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How to connect Flexisign to Claude

Connect Claude Web, Desktop and Cowork to Flexisign MCP. Show all e-signature templates i can use, list templates for legal contracts, and more using natural language, with authentication handled for you.

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Flexisign is a privacy-first e-signature platform for sending, signing, and managing documents. It helps you streamline secure agreements with advanced privacy and audit controls.

1 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Flexisign account to Claude via Composio Connect, enabling it to show all e-signature templates I can use, list templates for legal contracts, find NDA templates in your account, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Flexisign with

OpenAI Agents SDKClaude Agent SDKClaude CodeCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Flexisign to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Flexisign account

Back in Claude, ask it to connect to Flexisign or give it any Flexisign-related task.

For example, ask Claude to:

  • "Show all e-signature templates I can use"
  • "List templates for legal contracts"
  • "Find NDA templates in your account"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Flexisign account is ready to use.

What is the Flexisign Claude Connector, and what's possible with it?

The Flexisign MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Flexisign account. It provides structured and secure access to your e-signature templates, so your agent can perform actions like listing document templates, surfacing available forms, and streamlining your e-signature workflow automatically.

  • Template discovery and listing: Quickly retrieve and display all available Flexisign templates directly through your agent.
  • Automated onboarding workflows: Let your agent surface the right template for onboarding, contracts, or agreements without manual searching.
  • Pre-signature document preparation: Enable your agent to fetch templates so you can prepare documents for signature faster.
  • Template-driven workflow automation: Use agent-powered discovery to launch automated processes based on the exact templates you need.

Troubleshooting

1. Why does Claude not use the Composio connector for Flexisign?

The connector can show as connected, but Claude must use it in each Flexisign conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Flexisign again.

2. Why does Claude show an MCP server error before Flexisign connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Flexisign.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Flexisign.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Flexisign authorization link not work?

The Composio connector is one server. Your Flexisign account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Flexisign connection.
  • Composio creates a fresh Flexisign authorization link.
  • Open that link in your browser and finish the Flexisign sign-in.

4. Why do Flexisign actions fail after they worked before?

The Flexisign connection can expire or lose permission.

  • Ask Claude to inspect the Flexisign connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Flexisign account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Flexisign.
  • If the action still fails with a permission error, check that the connected account has that permission in Flexisign itself.

5. How do I switch to a different Flexisign account?

Claude can manage the Flexisign connection for you.

  • Ask Claude to disconnect or delete the current Flexisign account.
  • Ask Claude to connect Flexisign again.
  • Open the new Composio authorization link for Flexisign.
  • Sign in with the other Flexisign account in the browser.
  • After the account connects, ask Claude to retry the Flexisign task.

6. Why is my Flexisign connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Flexisign connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Flexisign tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Flexisign.
TOOLS

Supported Tools

Every Flexisign action and event your agent gets out of the box.

List Templates

Tool to list all available document templates.

FRAMEWORKS

How to build Flexisign MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Flexisign MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Flexisign MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Flexisign MCP with Claude Code

Codex logo

Codex

Use Flexisign MCP with Codex

OpenClaw logo

OpenClaw

Use Flexisign MCP with OpenClaw

Hermes logo

Hermes

Use Flexisign MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Flexisign MCP with Atomic Agent

Google ADK logo

Google ADK

Use Flexisign MCP with Google ADK

LangChain logo

LangChain

Use Flexisign MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Flexisign MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Flexisign MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Flexisign MCP with LlamaIndex

CrewAI logo

CrewAI

Use Flexisign MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Flexisign MCP with Pydantic AI

AutoGen logo

AutoGen

Use Flexisign MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Flexisign MCP server, the agents and LLMs can only access a fixed set of Flexisign tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Flexisign and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Flexisign tools.

Yes, absolutely. You can configure which Flexisign scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Flexisign data and credentials are handled as safely as possible.

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