CircleCI

Cancel a running CircleCI workflow, given its UUID (a workflow id from list_workflows or get_workflow). Cancellation is asynchronous: a successful call means the request was accepted, not that the workflow has stopped yet.

Export a CircleCI organization's usage data as downloadable CSV files. This is a two-phase, asynchronous tool. Phase 1 — start: call with org (an org slug like "gh/acme" or an org UUID), start_date, and end_date (both YYYY-MM-DD, a window of at most 31 days) and no export_id; it returns an export_id. Phase 2 — poll/download: call again with that export_id and the same org; once the export is ready it returns pre-signed download URLs (no auth needed), or asks you to try again in a minute while it is still being prepared. Optionally include shared_org_ids on Phase 1 to cover additional organizations.

Fetch a single CircleCI deploy component by its UUID (a component id from list_deploy_components), returning its name and owning project ID.

Fetch a single CircleCI deploy environment by its UUID (an environment id from list_deploy_environments), returning its name and owning org ID.

Fetch a single CircleCI job by its UUID (a job id from list_jobs), returning its phase, outcome, and per-step detail including each step's exit code — the signal for which step failed.

Fetch the stdout/stderr of a CircleCI job's steps, given the job's UUID (a job id from list_jobs). When no step is named, the failed steps are read automatically — the fast path from a failing job to the output that explains it. Output is rendered to plain text (ANSI escapes stripped, progress-bar redraws collapsed) unless raw=true. Use tail_lines to keep only the final lines of each step (where errors surface), and execution to pick among a parallel job's executions.

Fetch a registry orb's metadata and published version history — given the orb as "namespace/name" (e.g. "circleci/go") or an orb UUID. Returns the latest version, 30-day usage stats, categories, and the list of published (stable) versions: the signal for whether a version pinned in a config is stale and what to bump it to. Use get_orb_source to read a specific version's definition.

Fetch the YAML source of an orb version referenced by a CircleCI config — given the orb as "namespace/name" optionally pinned to a version ("circleci/go@1.2.3", "@volatile" for latest, or a dev label "@dev:my-branch"); with no @version the latest published version is read. The source is the definition of the commands, jobs, executors, and parameters the config invokes — read it to learn how to call an orb correctly. Works only for registry orbs (namespace/name), not inline or URL orbs.

Fetch a single CircleCI run by its UUID (a run id from list_runs), returning its phase, outcome, VCS details, and any config errors. The next step in the CI-access chain: a run's id feeds list_workflows.

Fetch a single CircleCI workflow by its UUID (a workflow id from list_workflows), returning its name, phase, and outcome. A workflow's id feeds list_jobs.

Verify connectivity to the CircleCI MCP server

List the artifacts a CircleCI job produced — the files it persisted beyond the run, such as test reports, coverage, build outputs, or logs — given the job's UUID (a job id from list_jobs or get_job). Each artifact carries its path within the job and a URL to download it.

List versions of a CircleCI deploy component — given the component's UUID (a component id from list_deploy_components or get_deploy_component). Optionally filter by deploy environment with the environment parameter.

List CircleCI deploy components for a project — given its slug ("gh/org/repo") or UUID. Deploy components are the deployable units of a project (services, applications, libraries). Each component's id feeds get_deploy_component and list_deploy_component_versions.

List CircleCI deploy environments for an organization — given its slug ("gh/myorg") or UUID. Deploy environments represent named targets such as production or staging where components are released. Each environment's id feeds get_deploy_environment and can filter list_deploy_component_versions.

List recent CircleCI deployments for a project — given its slug ("gh/org/repo") or UUID. Returns deployments newest-first with component name, version, type, status, and timestamps. Use this to answer "what was last deployed" or "when was version X deployed" without first looking up component or environment IDs.

List a CircleCI job's test results, given the job's UUID (a job id from list_jobs or get_job). By default only failing tests are returned — the ones that explain a failure; set all=true to include passing and skipped tests. Narrow further with filter ("result=...", "name=...", "classname=..."). A job's full test set can be very large, so the number returned is capped by limit (defaults to 100); when more tests matched than were returned, truncated is true — narrow the filter or raise limit for the rest.

List the jobs belonging to a CircleCI workflow, given the workflow's UUID (a workflow id from list_workflows or get_workflow). The next step in the CI-access chain: each job's id feeds get_job.

List CircleCI runs for a project — given its slug ("gh/org/repo") or UUID — or the authenticated user's own runs across all projects (mine=true). Optionally filter by git branch and/or pipeline status. This is the entry point of the CI-access tool chain; each run's id feeds get_run and the workflow/job tools.

List the workflows belonging to a CircleCI run, given the run's UUID (a run id from list_runs or get_run). The next step in the CI-access chain: each workflow's id feeds get_workflow and list_jobs.

Rerun a CircleCI workflow, given its UUID (a workflow id from list_workflows or get_workflow). By default every job reruns from the start; set from_failed=true to rerun only the failed jobs and everything downstream of them, reusing the successful ones. A rerun creates a new workflow, whose id is returned to follow the new run.

Validate a CircleCI pipeline config by compiling it — the equivalent of the `circleci config validate` CLI command. Pass the raw config YAML (the contents of .circleci/config.yml) as config; the server expands orbs, resolves parameter expressions, and expands matrix jobs, returning valid=true on success or valid=false with the compilation errors on failure. Supply org (a slug like "gh/acme" or a UUID) whenever the config references anything org-scoped: private registry orbs, or URL orbs — any orb whose value is a URL rather than "namespace/name@version", which are gated by the org's URL orb allow-list. Without org, only public registry orbs resolve, so those references fail with errors like "not permitted by the organization's URL orb allow-list" or "orb not found" — these are false negatives from missing org context, NOT real config problems, so before reporting a config invalid, check whether it declares private or URL orbs and if so retry with org. set preview_next=true to preview upcoming, potentially breaking config changes; pass pipeline_parameters to resolve << pipeline.parameters.* >> expressions.