Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Docupost MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.
- Builders & DevelopersCOMPOSIOFOR YOUGive Claude, codex, or any harness secure access to 1000+ tools
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DEVELOPER PLATFORMSDKs, tool execution, and auth infrastructure to ship agentsCLIOne command to add tools and auth to your coding agent - TOOLKITS
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How to integrate Docupost MCP with Codex
Connect Codex to Docupost MCP. Mail a pdf letter to your accountant, send a custom postcard to new customers, and more using natural language, with authentication handled for you.
Api Key
Docupost is a print and mail service that lets you send digital files as physical letters or postcards via USPS. Instantly automate offline mailings without manual printing or trips to the post office.
3 Tools
Introduction
Also integrate Docupost with
Why use Composio?
Apart from a managed and hosted MCP server, you will get:
- CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
- Large tool responses: Handle them to minimise context rot.
- Dynamic just-in-time access to 20,000 tools across 1000+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.
How to install Docupost MCP in Codex
Run the setup command
Run this command in your terminal to add the Composio MCP server to Codex.
It will initiate the authentication in a browser window, authorize Codex to access your Composio account.
(Optional) Authenticate with OAuth
To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.
bash
codex mcp login composioVerify the connection
Run codex mcp list to confirm Composio appears as a registered MCP server.
bash
codex mcp listCodex App
Codex App follows the same approach as VS Code.
- Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
- Fill the header and Key fields with
{ "x-consumer-api-key" = "ck_*******" }. - The Key is the Composio API key, that you can find on dashboard.composio.dev
- Click on Authenticate and authorize Codex to your Composio account and you're all set.
- Restart and verify if it's there in
.codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }What is the Docupost MCP server, and what's possible with it?
The Docupost MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Docupost account. It provides structured and secure access to Docupost's print and mail services, so your agent can send letters, mail postcards, and automate physical document delivery on your behalf.
- Automated letter mailing: Direct your agent to send digital files as physical letters to any recipient in the U.S., specifying sender and recipient details.
- Personalized postcard delivery: Have your agent create and mail custom postcards, using front and back image designs tailored for your recipients.
- Bulk document distribution: Let your agent send batches of letters or postcards to multiple addresses, streamlining mass mail campaigns or notifications.
- Seamless file-to-mail conversion: Enable your agent to instantly turn PDFs or images into tangible mail pieces, no printing or trips to the post office required.
Conclusion
You've successfully integrated Docupost with Codex using Composio's MCP server. Now you can interact with Docupost directly from your terminal, VS Code, or the Codex App using natural language commands.
Key benefits of this setup:
- Seamless integration across CLI, VS Code, and standalone app
- Natural language commands for Docupost operations
- Managed authentication through Composio
- Access to 20,000+ tools across 1000+ apps for cross-app workflows
- CodeAct workbench for complex tool chaining
Next steps:
- Try asking Codex to perform various Docupost operations
- Explore cross-app workflows by connecting more toolkits
- Build automation scripts that leverage Codex's AI capabilities
TOOLS
Supported Tools
Every Docupost action and event your agent gets out of the box.
FRAMEWORKS
How to build Docupost MCP Agent with another framework
OpenAI Agents SDK
Use Docupost MCP with OpenAI Agents SDK
Claude Agent SDK
Use Docupost MCP with Claude Agent SDK
Claude Code
Use Docupost MCP with Claude Code
Claude Cowork
Use Docupost MCP with Claude Cowork
OpenClaw
Use Docupost MCP with OpenClaw
Hermes
Use Docupost MCP with Hermes
Google ADK
Use Docupost MCP with Google ADK
LangChain
Use Docupost MCP with LangChain
Vercel AI SDK
Use Docupost MCP with Vercel AI SDK
Mastra AI
Use Docupost MCP with Mastra AI
LlamaIndex
Use Docupost MCP with LlamaIndex
CrewAI
Use Docupost MCP with CrewAI
Pydantic AI
Use Docupost MCP with Pydantic AI
AutoGen
Use Docupost MCP with AutoGen
MORE TOOLKITS
Explore Other Toolkits
Google Drive
Oauth2
Google Drive is a cloud storage platform for uploading, sharing, and collaborating on files. It's perfect for keeping your documents accessible and organized across devices.
Google Docs
Oauth2
Google Docs is a cloud-based word processor that enables document creation and real-time collaboration. Its seamless sharing and version history make team editing and content management a breeze.
Google Super
Oauth2Api Key
Google Super is an all-in-one suite combining Gmail, Drive, Calendar, Sheets, Analytics, and more. It gives you a unified platform to manage your digital life, boosting productivity and organization.
Affinda
Api Key
Affinda is an AI-powered document processing platform that automates data extraction from resumes, invoices, and more. It streamlines document-heavy workflows by turning files into structured, actionable data.
FAQ
Frequently asked questions
With a standalone Docupost MCP server, the agents and LLMs can only access a fixed set of Docupost tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Docupost and many other apps based on the task at hand, all through a single MCP endpoint.
Yes, you can. Codex 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 Docupost tools.
Yes, absolutely. You can configure which Docupost 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 Docupost data and credentials are handled as safely as possible.
Start with Docupost.It takes 30 seconds.
Managed auth, hosted MCP servers, and every Docupost tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building