OSV MCP Server

OSV MCP Server

An MCP (Model Context Protocol) server that provides access to the OSV (Open Source Vulnerabilities) database.

Overview

This project implements an SSE-based MCP server that allows LLM-powered applications to query the OSV database for vulnerability information. The server provides tools for:

1. Querying vulnerabilities for a specific package version or commit
2. Batch querying vulnerabilities for multiple packages or commits
3. Getting detailed information about a specific vulnerability by ID

Installation

Prerequisites

• Go 1.21 or later
• Task (optional, for running tasks)
• ko (optional, for building container images)

Building from source

# Clone the repository
git clone https://github.com/StacklokLabs/osv-mcp.git
cd osv-mcp

# Build the server
task build

Usage

MCP Tools

The server provides the following MCP tools:

query_vulnerability

Query for vulnerabilities affecting a specific package version or commit.

Input Schema:

{
  "type": "object",
  "properties": {
    "commit": {
      "type": "string",
      "description": "The commit hash to query for. If specified, version should not be set."
    },
    "version": {
      "type": "string",
      "description": "The version string to query for. If specified, commit should not be set."
    },
    "package_name": {
      "type": "string",
      "description": "The name of the package."
    },
    "ecosystem": {
      "type": "string",
      "description": "The ecosystem for this package (e.g., PyPI, npm, Go)."
    },
    "purl": {
      "type": "string",
      "description": "The package URL for this package. If purl is used, package_name and ecosystem should not be set."
    }
  }
}

query_vulnerabilities_batch

Query for vulnerabilities affecting multiple packages or commits at once.

Input Schema:

{
  "type": "object",
  "properties": {
    "queries": {
      "type": "array",
      "description": "Array of query objects",
      "items": {
        "type": "object",
        "properties": {
          "commit": {
            "type": "string",
            "description": "The commit hash to query for. If specified, version should not be set."
          },
          "version": {
            "type": "string",
            "description": "The version string to query for. If specified, commit should not be set."
          },
          "package_name": {
            "type": "string",
            "description": "The name of the package."
          },
          "ecosystem": {
            "type": "string",
            "description": "The ecosystem for this package (e.g., PyPI, npm, Go)."
          },
          "purl": {
            "type": "string",
            "description": "The package URL for this package. If purl is used, package_name and ecosystem should not be set."
          }
        }
      }
    }
  },
  "required": ["queries"]
}

get_vulnerability

Get details for a specific vulnerability by ID.

Input Schema:

{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "The OSV vulnerability ID"
    }
  },
  "required": ["id"]
}

Examples

Querying vulnerabilities for a package

{
  "package_name": "lodash",
  "ecosystem": "npm",
  "version": "4.17.15"
}

Querying vulnerabilities for a commit

{
  "commit": "6879efc2c1596d11a6a6ad296f80063b558d5e0f"
}

Batch querying vulnerabilities

{
  "queries": [
    {
      "package_name": "lodash",
      "ecosystem": "npm",
      "version": "4.17.15"
    },
    {
      "package_name": "jinja2",
      "ecosystem": "PyPI",
      "version": "2.4.1"
    }
  ]
}

Getting vulnerability details

{
  "id": "GHSA-vqj2-4v8m-8vrq"
}

Development

Running tests

task test

Linting

task lint

Formatting code

task fmt

License

MIT