LLM Bridge MCP Server

@sjquant

Basic information

About LLM Bridge MCP Server

A model-agnostic Message Control Protocol (MCP) server that enables seamless integration with various Large Language Models (LLMs) like GPT, DeepSeek, Claude, and more.

#mcp #openai #claude #llm #anthropic #model-context-protocol #mcp-server #pydantic-ai#deepssek-r1

LLM Bridge MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "llm-bridge-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@smithery/cli",
        "install",
        "@sjquant/llm-bridge-mcp",
        "--client",
        "claude"
      ]
    }
  }
}

LLM Bridge MCP Server tools

The text prompt to send to the LLM

Specific model to use (default: "openai:gpt-4o-mini")

Controls randomness (0.0 to 1.0)

Maximum number of tokens to generate

Optional system prompt to guide the model's behavior

Overview

What is LLM Bridge MCP?

LLM Bridge MCP allows AI agents to interact with multiple large language models through a standardized interface. It leverages the Message Control Protocol (MCP) to provide seamless access to different LLM providers, making it easy to switch between models or use multiple models in the same application.

How to use LLM Bridge MCP?

Configure API keys in a .env file (or pass them as environment variables) and then add a server entry to your Claude Desktop or Cursor configuration. The server exposes a single tool, run_llm, which accepts a prompt, optional model name (default openai:gpt-4o-mini), temperature, max tokens, and system prompt.

Key features of LLM Bridge MCP

Unified interface to OpenAI, Anthropic, Google, and DeepSeek models.
Built with Pydantic AI for type safety and validation.
Supports customizable temperature and max tokens parameters.
Provides usage tracking and metrics.
Simple single-tool API: run_llm.

Use cases of LLM Bridge MCP

Let an AI agent query multiple LLM providers from one integration.
Switch models in a running application without reconfiguration.
Compare outputs from GPT, Claude, Gemini, and DeepSeek in the same workflow.
Build a multi-model assistant that can choose the best model per task.

Frequently asked questions

Which LLM providers are supported?

OpenAI (GPT models), Anthropic (Claude models), Google (Gemini models), and DeepSeek.

How do I install LLM Bridge MCP?

You can install it automatically via Smithery (`npx -y @smithery/cli install @sjquant/llm-bridge-mcp --client claude`) or manually by cloning the repository and following the manual installation steps.

How do I configure API keys?

Create a `.env` file in the root directory with keys like `OPENAI_API_KEY`, `ANTHROPIC_API_KEY`, `GOOGLE_API_KEY`, and `DEEPSEEK_API_KEY`. Alternatively, pass them as environment variables in the MCP server configuration.

How do I use LLM Bridge MCP with Claude Desktop or Cursor?

Add a server entry to your Claude Desktop configuration or `.cursor/mcp.json` file, specifying the command `uvx` and the package name `llm-bridge-mcp`, along with the required API keys.

What does the "spawn uvx ENOENT" error mean?

It means the system cannot find the `uvx` executable in your PATH. Find the full path to `uvx` using `which uvx` (macOS/Linux) or `where.exe uvx` (Windows), then update your MCP server configuration to use that full path.

Comments

More AI & Agents MCP servers

scvd.store

seancrecord

scvd.store is an evidence observatory for agentic commerce. Independent signed observation of what other people's endpoints, artifacts and payments actually did among other things. USDC on Base, Arbitrum One, World Chain

OpenZiti / LLM-Gateway

openziti

NetFoundry LLM Gateway is an OpenAI-compatible API proxy that routes requests across multiple LLM providers using zero-trust networking. Zero trust LLM gateway. OpenAI-compatible proxy with semantic routing and load bala

OpenZiti MCP Gateway

openziti

NetFoundry MCP Gateway enables secure, isolated access to Model Context Protocol (MCP) tools across distributed systems without exposing public endpoints. Zero trust gateway for MCP servers. Aggregate, filter, and secure

AON — Agent Offer Network

AON

AON MCP connects AI agents to real, buyable products and services with live pricing and tracked links—enabling builders to earn developer revenue share from attributed clicks and conversions.

AskOne: Live Q&A and Polls

phuryn

Run free live audience Q&A and polls from your agent: start an AskOne room, add and launch a poll, approve or hide questions and mark them answered, close the room, then read the questions as a FAQ draft and get the resu