Sieve MCP

The first MCP server purpose-built for venture capital. Drop a company name into Claude, Cursor, or Windsurf and get a quantified investment memo in 5 minutes - not a ChatGPT summary, a real analyst-grade IMPACT-X assessment with every claim verified against evidence. Its README documents 4 tools, including sieve_screen, sieve_status, sieve_summary.

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

VERIFIED ACTIVE

LAST COMMIT 2026-03-18 · ★ 4 · #680 OF 848 MAINTAINED OTHER · VERIFIED 2026-08-25

MIT · Python servers · how we verify → /methodology

01 · Install Sieve MCP

before you install - you'll need

SIEVE_API_KEY

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add lmwharton-sieve-mcp -- uvx sieve-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "lmwharton-sieve-mcp": {
      "command": "uvx",
      "args": [
        "sieve-mcp"
      ]
    }
  }
}

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

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

03 · What Sieve MCP can do

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

What you can build

With this server connected, an agent can start a Quick Screen - pass a company name, optional website URL, pitch deck text, or description, get the full investment memo - Sieve Score, recommendation, strengths, concerns, evidence, and check how many screens you've used this billing period.

The 4 tools it gives your agent

Extracted from the project's README - what sieve-mcp lets an agent do.

sieve_screen: - Start a Quick Screen - pass a company name, optional website URL, pitch deck text, or description
sieve_status: - Poll analysis progress - see which dimensions are complete and current scores
sieve_summary: - Get the full investment memo - Sieve Score, recommendation, strengths, concerns, evidence
sieve_usage: - Check how many screens you've used this billing period

Latest releases

v0.3.0 · 2026-03-18

What's New · Data room tools: sieve_dataroom_add and sieve_dataroom for managing deal documents · Screen by deal_id: sieve_screen now supports screening existing deals · Investment memo: sieve_memo tool for generating…

04 · Who maintains Sieve MCP

sieve-mcp is maintained by lmwharton. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository: github.com/lmwharton/sieve-mcp
category: other - ranked #680 of 848 actively-maintained other servers as of 2026-08-25.
registry: io.github.lmwharton/sieve-mcp (active, first published 2026-03-03)
packages: pypi:sieve-mcp

06 · Sieve MCP FAQ

Is Sieve MCP still maintained?

Yes - as of 2026-08-25, its last commit was 2026-03-18. We re-verify nightly.

What can Sieve MCP do?

How do I install Sieve MCP?

Run `uvx sieve-mcp`. The README documents one environment variable (SIEVE_API_KEY) to set first. You can also paste the ready-made client config above.

Does Sieve MCP 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 Sieve MCP

Alternatives to Sieve MCP

Maintained other servers if Sieve MCP isn't the fit.

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