Read and score Opik traces, experiments, datasets and prompts from your AI assistant.
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Opik MCP is an MCP server that read and score Opik traces, experiments, datasets and prompts from your AI assistant. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 63/100 on MCPpedia's security, maintenance and efficiency rubric.
Config is the same across clients - only the file and path differ.
{
"mcpServers": {
"opik": {
"args": [
"-y",
"opik-mcp",
"--apiKey",
"YOUR_API_KEY"
],
"command": "npx"
}
}
}Are you the author?
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Read and score Opik traces, experiments, datasets and prompts from your AI assistant.
This server supports HTTP transport. Be the first to test it - help the community know if it works.
Five weighted categories - click any category to see the underlying evidence.
No known CVEs.
Checked opik-mcp against OSV.dev.
workspace-infoStatic resource providing workspace information
opik://workspace-info
projectsDynamic resource template for projects with pagination
opik://projects/{page}/{size}
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The official Model Context Protocol (MCP) server for Opik, the open-source LLM observability and evaluation platform, built by Comet. Plug your AI host (Claude Code, Cursor, VS Code Copilot, Codex, opencode, or any MCP client) directly into your Opik workspace: read traces, log scores, and save prompt versions, all from the chat.
Built for LLM engineers who already run Opik and want to drive it from the same AI assistant they code with.
You: "Which traces in project 'demo' failed today?"
Claude: → list(entity_type="trace", project_name="demo") → "Three traces failed…"
You: "Score trace 7f2e… 0.9 on helpfulness with reason 'great recovery'."
Claude: → write(score.create) → done
One command sets Opik up in the AI clients on your machine, Claude Code
included. It finds your Opik (the one saved in ~/.opik.config, one running on
localhost, or it asks which), registers the MCP server, installs the Opik skill
pack, and checks the connection. On Opik Cloud there is no API key to handle:
your client signs in in the browser. It needs uv
and no Opik SDK:
uvx opik@latest mcp configure
Without a terminal, as from a coding agent or a script, name the client:
uvx opik@latest mcp configure --ai-client claude-code --skills
--ai-client also takes codex, cursor, vscode and opencode. Run that
way it uses the Opik saved in ~/.opik.config, API key included, or one
answering on localhost, and otherwise stops and asks for --deployment.
A coding agent asked to "install opik mcp" gets the full steps, including what
to ask the user, from uvx opik-mcp@latest --help. They are the same as
Install with a coding agent below.
Registering the server by hand, with the client commands under Set it up by hand, skips the check of which Opik you use and the skill pack, so it is for clients the installer doesn't support.
| Your Opik | Server | Transport | Sign-in |
|---|---|---|---|
Opik Cloud (www.comet.com) | the hosted server, run by Comet | Streamable HTTP | in the browser (OAuth); no API key |
| Self-hosted Comet, open-source Opik | the local server, this package | stdio | env vars; an API key only where the deployment needs one |
Clients load MCP servers when a session starts, so start a new session afterwards.
Setup guide, troubleshooting and FAQ: comet.com/docs/opik/mcp-server.
Comet runs the server at https://www.comet.com/opik/api/v1/mcp. Your client
connects over HTTP and opens a browser sign-in the first time. There is nothing
to install, no API key, and no workspace to set: the server works in the
workspace you pick when you sign in. After adding it, start a new session and
ask: "list my Opik projects".
The Quick start command sets this up for Claude Code, Codex, Cursor, VS Code Copilot and opencode, with the skill pack. In Claude Code, the plugin does the same in one command. The buttons below add it to Cursor or VS Code in one click; other ways to register it by hand are under Set it up by hand.