How to integrate Cronly MCP with Codex

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

Cronly logoCronly
Api Key

Cronly is an operations monitoring service for cron jobs, SSL certificates, servers, and crontab backups. It helps teams catch failures and expiry risks early with clear operational alerts.

10 Tools

Introduction

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

Also integrate Cronly 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 Cronly 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 Cronly MCP server, and what's possible with it?

The Cronly MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Cronly account. It provides structured and secure access to your cron monitors, certificate checks, projects, operational notifications, servers, backups, and account details, so your agent can create monitoring checks, review resources, report successful cron runs, organize monitors, and remove checks on your behalf.

  • Cron job monitoring: Have your agent create heartbeat monitors for cron jobs, report successful runs, and review existing monitors.
  • Certificate expiry checks: Let the agent create SSL and TLS certificate monitors for your hostnames, inspect current checks, or remove checks you no longer need.
  • Project organization: Direct your agent to create projects for grouping your monitoring work, review existing projects, and delete obsolete ones.
  • Operational resource review: Instruct your agent to list and inspect notifications, servers, crontab backups, users, monitors, projects, and certificates.
  • Account overview: Have your agent retrieve your organization details, timezone, and subscription summary without exposing billing or integration secrets.

Conclusion

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

Supported Tools

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

Create Certificate Monitor

Create an SSL/TLS certificate-expiry monitor for a hostname and port.

Create Monitor

Create a cron-job heartbeat monitor and return its ID and sensitive pulse token.

Create Project

Create a project for organizing Cronly monitors and certificate checks.

Delete Certificate Monitor

Permanently delete an SSL/TLS certificate monitor by numeric ID.

Delete Monitor

Permanently delete a cron-job monitor by numeric ID.

Delete Project

Permanently delete a Cronly project by numeric ID.

Get Company

Return safe organization, timezone, and subscription-summary fields for the connected Cronly account without exposing billing or integration secrets.

Get Resource

Get one monitor, project, certificate, user, server, or backup by its resource identity.

List Resources

List notifications, monitors, projects, certificates, users, servers, or backups.

Pulse Monitor

Record a successful heartbeat for a monitor using its sensitive pulse token.

FAQ

Frequently asked questions

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

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

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