Rubrkit MCP MCP server

An official MCP server that exposes Rubrkit's AI instruction grading, rewriting, and evaluation tools. It allows agents to run audits against a 10-dimension rubric, manage artifact bundles, apply prompt compaction, and generate proof reports for AI outputs.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Rubrkit

MCP endpoint (Streamable HTTP)

https://www.rubrkit.com/api/v1/mcp

Vendor documentation

What you can do with it

Grade AI prompts and agent specs against a rubric
Rewrite weak instructions to improve clarity
Run evaluations and export proof reports
Manage artifact bundles and compaction

Tools advertised by the last live check:

rubrkit_search_api_docs
rubrkit_read_api_doc
rubrkit_read_openapi_contract
rubrkit_create_artifact_bundle
rubrkit_list_artifact_bundles
rubrkit_read_artifact_bundle
rubrkit_delete_artifact_bundle
rubrkit_hard_delete_artifact_bundle
rubrkit_upload_artifact_files
rubrkit_list_artifact_files
rubrkit_read_artifact_file
rubrkit_update_artifact_file
rubrkit_compact_artifact_file
rubrkit_estimate_deep_compaction
rubrkit_apply_deep_compaction
rubrkit_start_audit
rubrkit_list_audits
rubrkit_read_audit
rubrkit_apply_audit_rewrite
rubrkit_poll_job
rubrkit_list_job_events
rubrkit_list_artifact_bundle_versions
rubrkit_restore_artifact_bundle_version
rubrkit_list_file_versions
rubrkit_restore_file_version
rubrkit_run_evals
rubrkit_list_evals
rubrkit_read_eval
rubrkit_export_proof_report
rubrkit_read_proof_report
rubrkit_list_golden_cases
rubrkit_add_golden_case
rubrkit_retire_golden_case
rubrkit_create_drift_monitor
rubrkit_list_drift_monitors
rubrkit_read_drift_observations
rubrkit_run_drift_check
rubrkit_set_drift_monitor_status
rubrkit_record_outcome
rubrkit_read_input_drift
rubrkit_read_validity_drift

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http rubrkit-mcp https://www.rubrkit.com/api/v1/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add rubrkit-mcp --url https://www.rubrkit.com/api/v1/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable rubrkit-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "rubrkit-mcp": {
      "url": "https://www.rubrkit.com/api/v1/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "rubrkit-mcp": {
      "type": "streamableHttp",
      "url": "https://www.rubrkit.com/api/v1/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start rubrkit-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "rubrkit-mcp": {
      "type": "http",
      "url": "https://www.rubrkit.com/api/v1/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http rubrkit-mcp https://www.rubrkit.com/api/v1/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "rubrkit-mcp": {
      "url": "https://www.rubrkit.com/api/v1/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "rubrkit-mcp": {
      "serverUrl": "https://www.rubrkit.com/api/v1/mcp"
    }
  }
}

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