How to integrate Kapso MCP with Codex

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

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Api Key

Kapso is an API platform for WhatsApp messaging, contacts, broadcasts, workflows, and serverless functions. It helps teams manage customer conversations and automate outreach from one place.

10 Tools

Introduction

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

Also integrate Kapso 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 Kapso MCP in Codex

Run the setup command

Run this command in your terminal to add the Composio MCP server to Codex.

Terminal

It will initiate the authentication in a browser window, authorize Codex to access your Composio account.

Composio authentication page

(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 composio

Verify the connection

Run codex mcp list to confirm Composio appears as a registered MCP server.

bash
codex mcp list

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
  2. Fill the header and Key fields with { "x-consumer-api-key" = "ck_*******" }.
  3. The Key is the Composio API key, that you can find on dashboard.composio.dev
  4. Click on Authenticate and authorize Codex to your Composio account and you're all set.
Codex App MCP setup
  1. 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 Kapso MCP server, and what's possible with it?

The Kapso MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Kapso account. It provides structured and secure access to your WhatsApp conversations, messages, customers, phone numbers, workflows, and serverless functions, so your agent can review conversations, inspect message history, find customers, check phone number health, and examine automations on your behalf.

  • Conversation and message review: Have your agent list recent WhatsApp conversations, filter them by status or assignment, and inspect message history.
  • Customer lookup: Let the agent find Kapso customers by name, external reference, or creation date.
  • Phone number monitoring: Direct your agent to review configured WhatsApp phone numbers and check their current health, messaging state, and configuration.
  • Workflow inspection: Instruct your agent to list workflows, filter them by name or lifecycle status, and examine their definitions and available variables.
  • Serverless function visibility: Have your agent list Kapso functions and inspect their code, runtime settings, deployment status, and computed URLs without running or changing them.

Conclusion

You've successfully integrated Kapso with Codex using Composio's MCP server. Now you can interact with Kapso 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 Kapso 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 Kapso operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities
TOOLS

Supported Tools

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

Get Function

Retrieve one Kapso serverless function's code, runtime configuration, deployment status, and computed URLs without invoking or changing it.

Get Phone Number

Retrieve one Kapso WhatsApp phone-number configuration by its Meta phone number ID.

Get Phone Number Health

Run Kapso's live checks for one WhatsApp phone-number configuration and return its body-level health status and individual check results.

Get Workflow

Retrieve one workflow's metadata, full graph definition, or available variables without executing or changing it.

List Conversations

List one page of WhatsApp conversations by recent activity, with filters for phone number, status, assignment, and activity time range.

List Customers

List Kapso project customers and filter them by name, external customer ID, or creation time.

List Functions

List serverless functions configured in the Kapso project, including runtime and deployment state, without returning function source code or invoking any function.

List Messages

List one page of WhatsApp message history project-wide through Kapso Platform or for one phone number through the Meta-compatible proxy.

List Phone Numbers

List WhatsApp phone-number configurations in the Kapso project, with filters for account, customer, messaging state, and display name.

List Workflows

List project workflows and filter them by lifecycle status, name, or creation time.

FAQ

Frequently asked questions

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

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

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