Liquid MCP Server

Connect your AI agent to anything - with no connector to write or maintain. Point Liquid at a URL or a database and it works out the interface for you: discovers its shape, maps it to the fields you asked for, and handles auth, pagination and normalization - typed records, no client code. When the upstream drifts, it re-maps and keeps going. The same small API - fetch · query · write · sense - reaches web APIs…

People who work with agent tools and api integration and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-06-09 · ★ 2 · #224 OF 278 MAINTAINED API INTEGRATION · VERIFIED 2026-09-18

Python servers · how we verify → /methodology

01 · Install Liquid

before you install - you'll need

OPENAI_API_KEY

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add ertad-family-liquid -- uvx liquid-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "ertad-family-liquid": {
      "command": "uvx",
      "args": [
        "liquid-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license no standard license detected - usage rights unclear; check the repo before commercial use

pypi package liquid-mcp - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.ertad-family is GitHub-verified and matches the repo owner

03 · What Liquid can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.67.0 · 2026-06-04

Email adapter - an agent's mail senses & hands · Mail joins the modality set: read a mailbox, perceive new mail as it arrives (sense), and send - over raw IMAP/SMTP or the Gmail API. · Raw IMAP/SMTP - no new dependency…

v0.36.1 · 2026-05-27

Docs synced with the shipped MCP server / built-in LLM backends / file persistence (docs previously said bring-your-own-LLM only). Registry discoverability: uvx config + mcp-name marker. No code changes.

v0.36.0 · 2026-05-27

Liquid now connects essentially any model - hosted, local, or custom. · CallableBackend - wrap any callable (messages -> str, sync/async, or returning LLMResponse) into an LLMBackend. Universal escape hatch: plug in…

04 · Who maintains Liquid

Liquid is maintained by ertad-family. It's the only MCP server we track from this author; the repo dates to Apr 2026.

05 · Facts

repository
github.com/ertad-family/liquid
category
API integration - ranked #224 of 278 actively-maintained API integration servers as of 2026-09-18.
registry
io.github.ertad-family/liquid (active, first published 2026-05-27 · 2 versions)
packages
pypi:liquid-mcp

06 · Liquid FAQ

What is Liquid?

Connect your AI agent to anything - with no connector to write or maintain. Point Liquid at a URL or a database and it works out the interface for you: discovers its shape, maps it to the fields you asked for, and handles auth, pagination and normalization - typed records, no client code. When the upstream drifts, it re-maps and keeps going. The same small API - fetch · query · write · sense - reaches web APIs…

Is Liquid still maintained?

Yes - as of 2026-09-18, its last commit was 2026-06-09. We re-verify nightly.

How do I install Liquid?

Run `uvx liquid-mcp`. The README documents one environment variable (OPENAI_API_KEY) to set first. You can also paste the ready-made client config above.

Does Liquid run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Liquid

Alternatives to Liquid

Maintained API integration servers if Liquid isn't the fit.

  1. LetsFG - Flights & Hotels Search and book flights and hotels: hundreds of airlines, plus bookable hotel rates. ★ 2,033 · 2026-09-14
  2. Microsoft 365 MCP Server Interact with Microsoft 365 and Office services through the Microsoft Graph API. ★ 980 · 2026-09-17
  3. Idea Reality MCP Pre-build reality check. Scans GitHub, HN, npm, PyPI, Product Hunt - returns 0-100 signal. ★ 817 · 2026-08-11
  4. Tapo MCP MCP server for discovering and controlling TP-Link Tapo smart home devices via AI Agents ★ 803 · 2026-09-17
  5. Sqz Pre-injection context compression for coding agents. Zero LLM calls, zero telemetry, offline-safe. ★ 625 · 2026-09-15
  6. Sv Number MCP Server Phone numbers for AI agents: order a private number, read the SMS verification code, hand it back. ★ 550 · 2026-08-10

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