Liquid MCP Server

by ertad-familyio.github.ertad-family/liquidv0.2.0

Connect agents to any REST API on the fly: maps the API once, then fetches typed data deterministically without per-call LLM use. Self-hosted.

3Pythonstdioofficial registry

context tax

queued

security

queued

cold start

queued

freshness

Slowing4mo ago

Install Liquid MCP server

claude mcp add liquid -e OPENAI_API_KEY='<openai-api-key>' -e GEMINI_API_KEY='<gemini-api-key>' -e ANTHROPIC_API_KEY='<anthropic-api-key>' -- uvx liquid-mcp

{
  "mcpServers": {
    "liquid": {
      "command": "uvx",
      "args": [
        "liquid-mcp"
      ],
      "env": {
        "OPENAI_API_KEY": "<openai-api-key>",
        "GEMINI_API_KEY": "<gemini-api-key>",
        "ANTHROPIC_API_KEY": "<anthropic-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "liquid": {
      "command": "uvx",
      "args": [
        "liquid-mcp"
      ],
      "env": {
        "OPENAI_API_KEY": "<openai-api-key>",
        "GEMINI_API_KEY": "<gemini-api-key>",
        "ANTHROPIC_API_KEY": "<anthropic-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "liquid": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "liquid-mcp"
      ],
      "env": {
        "OPENAI_API_KEY": "<openai-api-key>",
        "GEMINI_API_KEY": "<gemini-api-key>",
        "ANTHROPIC_API_KEY": "<anthropic-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "liquid": {
      "command": "uvx",
      "args": [
        "liquid-mcp"
      ],
      "env": {
        "OPENAI_API_KEY": "<openai-api-key>",
        "GEMINI_API_KEY": "<gemini-api-key>",
        "ANTHROPIC_API_KEY": "<anthropic-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
OPENAI_API_KEY	—	yes	OpenAI (or compatible) API key for discovery
OPENAI_BASE_URL	—	—	OpenAI-compatible base URL, e.g. local Ollama/vLLM
GEMINI_API_KEY	—	yes	Google Gemini API key (alternative)
ANTHROPIC_API_KEY	—	yes	Anthropic API key (alternative)
LIQUID_ALLOW_WRITES	—	—	Set to 1 to expose the liquid_execute write tool (database insert/update/delete). Off by default — read-only.

Freshness

Slowing — last maintenance signal 4mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-06-09 · 4mo ago · GitHub
Latest release
2026-06-04 · 4mo ago · GitHub · v0.67.0
Package published
no data · npm/PyPI
Registry entry updated
2026-05-28 · 4mo ago · official registry · v0.2.0

FAQ

›How do I install the Liquid MCP server in Claude Code?

Run: claude mcp add liquid -e OPENAI_API_KEY='<openai-api-key>' -e GEMINI_API_KEY='<gemini-api-key>' -e ANTHROPIC_API_KEY='<anthropic-api-key>' -- uvx liquid-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Liquid require an API key?

Yes. It expects OPENAI_API_KEY, GEMINI_API_KEY, ANTHROPIC_API_KEY, of which 3 are secrets.

›Can I use Liquid as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Liquid in the official MCP registry?

Yes, as io.github.ertad-family/liquid.