MCP Zuul
UnclaimedMCP server for Zuul CI - debug build failures, search logs, manage pipelines, and monitor jobs from Claude, Cursor, or any MCP client
Install
claude mcp add zuul -e ZUUL_URL=https://your-zuul.example.com -- uvx mcp-zuulSet up this server
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40 of 40 tools
Documented tools (40)
From project documentation. A server handshake does not verify each tool’s description or behavior.
browse_build_logs
List log directory contents or fetch specific files (inventory, artifacts, must-gather). Max 512KB per file. Accepts url or uuid.
check_health
Test API connectivity, auth status, and config. Triggers re-auth automatically if the Kerberos session expired.
diagnose_build
One-call failure diagnosis. Combines structured failures from job-output.json with targeted log context (fatal/FAILED lines with surrounding context from job-output.txt). Use instead of calling getbuildfailures + getbuildlog separately. Accepts url or uuid.
enqueue
Enqueue a change or ref into a pipeline. Supports both change-based (check/gate) and ref-based (periodic) enqueue.
find_flaky_jobs
Analyze recent build history for intermittent failures. Computes pass/fail rate and flags jobs as flaky (>20% failure with mixed results).
get_autohold
Full details of a specific autohold request — held nodes, timing, project/job.
get_badge
CI status badge URL (SVG) for a project — embeddable in READMEs with Markdown snippet.
get_build
Full build details — nodeset, log URL, artifacts, error detail. Accepts url or uuid.
get_build_failures
Start here for failures. Structured task-level data from job-output.json — failed play, task, host, msg, rc, stderr/stdout. Accepts url or uuid.
get_build_log
Read and search log files. Modes: summary (tail + error lines), full (paginated), grep (regex + context), startline/endline (exact range). Supports logname for any file. Accepts url or uuid.
get_build_times
Build duration trends with avg/min/max stats. Detect performance regressions or timeout-prone jobs.
get_buildset
Full buildset with all builds and events. Accepts url or uuid.
get_change_status
Status for a change/PR/MR. In pipeline: live jobs with elapsed times. Not in pipeline: auto-fetches latest completed buildset. Accepts url or change.
get_components
System components — schedulers, executors, mergers, web servers with state and version.
get_config_errors
Check this when jobs aren't running. Configuration errors, missing refs, broken configs. Filterable by project.
get_connections
Configured source connections — Gerrit, GitHub, GitLab instances with driver and hostname.
get_freeze_job
Resolved job config after inheritance. Final merged nodeset, playbooks, variables, and timeout for a specific job. Answers "what will this job actually do?"
get_freeze_jobs
Resolved job dependency graph for a pipeline/project/branch. Shows exactly which jobs will run with inheritance resolved.
get_job
Job configuration — parent, nodeset, timeout, variants, source project.
get_job_durations
Batch avg/min/max duration for multiple jobs in one call. Designed for monitoring an entire pipeline chain without N separate calls.
get_project
Which pipelines and jobs are configured for a project.
get_status
Live pipeline status — what's queued, running, with job progress and ETA. Filterable by pipeline and project.
get_tenant_info
Tenant capabilities — auth realms, job history support, websocket URL.
list_autoholds
Active autohold requests — nodes held after failure for debugging.
list_builds
Search builds by project, pipeline, job, change, result. Includes buildsetuuid for cross-referencing.
list_buildsets
Search buildsets. Use includebuilds=true to inline full build details (saves round-trips).
list_images
Nodepool disk images with build status and provider upload state.
list_jobs
List jobs with optional name filter.
list_labels
Available nodepool labels — what node types jobs can request.
list_nodes
Nodepool nodes with state (ready, in-use, building), provider, and label. Includes state summary.
list_pipelines
All pipelines with their trigger types.
list_projects
List all projects in a tenant with optional name filter.
list_providers
Nodepool cloud providers with flavors (VM sizes), images, and labels.
list_semaphores
Resource locks with current holders and max capacity. Check when jobs wait unexpectedly.
list_system_events
System events — config updates, reconfigurations, pipeline changes. Useful for "why did my job stop running?"
list_tenants
All tenants with project counts.
promote
Promote changes to the top of a pipeline queue. Use for urgent fixes when gate has a long queue.
reenqueue_buildset
Re-enqueue a buildset — reads project/pipeline/ref from a previous buildset and enqueues it again.
stream_build_console
Live console from RUNNING builds. Connects to Zuul WebSocket, returns last N lines (tail). For completed builds, use tailbuildlog. Optional — requires pip install mcp-zuul[console].
tail_build_log
Fastest failure check. Last N lines of a log (default 50, max 500). More token-efficient than getbuildlog summary mode. Accepts url or uuid.
Tool change history
FAQ
Questions about MCP Zuul MCP Server
- How do I connect MCP Zuul MCP Server to Claude?
- The listing records `claude mcp add zuul -e ZUUL_URL=https://your-zuul.example.com -- uvx mcp-zuul` as its setup step. Run it, then follow the repository's instructions for the client configuration; the listing names Claude Desktop, Claude Code, Cursor as compatible clients.
- Is MCP Zuul MCP Server free?
- The listed licence is Apache-2.0. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.
- What can MCP Zuul MCP Server do?
- MCP Zuul MCP Server documents 40 tools to the agent, including browse_build_logs, check_health, diagnose_build. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.