Enable AI Agents to fix build failures from CircleCI.
This profile describes CircleCI’s older standalone MCP package, rather than its current hosted service or CLI-integrated MCP server.
CircleCI has published a security and deprecation notice for the standalone package. Check that notice before keeping an old package configuration in an active client. The replacement routes have different runtimes and authentication, so copying a new endpoint into an old local command is not a complete migration.
Use CircleCI Hosted for the documented remote CI-run workflow. Use the current CircleCI CLI MCP when the work requires the CLI’s broader local configuration and administrative surface. CircleCI Server users should follow the vendor’s migration guidance for their installation.
After adding the selected replacement, confirm the authenticated account and read a known project run. Check the returned branch and job before asking for a rerun. Keep the old configuration disabled once the replacement is working so tool names and actions do not resolve to an unintended server.
This historical URL is retained for existing links. It should not be read as a recommendation to begin a new installation with the deprecated standalone package.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| Example | "Run the pipeline for https://app.circleci.com/pipelines/github/org/repo/123" |
| Text | default): Returns flaky test details in text format |
| File | requires FILE_OUTPUT_DIRECTORY env var): Creates a directory with flaky test details |
| Step-by | step execution details |
{
"mcpServers": {
"circleci-mcp-server": {
"command": "npx",
"args": [
"-y",
"@circleci/mcp-server-circleci@latest"
],
"env": {
"CIRCLECI_TOKEN": "YOUR_CIRCLECI_TOKEN",
"CIRCLECI_BASE_URL": "https://circleci.com",
"MAX_MCP_OUTPUT_LENGTH": "50000"
}
}
}
}From the project documentation. Replace placeholders and example paths before connecting.
| Variable | Description | Required |
|---|---|---|
| CIRCLECI_TOKEN | Declared in the maintainer’s client configuration. | Check documentation |
| CIRCLECI_BASE_URL | Declared in the maintainer’s client configuration. | Yes |
| MAX_MCP_OUTPUT_LENGTH | Declared in the maintainer’s client configuration. | Optional |
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