OSV Advisory MCP Server

An MCP server that queries OSV.dev for package vulnerabilities, batch-audits dependency lists, and fetches full advisory records. It supports STDIO or Streamable HTTP transports and provides tools to query package versions, commit hashes, and ecosystem lists.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by cyanheads

Vendor documentation

What you can do with it

Query a package version by name/ecosystem/version or PURL
Batch-audit up to 1000 package versions in one call
Query known vulnerabilities for a full Git commit hash
Fetch the full advisory record for a single OSV vulnerability ID

Source and maintenance

Community listingRegistry 0.4.0

mcp-registry: io.github.cyanheads/osv-advisory-mcp-server@0.4.0 Source repository

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@cyanheads/osv-advisory-mcp-server 0.4.0

npmnpx

@cyanheads/osv-advisory-mcp-server package definition

{
  "version": "0.4.0",
  "transport": "stdio",
  "identifier": "@cyanheads/osv-advisory-mcp-server",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "OSV_REQUEST_TIMEOUT_MS",
      "format": "string",
      "default": "10000",
      "description": "HTTP request timeout in milliseconds for OSV.dev API calls."
    },
    {
      "name": "OSV_BATCH_CONCURRENCY",
      "format": "string",
      "default": "10",
      "description": "Maximum number of concurrent OSV.dev requests issued by osv_query_batch."
    },
    {
      "name": "OSV_QUERY_MAX_PAGES",
      "format": "string",
      "default": "10",
      "description": "Maximum number of OSV.dev result pages followed per package or commit before marking a result truncated."
    },
    {
      "name": "MCP_LOG_LEVEL",
      "format": "string",
      "default": "info",
      "description": "Sets the minimum log level for output (e.g., 'debug', 'info', 'warn')."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "osv-advisory-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/osv-advisory-mcp-server@0.4.0"
      ],
      "env": {
        "OSV_REQUEST_TIMEOUT_MS": "<YOUR_OSV_REQUEST_TIMEOUT_MS>",
        "OSV_BATCH_CONCURRENCY": "<YOUR_OSV_BATCH_CONCURRENCY>",
        "OSV_QUERY_MAX_PAGES": "<YOUR_OSV_QUERY_MAX_PAGES>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "osv-advisory-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/osv-advisory-mcp-server@0.4.0"
      ],
      "env": {
        "OSV_REQUEST_TIMEOUT_MS": "<YOUR_OSV_REQUEST_TIMEOUT_MS>",
        "OSV_BATCH_CONCURRENCY": "<YOUR_OSV_BATCH_CONCURRENCY>",
        "OSV_QUERY_MAX_PAGES": "<YOUR_OSV_QUERY_MAX_PAGES>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "osv-advisory-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/osv-advisory-mcp-server@0.4.0"
      ],
      "env": {
        "OSV_REQUEST_TIMEOUT_MS": "<YOUR_OSV_REQUEST_TIMEOUT_MS>",
        "OSV_BATCH_CONCURRENCY": "<YOUR_OSV_BATCH_CONCURRENCY>",
        "OSV_QUERY_MAX_PAGES": "<YOUR_OSV_QUERY_MAX_PAGES>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "osv-advisory-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/osv-advisory-mcp-server@0.4.0"
      ],
      "env": {
        "OSV_REQUEST_TIMEOUT_MS": "<YOUR_OSV_REQUEST_TIMEOUT_MS>",
        "OSV_BATCH_CONCURRENCY": "<YOUR_OSV_BATCH_CONCURRENCY>",
        "OSV_QUERY_MAX_PAGES": "<YOUR_OSV_QUERY_MAX_PAGES>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>"
      }
    }
  }
}

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