Stdio MCP Server

A stdio↔HTTP MCP gateway that works in both directions - the same binary is both an MCP-over-HTTP client gateway and, via serve mode, a full MCP-over-HTTP server (with an optional embedded OAuth 2.1 Authorization Server), so it can sit on either end of an MCP connection.

People connecting security tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-23 · ★ 8 · #11 OF 182 MAINTAINED SECURITY · VERIFIED 2026-08-25

MIT · Python servers · how we verify → /methodology

01 · Install Stdio

before you install - you'll need

Set MCP_BEARER_TOKEN, MCP_STDIO_SERVE_TOKEN before connecting.

Claude Code

claude mcp add shigechika-mcp-stdio -- uvx mcp-stdio

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "shigechika-mcp-stdio": {
      "command": "uvx",
      "args": [
        "mcp-stdio"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package mcp-stdio - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.shigechika is GitHub-verified and matches the repo owner

03 · What Stdio can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.43.6 · 2026-08-23

0.43.6 (2026-08-23) · tombstone cap-evicted access tokens (#433 safe subset)

v0.43.5 · 2026-08-23

0.43.5 (2026-08-23) · tombstone every token a family revocation kills, not just the trigger

v0.43.4 · 2026-08-23

0.43.4 (2026-08-23) · start ModernBackendPool's reaper thread even with no ttl or bridge configured (#427)

04 · Who maintains Stdio

MCP Stdio is maintained by shigechika. We track 13 MCP servers from shigechika - 13 actively maintained, 11 combined GitHub stars, oldest repo from Feb 2026. Full record: all servers from shigechika.

J-Quants MCP MCP server for retrieving Japanese stock market data via J-Quants API v2 ★ 2

05 · Facts

repository: github.com/shigechika/mcp-stdio
category: security - ranked #11 of 182 actively-maintained security servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-23)
registry: io.github.shigechika/mcp-stdio (active, first published 2026-03-31 · 76 versions)
packages: pypi:mcp-stdio

06 · Stdio FAQ

What is Stdio?

Is Stdio still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-23 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Stdio?

Run `uvx mcp-stdio`. The README documents 2 environment variables (MCP_BEARER_TOKEN, MCP_STDIO_SERVE_TOKEN) to set first. Set MCP_BEARER_TOKEN, MCP_STDIO_SERVE_TOKEN before connecting. You can also paste the ready-made client config above.

Does Stdio run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Stdio

Alternatives to Stdio

Maintained security servers if Stdio isn't the fit.

Pairs well with

Servers that cover what Stdio doesn't - only shown when the pairing reason fits the companion.

More security MCP servers · Agent Security Scanner MCP · Reversecore MCP · SAST MCP Server · Snyk API & Web MCP Server · Snyk MCP Server

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