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 who work with due diligence, sieve and venture capital and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-03-18 · ★ 5 · #755 OF 945 MAINTAINED OTHER · VERIFIED 2026-09-18

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 #755 of 945 actively-maintained other servers as of 2026-09-18.
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 2026-09-18, 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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