Perplexity Research

A Model Completion Protocol (MCP) service for internet research using Perplexity AI.

Overview

ResearchMCP is a service that provides internet research capabilities through the MCP protocol. It exposes a "research" tool that allows querying Perplexity AI's API for in-depth, up-to-date information on a wide range of topics.

Features

• Internet research through Perplexity AI
• Integration with MCP protocol for tool discovery and invocation
• Graceful error handling with degraded mode
• Configurable through environment variables
• Structured logging

Requirements

• Go 1.18 or later
• Perplexity AI API key

Configuration

The service is configured through environment variables:

Variable	Description	Required	Default
PERPLEXITY_API_KEY	API key for Perplexity AI	Yes	-
PERPLEXITY_MODEL	Model to use for research	No	sonar-medium-online
PERPLEXITY_TIMEOUT	Timeout in seconds for API requests	No	90
PERPLEXITY_MAX_RETRIES	Maximum number of retry attempts	No	2
PERPLEXITY_INITIAL_BACKOFF	Initial backoff time in seconds	No	1
PERPLEXITY_MAX_BACKOFF	Maximum backoff time in seconds	No	10

Usage

1. Set up the required environment variables (you can use a .env file)
2. Build and run the service:

go build
./ResearchMCP

Example .env file

PERPLEXITY_API_KEY=your_api_key_here
PERPLEXITY_MODEL=sonar-medium-online
PERPLEXITY_TIMEOUT=120
PERPLEXITY_MAX_RETRIES=3
PERPLEXITY_INITIAL_BACKOFF=2
PERPLEXITY_MAX_BACKOFF=15

API

Research Tool

Name: research

Input Schema:

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "description": "The research query or question"
    }
  },
  "required": ["query"]
}

Example Request:

{
  "name": "research",
  "arguments": {
    "query": "What is the current state of quantum computing?"
  }
}

Example Response:

{
  "content": [
    {
      "type": "text",
      "text": "Comprehensive research report on quantum computing...\n\nSources:\n- https://example.com/source1\n- https://example.com/source2"
    }
  ]
}

Development

Project Structure

• main.go: Application entry point
• config.go: Configuration handling
• logger.go: Logging infrastructure
• perplexity.go: Perplexity API integration
• structs.go: Data structures
• context.go: Context handling

Code Style

Run formatting and linting with the provided scripts:

./run_format.sh
./run_lint.sh

License

This project is licensed under the MIT License - see the LICENSE file for details.