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How to integrate Circleci MCP with Codex

Connect Codex to Circleci MCP. Trigger a new pipeline on main branch, list all pipelines for backend service, and more using natural language, with authentication handled for you.

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Circleci is a leading continuous integration and delivery platform for automating code builds, tests, and deployments. It helps teams ship quality software faster by streamlining DevOps workflows.

71 Tools

Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With the Circleci MCP integration, Codex can trigger pipelines, rerun and cancel workflows, inspect jobs and artifacts, manage environment variables and contexts, and find flaky tests, all without leaving the terminal or the app, whichever you prefer.

Also integrate Circleci with

Claude CodeClaude CoworkOpenAI Agents SDKClaude Agent SDKGrok BotOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

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 1700+ 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 Circleci 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_*******" }

Try it

Ask Codex for a Circleci task. The first time, Composio asks you to connect your Circleci account.

For example, ask it to:

  • "Trigger a new pipeline on main branch"
  • "List all pipelines for backend service"
  • "Get test results from last successful build"

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

The Circleci MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Circleci account. It provides structured and secure access to your Circleci projects and pipelines, so your agent can trigger builds, fetch job artifacts, monitor workflows, and analyze test results on your behalf.

  • Automated pipeline triggering and management: Let your agent start new builds for specific branches or tags, enabling continuous integration workflows without manual intervention.
  • Workflow and job status monitoring: Ask your agent to fetch detailed information about jobs and workflows, including status, timing, and execution environment, to stay on top of your CI/CD processes.
  • Artifact and test result retrieval: Have the agent collect job artifacts or extract comprehensive test metadata and failure messages for easier debugging and reporting.
  • Pipeline and runner insights: Get your agent to list all pipelines for a project or enumerate available self-hosted runners, making it simple to manage and audit your Circleci resources.
  • User and configuration access: Retrieve user profile details or fetch pipeline YAML configurations as needed for documentation, troubleshooting, or workflow optimization.

Conclusion

You've successfully integrated Circleci with Codex using Composio's MCP server. Now you can interact with Circleci 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 Circleci operations
  • Managed authentication through Composio
  • Access to 20,000+ tools across 1700+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

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

Supported Tools

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

Cancel Workflow

Cancel a running CircleCI workflow.

Create Context

Tool to create a new context in CircleCI.

Create Context (GraphQL)

Create a CircleCI context for an organization using the GraphQL API.

Create Context Restriction

Tool to create a context restriction in CircleCI.

Create Organization Orb Allowlist

Tool to create a new URL Orb allow-list entry for an organization.

Create Organization Project

Tool to create a new project within a CircleCI organization.

Create Organization Group

Tool to create a group in an organization.

Create Project Environment Variable

Tool to create a new environment variable for a CircleCI project.

Create Usage Export Job

Tool to create a usage export job for a CircleCI organization.

Delete Context (GraphQL)

Delete a CircleCI context by its UUID using the REST API.

Delete Context Restriction

Tool to delete a context restriction by its ID.

Delete Namespace and Related Orbs

Tool to delete a CircleCI registry namespace and all its associated orbs.

Delete Namespace Alias

Tool to remove a namespace alias by name in CircleCI.

Delete Organization Orb Allowlist Entry

Tool to remove an entry from the organization's URL orb allow-list.

Delete Organization Group

Tool to delete a group from a CircleCI organization.

Delete Project

Tool to delete a CircleCI project and its settings.

Delete Project Environment Variable

Tool to delete an environment variable from a CircleCI project.

Get Context

Tool to retrieve a context by its unique ID.

Get Current User

Tool to retrieve information about the currently authenticated user.

Get Flaky Tests

Tool to get flaky tests for a project.

Get Job Artifacts

Retrieves artifacts (output files like test results, logs, build binaries, reports) produced by a CircleCI job.

Get Job Details

Tool to fetch details of a specific job within a project.

Get Legacy Build Details

Retrieve a legacy CircleCI v1.

Get Orb Details

Tool to query detailed information about a CircleCI orb using the GraphQL API.

Get Orb Version

Tool to retrieve detailed information about a specific CircleCI orb version via GraphQL.

Get Organization

Tool to retrieve organization details from CircleCI using GraphQL query.

Get Organization Group

Tool to retrieve a group in an organization.

Get Pipeline

Retrieve metadata for a CircleCI pipeline by its UUID.

Get Pipeline Config

Tool to fetch pipeline configuration by ID.

Get Pipeline Definition

Tool to retrieve a pipeline definition by project and definition ID.

Get Pipeline Values

Retrieve the runtime values resolved for a CircleCI pipeline.

Get Project

Tool to retrieve a CircleCI project by its slug.

Get Project Workflows

Get summary metrics for a project's workflows, including success rates, duration, throughput, and credits used.

Get Test Metadata

Tool to fetch test metadata for a specific job.

Get Usage Export Job

Tool to retrieve a usage export job by organization ID and job ID.

Get User Information

Tool to retrieve information about a CircleCI user by their unique ID.

Get Workflow Summary

Tool to get metrics and trends for a workflow.

Inspect Workflow

Inspect a workflow's summary and one page of its jobs.

List Context Environment Variables

List environment variable names and metadata for a CircleCI context, with pagination.

List Insights Branches

Tool to get all branches for a project from CircleCI Insights.

List Insights Summary

Tool to get summary metrics with trends for the entire organization and for each project.

List Namespace Orbs

Tool to list orbs in a CircleCI registry namespace with pagination support.

List Orb Categories

Tool to retrieve all CircleCI orb categories with pagination support.

List Orbs

Tool to list CircleCI orbs with pagination support via GraphQL API.

List Organization Groups

List groups in a CircleCI organization, with pagination support.

List Pages Summary

Tool to get summary metrics and trends for a project across its workflows and branches.

List Pipeline Definitions

List pipeline definitions for a specific project, including their configuration sources.

List Pipelines

Tool to get a list of pipelines for an organization.

List Pipelines for Project

List pipelines for a specific project, optionally filtered by branch or current user.

List Project Environment Variables

List project-level environment variables for a CircleCI project.

List Project Schedules

List scheduled pipeline triggers for a specific project.

List Self-Hosted Runners

List CircleCI self-hosted runners for exactly one namespace or resource class.

List User Collaborations

Tool to retrieve organizations where the authenticated user has access.

List Workflows by Pipeline ID

Tool to list all workflows associated with a specific pipeline.

List Workflows Jobs Workflows

Tool to get summary metrics for a project workflow's jobs.

List Workflows Test Metrics

Tool to get test metrics for a project's workflows.

Query Context

Retrieve a CircleCI context by UUID using the GraphQL API, including its ID, name, and creation time.

Query Namespace Exists

Tool to determine if a namespace exists in the CircleCI registry.

Query Orb Category ID

Query a CircleCI orb category ID by category name.

Query Orb Exists

Tool to check if an orb exists in CircleCI registry and retrieve its privacy status.

Query Orb ID

Tool to fetch an orb's ID and optionally its namespace ID by orb name.

Query Orb Latest Version

Query the latest published version of a CircleCI orb for dependency management or updates.

Query Orb Source

Tool to retrieve source code of a specific CircleCI orb version via GraphQL.

Query Plan Metrics

Tool to query plan metrics including credit usage by project and organization for a date range.

Remove Context Environment Variable (GraphQL)

Tool to remove an environment variable from a CircleCI context using GraphQL API.

Rename Namespace

Tool to rename a CircleCI namespace by its UUID identifier.

Rerun Workflow

Rerun a CircleCI workflow, optionally selecting jobs or failed work.

Store Environment Variable

Tool to store an environment variable in a CircleCI context using GraphQL mutation.

Trigger Pipeline

Triggers a new CI/CD pipeline run for a specified CircleCI project.

Upsert Context Environment Variable

Tool to add or update an environment variable in a CircleCI context.

Validate Orb Config

Tool to validate CircleCI orb YAML configuration using the orbConfig GraphQL query.

FRAMEWORKS

How to build Circleci MCP Agent with another framework

Claude Code logo

Claude Code

Use Circleci MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Circleci MCP with Claude Cowork

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Circleci MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Circleci MCP with Claude Agent SDK

Grok Bot logo

Grok Bot

Use Circleci MCP with Grok Bot

OpenClaw logo

OpenClaw

Use Circleci MCP with OpenClaw

Hermes logo

Hermes

Use Circleci MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Circleci MCP with Atomic Agent

Google ADK logo

Google ADK

Use Circleci MCP with Google ADK

LangChain logo

LangChain

Use Circleci MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Circleci MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Circleci MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Circleci MCP with LlamaIndex

CrewAI logo

CrewAI

Use Circleci MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Circleci MCP with Pydantic AI

AutoGen logo

AutoGen

Use Circleci MCP with AutoGen

FAQ

Frequently asked questions

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

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

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