Signaturely for AI agents

Signaturely is an electronic signature platform for sending, signing, and organizing documents online with templates and team access. Small businesses use it to close signed agreements without paper. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect Signaturely See the 9 actions ↓

DocumentsAPI keyMCP + RESTsignaturely.com

AUDIT LOG · SIGNATURELYPOLICY: acme-support

09:41:07 · claude · u_8f2read

signaturely.list_folders

List Folders✓ allowed · 212ms

09:41:08 · claude · u_8f2read

signaturely.get_folder

Get Folder✓ allowed · 164ms

09:41:09 · claude · u_8f2write

signaturely.create_folder

Create Folder✓ approved · approved by user

EVERY SIGNATURELY CALL, ON THE RECORD

01 · USE CASES

What agents do in Signaturely.

Search before creating a duplicate

Search existing templates and documents before starting a new one, avoiding a duplicate request.

Organize signed documents into folders

Create or rename a folder to keep signed contracts organized by client or deal.

Check who can sign

List team members to confirm who has signing access before routing a document to them.

02 · ACTIONS

9 Signaturely actions, graded by risk.

Every Signaturely action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

Look things up. Allowed by default.

signaturely.get_folder
Get Folder
signaturely.list_folders
List Folders
signaturely.list_documents
List Documents
signaturely.get_current_user
Get Current User
signaturely.list_team_members
List Team Members
signaturely.get_recent_document
Get Recent Document
signaturely.search_templates_documents
Search Templates or Documents

write

Create and change things. Allow, or ask the user first.

signaturely.create_folder
Create Folder
signaturely.rename_folder
Rename Folder

destructive

Delete, cancel or archive. Ask first, or deny outright.

No destructive actions.

03 · HOW IT WORKS

Signaturely in three steps.

01Your users connect SignaturelyThey add their Signaturely api key on Arc0 Connect, under your brand. It goes straight into the vault.
02You set the rulesReads run, and writes like “create Folder” can wait for the user to approve.
03Any agent can actYour agent calls Signaturely through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.

POLICY.TS

await arc0.policies.set('signaturely', {
  read: 'allow',
  write: 'ask',        // create_folder
  destructive: 'deny',  
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2

04 · AUTH AND DATA

How Signaturely connects.

Users add their Signaturely api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Signaturely connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH: API key
CREDENTIALS: Per-tenant encrypted vault
MODEL SEES: Results only, never credentials
AUDIT LOG: Every call, on every plan

05 · WORKS WITH

Use Signaturely from any agent.

Claude

ChatGPT

Cursor

Codex

VS Code

OpenAI Agents SDK

Claude Agent SDK

Vercel AI SDK

Mastra

LangGraph

06 · RELATED

Signaturely and Arc0, answered.

Q01

Can I use Signaturely with Claude, ChatGPT or Cursor?

Yes. Connect Signaturely to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Signaturely actions you allow.

Q02

How do users connect Signaturely?

Users add their Signaturely api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Signaturely actions can my agent take?

9 in total: 7 read, 2 write and 0 destructive, such as “create Folder”. Your policies decide which of them each agent may call.

Q04

Can I make my agent read-only in Signaturely?

Yes. Allow read actions and deny writes in the Signaturely policy. Your agent can still look things up, and any write it attempts is blocked and logged.

Q05

Can my own backend call Signaturely too?

Yes. The same Signaturely connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Signaturely into your agent.

Your users connect Signaturely once, under your brand. Your agent gets 9 actions behind your policies, with every call on the record.

Connect Signaturely Browse all apps →

Free to build · MCP + REST · Audit log on every plan