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Observability - official Arize server

Phoenix Remote MCP server

MCP server built into Arize Phoenix at the /mcp path of any Phoenix instance, letting agents read and act on traces, spans, datasets, experiments and prompts through Phoenix's REST API, plus read-only SQL and GraphQL queries. By default it exposes code-mode tools that search the operation catalog and run sandboxed Python that chains operations. It runs locally from arize-phoenix (pypi) with OAuth or API key auth.

Last verified 7 tools3 sources

Install

Claude Code

About Claude Code
Terminal
claude mcp add --transport http phoenix http://localhost:6006/mcp

Codex

About Codex
TOML
[mcp_servers.phoenix]
url = "http://localhost:6006/mcp"
bearer_token_env_var = "PHOENIX_API_KEY"

Cursor

About Cursor
JSON
{
  "mcpServers": {
    "phoenix": {
      "url": "http://localhost:6006/mcp"
    }
  }
}

VS Code

JSON
{
  "servers": {
    "phoenix": {
      "type": "http",
      "url": "http://localhost:6006/mcp"
    }
  }
}

Generic

JSON
{
  "mcpServers": {
    "phoenix": {
      "url": "http://localhost:6006/mcp",
      "headers": {
        "Authorization": "Bearer <your-api-key>"
      }
    }
  }
}

Tools

search
Find available operations by query, ranked by relevance
tags
Browse operations by category (projects, spans, datasets and more)
list_tools
List the full operation catalog
get_schema
Fetch parameter schemas for specific operations before calling them
execute
Run sandboxed Python that chains operations with call_tool
load_skill
Load a Phoenix skill's instructions before working in its domain
load_skill_reference
Load a reference file from a skill already loaded

As documented on October 17, 2026. A running server reports its current list through tools/list.

Notes and caveats

  • Remote URL is your own Phoenix endpoint plus /mcp (http://localhost:6006/mcp locally); requires Phoenix 19.0.0 or later.
  • Auth is browser OAuth via Phoenix's built-in authorization server, with Phoenix API keys as a bearer-token fallback; omit auth if your Phoenix has none.
  • Claude Desktop needs a publicly reachable Phoenix.
  • PHOENIX_ENABLE_MCP_SERVER=false removes /mcp and PHOENIX_ENABLE_MCP_CODE_MODE=false exposes each operation as its own tool instead of code mode.
  • Arize also hosts a separate no-login Phoenix Docs MCP at https://arizeai-433a7140.mintlify.app/mcp.

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Related reading

FAQ

What does the Phoenix Remote MCP server do?

MCP server built into Arize Phoenix at the /mcp path of any Phoenix instance, letting agents read and act on traces, spans, datasets, experiments and prompts through Phoenix's REST API, plus read-only SQL and GraphQL queries. By default it exposes code-mode tools that search the operation catalog and run sandboxed Python that chains operations. The vendor documents 7 tools, including search, tags, list_tools and get_schema.

How do I add the Phoenix Remote MCP server to Claude Code?

Run claude mcp add --transport http phoenix http://localhost:6006/mcp, copied from Arize's docs. This page also has snippets for Codex, Cursor, VS Code and Generic.

Does the Phoenix Remote MCP server need authentication?

Yes, OAuth or API key. Transport: Streamable HTTP. Status: Beta, last checked October 17, 2026.

Sources

Last verified against 3 Arize pages, then re-checked independently.

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