How to integrate Laposta MCP with Codex

GET STARTED FOR FREE
Framework Integration Gradient
Laposta Logo
Codex Logo
divider

Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Laposta MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or app, whichever you prefer.

Composio removes the Authentication handling completely from you. We handle the entire integration lifecycle, and all you need to do is just copy the URL below, authenticate inside Codex, and start using it.

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 870+ 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 Laposta MCP in Codex

Codex CLI

Run the command in your terminal.

Terminal

This will auto-redirect you to the Rube authentication page.

Rube authentication redirect page

Once you're authenticated, you will be able to access the tools.

Verify the installation by running:

codex mcp list

If you otherwise prefer to use config.toml, add the following URL to it. You can get the bearer token from rube.app → Use Rube → MCP URL → Generate token

[projects."/home/user/composio"]
trust_level = "untrusted"

[mcp_servers.rube]
bearer_token_env_var = "your bearer token"
enabled = true
url = "https://rube.app/mcp"

Codex in VS Code

If you have installed Codex in VS Code.

Then: ⚙️ → MCP Settings → + Add servers → Streamable HTTP:

Add the Rube MCP URL: https://rube.app/mcp and the bearer token.

VS Code MCP Settings

To verify, click on the Open config.toml

Open config toml in Codex

Make sure it's there:

[mcp_servers.composio_rube]
bearer_token_env_var = "your bearer token"
enabled = true
url = "https://rube.app/mcp"

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
Codex App MCP Settings
  1. Restart and verify if it's there in .codex/config.toml
[mcp_servers.composio_rube]
bearer_token_env_var = "your bearer token"
enabled = true
url = "https://rube.app/mcp"
  1. Save, restart the extension, and start working.

What is the Laposta MCP server, and what's possible with it?

The Laposta MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Laposta account. It provides structured and secure access so your agent can perform Laposta operations on your behalf.

Supported Tools & Triggers

Tools
Get All CampaignsTool to retrieve all campaigns from Laposta account.
Create Custom FieldTool to create a custom field for a mailing list to define subscriber attributes.
Delete FieldTool to permanently remove a custom field from a mailing list.
Get Field DetailsTool to retrieve specific field details by field_id.
Get All FieldsTool to retrieve all fields for a specific list in Laposta.
Update FieldTool to modify field configuration in a Laposta list.
Clear All Members From ListTool to clear all active members from a list.
Create Mailing ListTool to create a new mailing list in Laposta to manage email subscribers.
Delete ListTool to permanently remove a mailing list from Laposta.
Get List DetailsTool to retrieve specific list details by list_id.
Get All ListsTool to retrieve all mailing lists from your Laposta account.
Update Mailing ListTool to modify list properties such as name, remarks, or notification emails.
Create MemberTool to add a new subscriber relationship to a list with custom fields and tracking info.
Delete MemberTool to permanently remove a member from a list.
Get MemberTool to retrieve specific member details by member_id or email.
Get All MembersTool to retrieve all members from a specified Laposta mailing list.
Update MemberTool to modify member data, status, or custom fields in a Laposta list.
Get All Campaign ReportsTool to retrieve performance metrics for all campaigns.
Get All SegmentsTool to retrieve all segments from a mailing list.
Create WebhookTool to register a new webhook for list events in Laposta.
Delete WebhookTool to permanently remove a webhook.
Get Webhook DetailsTool to retrieve specific webhook details by webhook_id.
Get All WebhooksTool to retrieve all webhooks for a specific list.
Update WebhookTool to modify webhook configuration including URL, event type, or blocked status.

Conclusion

You've successfully integrated Laposta with Codex using Composio's Rube MCP server. Now you can interact with Laposta 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 Laposta operations
  • Managed authentication through Composio's Rube
  • Access to 20,000+ tools across 870+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

  • Try asking Codex to perform various Laposta operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities

How to build Laposta MCP Agent with another framework

OpenAI Agents SDK

OpenAI Agents SDK

Use Laposta MCP with OpenAI Agents SDK

Claude Agent SDK

Claude Agent SDK

Use Laposta MCP with Claude Agent SDK

Google ADK

Google ADK

Use Laposta MCP with Google ADK

LangChain

LangChain

Use Laposta MCP with LangChain

Vercel AI SDK

Vercel AI SDK

Use Laposta MCP with Vercel AI SDK

Mastra AI

Mastra AI

Use Laposta MCP with Mastra AI

LlamaIndex

LlamaIndex

Use Laposta MCP with LlamaIndex

CrewAI

CrewAI

Use Laposta MCP with CrewAI

Claude Code

Claude Code

Use Laposta MCP with Claude Code

FAQ

What are the differences in Tool Router MCP and Laposta MCP?

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

Can I use Tool Router MCP with Codex?

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 Laposta tools.

Can I manage the permissions and scopes for Laposta while using Tool Router?

Yes, absolutely. You can configure which Laposta 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.

How safe is my data with Composio Tool Router?

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 Laposta data and credentials are handled as safely as possible.

Used by agents from

Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai

Never worry about agent reliability

We handle tool reliability, observability, and security so you never have to second-guess an agent action.

Book a call↗Get started for free