[](https://litport.net/free-proxy) # Litport Free Proxy MCP Server A local, stdio [Model Context Protocol](https://modelcontextprotocol.io) server that gives an MCP client (Claude Desktop, Claude Code, or any other MCP-compatible agent) three bounded, read-only tools over Litport's public free-proxy snapshot: list verified HTTP, SOCKS4, and SOCKS5 proxies, pick the highest-ranked ones, and summarize the current snapshot. It never forwards traffic, never accepts arbitrary URLs from tool callers, and exposes no write or side-effecting tools; it is a thin wrapper around [`@litportnet/free-proxy-sdk`](https://github.com/litportnet/free-proxy-sdk). ## Install / Use with Claude Desktop, Claude Code, and other MCP clients Add this to your client's MCP server configuration (for Claude Desktop, `claude_desktop_config.json`; for Claude Code, `.mcp.json` or `claude mcp add`): ```json { "mcpServers": { "free-proxy": { "command": "npx", "args": ["-y", "@litportnet/free-proxy-mcp"] } } } ``` No installation step is required beyond having Node.js 20+ available; `npx` fetches and runs the package on demand. To install it explicitly instead: ```sh npm install -g @litportnet/free-proxy-mcp ``` ## Tools All three tools are read-only and share the same underlying filters. `country` is a two-letter ISO 3166-1 alpha-2 code (case-insensitive). `checkedWithinMin` limits results to proxies checked within the last 1-1440 minutes. | Tool | Description | Inputs | | --- | --- | --- | | `list_proxies` | List verified free proxies matching filters. | `protocol` (`http`\|`socks4`\|`socks5`), `country`, `anonymity` (`transparent`\|`anonymous`\|`elite`\|`unknown`), `https` (boolean), `maxLatencyMs` (int ≥ 0), `minUptime7d` (int 0-100), `minChecks7d` (int ≥ 0), `checkedWithinMin` (int 1-1440, default 30), `limit` (int 1-50, default 10) | | `pick_best_proxies` | Return the highest-ranked proxies matching filters. | `count` (int 1-25, default 5), plus the same filters as `list_proxies` except `limit` | | `proxy_snapshot_stats` | Summarize the current proxy snapshot. | `checkedWithinMin` (int 1-1440, default 30), `protocol`, `country` | `list_proxies` and `pick_best_proxies` return a `count` and a `proxies` array of normalized records exactly as returned by the SDK. `proxy_snapshot_stats` returns the total matching count, counts by protocol and anonymity, the top 10 countries by count, the share of matching proxies that support HTTPS, latency min/median/p90/max across records that report latency, how many records have a known seven-day uptime, and the newest and oldest `lastChecked` timestamps. Every response includes a `disclaimer` field. Errors from the underlying SDK (invalid filters, request timeouts, malformed or stale snapshots) are returned as `{ isError: true, content: [...] }` rather than thrown, and never include a stack trace. ## Environment | Variable | Default | Purpose | | --- | --- | --- | | `LITPORT_FREE_PROXY_API_URL` | the SDK's built-in snapshot URL | Absolute `http://` or `https://` URL for the snapshot endpoint. The server validates this and exits with a clear error on startup if it is set to something else. | | `LITPORT_FREE_PROXY_TIMEOUT_MS` | `10000` | Per-request timeout in milliseconds passed to the SDK client. | ## Test ```sh npm install npm test ``` `npm test` runs `node --test` over `test/*.test.mjs`: in-process unit tests that drive the server through the MCP SDK's in-memory transport with an injected `@litportnet/free-proxy-sdk` client, and an end-to-end test that spawns the server over stdio against a local HTTP fixture server, plus a regression test that launches the server through a `bin` symlink the way `npx` does. ## Resources - [Free proxy list](https://litport.net/free-proxy) - [API documentation](https://litport.net/docs/free-proxy-api) - [SDK source](https://github.com/litportnet/free-proxy-sdk) Free proxies are for testing only. Never route credentials, cookies, payment data, or private data through them.