CircleCI's official MCP server exists to close one specific loop: a build fails, and the person who has to fix it is already in an editor with an AI assistant open, not in the CircleCI web UI reading logs. Built by CircleCI, it is officially maintained and best for DevOps & CI/CD.
by CircleCI
About
CircleCI's official MCP server exists to close one specific loop: a build fails, and the person who has to fix it is already in an editor with an AI assistant open, not in the CircleCI web UI reading logs. get_build_failure_logs pulls the actual failure output for a branch or pipeline into the conversation, which is enough for an assistant to propose a patch against the real error rather than a guessed one. get_latest_pipeline_status answers whether the branch is currently green, and get_job_test_results returns test metadata so a model can distinguish a genuine regression from an environment problem. Beyond triage, the server covers the workflows around a build. find_flaky_tests analyses execution history to name the tests that pass and fail without a code change — the single most valuable tool here, because flakiness is exactly the kind of pattern that is obvious across hundreds of runs and invisible in any one of them. find_underused_resource_classes reports jobs provisioned larger than their actual compute use, which is a direct cost lever on a CI bill, and download_usage_api_data pulls raw Usage API data for the same analysis. config_helper validates a .circleci/config.yml and explains what is wrong with it, so an assistant can iterate on config without pushing commits to find out. Control tools cover run_pipeline, rerun_workflow (from the start or just from the failed job), run_rollback_pipeline, list_artifacts, list_followed_projects and list_component_versions. Installation is npx -y @circleci/mcp-server-circleci@latest with CIRCLECI_TOKEN in the environment, and there is an official Docker image (circleci/mcp-server-circleci) plus a self-managed remote-server mode documented for teams that would rather run one shared instance than a process per developer. CIRCLECI_BASE_URL is optional and only needed by on-prem customers. Note that rerun_workflow, run_pipeline and run_rollback_pipeline are write operations against real infrastructure — a rollback pipeline in particular ships to production — so a token scoped to the projects you want an agent touching is worth setting up before you connect it.
Trust verdict
How grades are computed →Grade A (98/100, reliable) from 1 measured signal, based on repository evidence. Only one signal stands behind it, so treat the grade as provisional.
What was measured
- Repository maintenance100/100 · weight 20
The repository has been pushed to or released within the last six months. — last push 2026-07-19.
- Source verification100/100 · weight 25
The repository URL was confirmed to resolve against the live GitHub API and is not archived.
- Provenance90/100 · weight 10
Published and maintained by the vendor of the service it connects to, rather than by a third party.
- Listing ↔ repository match100/100 · weight 5
The listing name lines up with the linked repository CircleCI-Public/mcp-server-circleci.
What could not be measured
These contributed nothing to the score — not a penalty, not a zero. They are why the confidence reads the way it does.
- Live MCP handshakeunknown
No remote endpoint to handshake — this server installs and runs locally over stdio, so there is nothing to probe from the outside.
- Measured uptimeunknown
No probe history recorded for this server yet.
- Tool-schema stabilityunknown
Drift is a difference between two successive checks, and this server has none recorded.
Installation
claude mcp add circleci-mcp-server -e CIRCLECI_TOKEN=your-circleci-token -- npx -y @circleci/mcp-server-circleci@latest@circleci/mcp-server-circleci confirmed live on the npm registry — checked August 17, 2026.
Categories
Frequently Asked Questions
What is CircleCI MCP Server?
Who built CircleCI MCP Server?
Is CircleCI MCP Server free?
How do I install CircleCI MCP Server?
What does CircleCI MCP Server integrate with?
Related Guides
Repo Health
Local/stdio install — runs on your machine, so there is no remote endpoint to verify live. Trust signal below is from the source repo.
- Last commit
- 1mo ago
- Install
- npm
Quick Info
- Install Type
- npm
- Author
- CircleCI
- Categories
- 1
- Integrations
- 5
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