CircleCI (official)
Last tested 2026-10-22
Score 75/100 · Last tested 2026-10-22 · Version tested 0.20.0 · Package @circleci/mcp-server-circleci · Repo CircleCI-Public/mcp-server-circleci
Summary: CircleCI (official) completed an MCP handshake without credentials and exposed 13 tools; it is deprecated or archived, so prefer a maintained alternative.
Test results
| Test | Result | Points | Evidence |
|---|---|---|---|
| install | pass | 20 | npm install @circleci/mcp-server-circleci (Node 20, Linux) succeeded in 2s. |
| handshake | pass | 30 | MCP initialize + tools/list over stdio succeeded with no credentials; 13 tools listed in 4.9s. |
| maintenance | fail | 0 | Deprecated on npm: Deprecated: use CircleCI's hosted MCP server or CircleCI CLI MCP instead. See https://circleci.com/docs/guides/toolkit/circleci-mcp-overview/. |
| docs | pass | 15 | README over 3,000 chars; install instructions present; mcpServers config example present. Automated check of the package's own README (README shipped in npm package). |
| license | pass | 10 | Apache-2.0 (OSI-approved). |
Local-model readiness
Schema context cost: ~11,711 tokens for 13 tools (51,033 bytes) · about 143% of an 8k context. Method: tiktoken cl100k_base over compact JSON of name+description+inputSchema (approximate).
Small-model friendly (schema heuristic, not a model result): low.
Small-model task runs: Not yet tested.
Not tested
We did not test behavior with real credentials, security, or performance under load. These are planned; see methodology.
Tools listed
get_build_failure_logs, find_flaky_tests, get_latest_pipeline_status, get_job_test_results, config_helper, run_pipeline, list_followed_projects, rerun_workflow, download_usage_api_data, find_underused_resource_classes, run_rollback_pipeline, list_component_versions, list_artifacts
Config used in our test
{
"mcpServers": {
"circleci-official": {
"command": "npx",
"args": [
"-y",
"@circleci/mcp-server-circleci"
]
}
}
}FAQ
Is CircleCI (official) deprecated?
Yes. @circleci/mcp-server-circleci is deprecated on npm (as of 2026-10-22). npm says: "Deprecated: use CircleCI's hosted MCP server or CircleCI CLI MCP instead. See https://circleci.com/docs/guides/toolkit/circleci-mcp-overview/"
What replaces CircleCI (official)?
None identified. We have no evidence of a maintained replacement yet.
Does CircleCI (official) need an API key?
No. It completed an MCP handshake with no credentials and listed 13 tools.
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