Localhost MCP vs Postman MCP Server
A side-by-side look at the Localhost MCP and Postman MCP Server MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Localhost MCP for developer tools work as a local process; choose Postman MCP Server for developer tools as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Localhost MCP when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You want tools like
list_dev_servers, port_info, kill_server.
Choose Postman MCP Server when
- You need dedicated capabilities in the Developer Tools domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
POSTMAN_API_KEY, POSTMAN_API_BASE_URL. - You want tools like
Minimal, Code, Full.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Developer Tools | Developer Tools |
| Quality signal | 59/100 · Good | 61/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | No auth required | Not declared |
| Pricing | Free | Not declared |
| Required env vars | None listed | POSTMAN_API_KEYPOSTMAN_API_BASE_URL |
| Verified owner | Community listing | Community listing |
| GitHub stars | 4 | 323 |
| Directory activity | 3 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | 5 | 4 |
| Full listing | View Localhost MCP | View Postman MCP Server |
Tools & capabilities
Localhost MCP tools 5
list_dev_serversRead-only. Lists every local development server (next, vite, nuxt, remix, astro, rails, django, flask, express, deno, bun, etc.) currently LISTENING on a TCP port. For each: port, pid, process name, command line, working directory, project name, detected framework, uptime, memory (MB), CPU %, and owning user. Uses `lsof` on macOS/Linux and `netstat` on Windows; on Windows the cwd/framework fields are limited. Takes no arguments. Returns `{ count, servers[] }`.port_infoRead-only. Inspects a single TCP port and reports the dev server holding it (same fields as `list_dev_servers`). If nothing is listening, or the listener is not a recognised dev process, returns `{ port, status: "free" }`. Useful for answering "what's on :3000?" before starting or killing something.kill_serverTerminates a local dev server by `pid` or `port`. DESTRUCTIVE. Safe by default: with no `confirm`, this is a DRY RUN — it reports what it would kill and changes nothing. Pass `confirm: true` to actually terminate: sends SIGTERM, waits up to 5s, then escalates to SIGKILL (or SIGKILL immediately if `force: true`). Refuses PIDs below 1000 and processes that don't look like dev servers. Provide exactly one of `pid` or `port`. Returns what was (or would be) killed and the signal used.find_zombiesRead-only. Flags dev servers that look abandoned — all three of: uptime > 6h AND CPU < 1% AND memory > 100MB. By default it excludes known always-on noise (VS Code server, language servers, other MCP servers, postgres/redis, sidekiq, etc.); set `include_excluded: true` to also list those. Each candidate comes with the reasons it matched. This tool never kills anything — pass results to `kill_server`. Returns `{ count, candidates[] }`.port_conflictRead-only. Diagnoses an `EADDRINUSE` situation: given a port, returns the dev server currently blocking it plus 5 free alternative ports nearby. Use it when a `listen EADDRINUSE` error fires and you want both the culprit and a port to switch to.
Postman MCP Server tools 4
Minimal(Default) Only includes essential tools for basic Postman operations. Ideal for users who want to modify a single Postman element, such as collections, workspaces, or environments.CodeIncludes tools to generate high-quality, well-organized client code from public and internal API definitions. Ideal for users who need to consume APIs or get API context to their agents.FullIncludes all available Postman API tools (100+ tools). Ideal for users who engage in advanced collaboration and Postman's Enterprise features.LearnSearches [Postman Docs](https://learning.postman.com/) for guides, tutorials, and reference content. Ideal for agents who need to discover Postman features, look up API concepts, or find learning resources.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Localhost MCP
{
"mcpServers": {
"hasanjahidul-localhost-mcp": {
"command": "npx",
"args": [
"-y",
"localhost-mcp"
]
}
}
}
Postman MCP Server
{
"mcpServers": {
"postman-mcp-server": {
"command": "npx",
"args": [
"-y",
"@postman/postman-mcp-server"
],
"env": {
"POSTMAN_API_KEY": "YOUR_POSTMAN_API_KEY_HERE",
"POSTMAN_API_BASE_URL": "YOUR_POSTMAN_API_BASE_URL_HERE"
}
}
}
}
Frequently asked questions
Localhost MCP is categorized under Developer Tools and uses a local stdio subprocess. Postman MCP Server belongs to Developer Tools and uses a local stdio subprocess. Pick Localhost MCP for developer tools work and Postman MCP Server for developer tools.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Localhost MCP is listed as free. Auth: no auth required. Postman MCP Server has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add hasanjahidul-localhost-mcp and postman-mcp-server as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Localhost MCP has a quality signal of 59/100 (Good) with 3 views, 0 installs and 4 GitHub stars. Postman MCP Server has 61/100 (Good) with 2 views, 0 installs and 323 GitHub stars.