys; test or live), sent in the X-Upstream-Key header of every request (never stored, logged or cached)
  • Health: https://byok-signatureapi.connectorbay.com/health · Tool schemas: https://byok-signatureapi.connectorbay.com/tools.json
  • Publisher: Unify Dynamics LLC · connectorbay.com/byok-signatureapi · agent@connectorbay.com

What SignatureAPI (BYOK) is for

SignatureAPI (BYOK) lets an AI assistant read your own SignatureAPI data through the SignatureAPI API with a key you supply (SignatureAPI API key (Dashboard > API keys; test or live)). Read-only: 8 tools (list_envelopes, get_envelope, list_events, list_envelope_events, list_envelope_deliverables, get_deliverable, get_upload, get_upload_structure). The BYOK key travels with each request, is used for that one call only and is never stored, logged or cached; it is only ever sent to api.signatureapi.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by SignatureAPI. SignatureAPI and its logos are trademarks of their owners and are used only to say which service the connector works with.

Ask your assistant things like:

  • "Which SignatureAPI envelopes are still in progress?"
  • "What is the status of SignatureAPI envelope env_3Xk9aBcD?"
  • "What happened recently in my SignatureAPI account?"
  • "What is the event history of SignatureAPI envelope env_3Xk9aBcD?"
  • "Has the signed PDF of SignatureAPI envelope env_3Xk9aBcD been generated?"
  • "What is the status of SignatureAPI deliverable del_5TgH7wQe?"

What it does

  • list_envelopes: List envelopes newest first with status, mode, routing, language, topics and created and completed times (documents, recipients and sender details are not returned).
  • get_envelope: Get one envelope's status, mode, routing, language, topics and created and completed times (documents, recipients and sender details are not returned).
  • list_events: List account-wide events newest first (envelope, recipient and deliverable lifecycle) with type, timestamp and object ids; envelope metadata is not returned.
  • list_envelope_events: List the events of one envelope newest first with type, timestamp and object ids.
  • list_envelope_deliverables: List the deliverables (signed PDF outputs) of one envelope with type, status, language and generation times (download URLs and passwords are not returned).
  • get_deliverable: Get one deliverable's type, status, language and generation times (the download URL and password are not returned).
  • get_upload: Get an uploaded file's retention type, permanent key, format, size and timestamps (the internal URL is not returned).
  • get_upload_structure: Get the analyzed structure of an uploaded file: format, page count and detected placeholder keys.

BYOK key

You bring your own SignatureAPI SignatureAPI API key (Dashboard > API keys; test or live) (https://signatureapi.com/docs/api/guides/quickstart). Your assistant sends it in the X-Upstream-Key header with each request. ConnectorBay uses it for that one call only: it is never stored, logged or cached, never shown in an answer, and it is only sent to api.signatureapi.com over https, with no redirects followed. Create a key with the fewest permissions the tools need (read-only if the provider offers it), and revoke it at the provider whenever you like.

Data sources

Live from the SignatureAPI API (api.signatureapi.com) with a BYOK key; documentation: https://signatureapi.com/docs/api/openapi. Endpoints checked against that documentation on 2026-10-16.

What it is not

Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by SignatureAPI. SignatureAPI and its logos are trademarks of their owners and are used only to say which service the connector works with. It is read-only: it never creates, changes, sends or deletes anything in your SignatureAPI account.

Built for: Worldwide. Languages: English.