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How to connect Thanks io to Claude

Connect Claude Web, Desktop and Cowork to Thanks io MCP. Add new customer to holiday mailing list, show all available handwritten font styles, and more using natural language, with authentication handled for you.

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Thanks io is a direct mail automation platform for sending personalized postcards, letters, and notecards. Reach your customers offline with scalable, handwritten-style mailings.

29 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 Thanks io account to Claude via Composio Connect, enabling it to add new customer to holiday mailing list, show all available handwritten font styles, create a mailing list for event attendees, 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 Thanks io with

Claude CodeOpenAI Agents SDKClaude Agent SDKCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Thanks io 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 Thanks io account

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

For example, ask Claude to:

  • "Add new customer to holiday mailing list"
  • "Show all available handwritten font styles"
  • "Create a mailing list for event attendees"

It will prompt you to authenticate and authorize access.

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

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

The Thanks io MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Thanks io account. It provides structured and secure access to your direct mail platform, so your agent can perform actions like managing mailing lists, sending personalized postcards, choosing templates, and handling recipients automatically on your behalf.

  • Mailing list management: Effortlessly create, list, or delete mailing lists, and keep your recipient groups organized for targeted campaigns.
  • Recipient automation: Quickly add or remove recipients from mailing lists, ensuring your contacts are always up to date and ready for new mailings.
  • Personalized mail creation: Enable your agent to select from available handwriting styles or image templates, so every postcard, letter, or notecard feels truly unique.
  • Template selection and preview: Browse and choose from message and image templates to customize your direct mail content for any occasion.
  • Automated sending workflows: Trigger stored send actions to deliver mailings at the right moment, keeping your outreach timely and efficient.

Troubleshooting

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

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

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

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

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

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

3. Why does the Thanks io authorization link not work?

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

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

4. Why do Thanks io actions fail after they worked before?

The Thanks io connection can expire or lose permission.

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

5. How do I switch to a different Thanks io account?

Claude can manage the Thanks io connection for you.

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

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

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

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

Supported Tools

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

Add Recipient to Mailing List

Tool to add a new recipient to a mailing list.

Create Mailing List

Tool to create a new mailing list.

Delete Mailing List

Tool to delete a mailing list.

Delete Recipient from Mailing List

Tool to remove a recipient from a mailing list.

Delete Sub-Account

Tool to delete a specific sub-account by ID.

Execute Stored Send

Tool to execute a previously created stored send.

List Handwriting Styles

Tool to retrieve available handwriting styles.

List Image Templates

Tool to retrieve a list of available image templates.

List Mailing Lists

Tool to list all mailing lists.

List Message Templates

Tool to list available message templates.

Buy Radius Search Mailing List

Tool to buy or append a radius search mailing list based on address and radius.

Preview letter send

Tool to preview a letter send as PDF.

Preview Notecard

Tool to preview a notecard send.

Preview Windowless Letter

Tool to preview a windowless letter send.

List Orders

Tool to list recent orders.

Search Orders by Recipient Street Address

Tool to search orders by recipient street address.

Create Multiple Recipients

Tool to create multiple recipients at once in a mailing list.

Delete Recipient by Address

Tool to delete a recipient by address and postal code.

Get Recipient Details

Tool to get details for a specific recipient by ID.

Search Recipients by Email

Tool to search recipients by email across mailing lists.

Update Recipient

Tool to update existing recipient details by recipient ID.

Send Postcard

Tool to send a customized postcard.

Stored Send Notecard

Tool to create a stored send for a notecard.

Stored Send Postcard

Tool to create a stored send for a postcard.

Stored Send Windowless Letter

Tool to create a stored send for a windowless letter.

Create Sub-Account

Tool to create a new sub-account.

List Sub Accounts

Tool to list all available sub-accounts.

Get Sub Account Details

Tool to retrieve details for a specific sub-account by ID.

Update Sub-Account

Tool to update details for a specific sub-account.

FRAMEWORKS

How to build Thanks io MCP Agent with another framework

Claude Code logo

Claude Code

Use Thanks io MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Thanks io MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Thanks io MCP with Claude Agent SDK

Codex logo

Codex

Use Thanks io MCP with Codex

OpenClaw logo

OpenClaw

Use Thanks io MCP with OpenClaw

Hermes logo

Hermes

Use Thanks io MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Thanks io MCP with Atomic Agent

Google ADK logo

Google ADK

Use Thanks io MCP with Google ADK

LangChain logo

LangChain

Use Thanks io MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Thanks io MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Thanks io MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Thanks io MCP with LlamaIndex

CrewAI logo

CrewAI

Use Thanks io MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Thanks io MCP with Pydantic AI

AutoGen logo

AutoGen

Use Thanks io MCP with AutoGen

FAQ

Frequently asked questions

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

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

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