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How to connect Echtpost to Claude

Connect Claude Web, Desktop and Cowork to Echtpost MCP. Show me all postcard templates available, list templates for confidential document delivery, and more using natural language, with authentication handled for you.

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Echtpost is a secure digital communication platform for encrypted document and message exchange. It ensures confidential data stays private and protected during transmission.

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 Echtpost account to Claude via Composio Connect, enabling it to show me all postcard templates available, list templates for confidential document delivery, get preview links for secure message templates, 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 Echtpost with

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

Connecting Echtpost 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 Echtpost account

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

For example, ask Claude to:

  • "Show me all postcard templates available"
  • "List templates for confidential document delivery"
  • "Get preview links for secure message templates"

It will prompt you to authenticate and authorize access.

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

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

The Echtpost MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Echtpost account. It provides structured and secure access to your Echtpost templates, so your agent can perform actions like listing available postcard templates, retrieving template details, and preparing for secure document creation on your behalf.

  • Comprehensive template retrieval: Instantly fetch all available postcard and document templates in your Echtpost account for quick reference and selection.
  • Detailed template information: Allow your agent to access template names, descriptions, preview links, types, and creation timestamps to help you make informed decisions before sending confidential documents.
  • Template ID lookup for card creation: Let your agent efficiently obtain the necessary template IDs required for creating and dispatching secure postcards or messages.
  • Preview and validation of design assets: Preview templates visually and validate their suitability—ensuring every document meets your standards before sending.

Troubleshooting

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

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

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

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

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

  • 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 Echtpost.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Echtpost authorization link not work?

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

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

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

The Echtpost connection can expire or lose permission.

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

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

Claude can manage the Echtpost connection for you.

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

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

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

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Echtpost 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 Echtpost.
TOOLS

Supported Tools

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

List templates

This tool retrieves a list of all available templates in the Echtpost account.

FRAMEWORKS

How to build Echtpost MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Echtpost MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Echtpost MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Echtpost MCP with Claude Code

Codex logo

Codex

Use Echtpost MCP with Codex

OpenClaw logo

OpenClaw

Use Echtpost MCP with OpenClaw

Hermes logo

Hermes

Use Echtpost MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Echtpost MCP with Atomic Agent

Google ADK logo

Google ADK

Use Echtpost MCP with Google ADK

LangChain logo

LangChain

Use Echtpost MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Echtpost MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Echtpost MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Echtpost MCP with LlamaIndex

CrewAI logo

CrewAI

Use Echtpost MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Echtpost MCP with Pydantic AI

AutoGen logo

AutoGen

Use Echtpost MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Echtpost MCP server, the agents and LLMs can only access a fixed set of Echtpost tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Echtpost 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 Echtpost tools.

Yes, absolutely. You can configure which Echtpost 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 Echtpost data and credentials are handled as safely as possible.

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