app.vercel.proof-stack-lake/proofstack

ProofStack MCP Server

Remote Model Context Protocol server for ProofStack — a library of researched indie product cases with published pricing, revenue disclosures where available, and source links. Research depth, freshness, and translation coverage vary by case; this is not a financial audit.

Endpoint (Streamable HTTP, no auth required):

https://proof-stack-lake.vercel.app/mcp

Tools

Example client configuration

{
  "mcpServers": {
    "proofstack": {
      "url": "https://proof-stack-lake.vercel.app/mcp"
    }
  }
}

Works with any MCP client that supports remote Streamable HTTP servers (Claude Desktop / Claude Code, Cursor, etc.).

Source code

The server implementation is open (Apache-2.0) in src/: mcp.ts is the exact JSON-RPC/tool logic running at the endpoint above, and pricingBenchmark.ts is the benchmark computation. The data source contract is documented in database-contract.ts; the underlying dataset is open too (CC BY 4.0) at proofstack-dataset.

Data honesty rules

• Revenue that is not publicly disclosed is returned as unknown — never estimated.
• Acquisition narratives are researched from first-party sources; cases that have not been researched yet say so explicitly instead of returning template text.
• Cases include available source URLs with evidence grades (A/B/C). Check each case’s research status and sources before relying on its claims.

Open dataset: the full case library and benchmarks are downloadable at proofstack-dataset (CC BY 4.0).

More machine-readable context: llms.txt · Pricing benchmarks · Case library

Free tool: AI-visibility check

Can GPTBot and ClaudeBot actually read your site? Run the free check (robots rules, llms.txt, sitemap, server rendering, JSON-LD) and get a shareable scorecard + README badge: https://proof-stack-lake.vercel.app/ai-check

Local / evaluation adapter

Requires Node.js 22 or later. Run node stdio.mjs to expose the same public tools over newline-delimited JSON-RPC stdio. This adapter forwards tool requests to the public endpoint above; it does not require a database credential, read local files, or host a separate dataset. Only JSON-RPC responses go to stdout. An endpoint outage returns a protocol error instead of invented data. The adapter supports this endpoint's JSON responses; it is not a general-purpose SSE proxy.

For Glama: build steps [], CMD arguments ["node", "stdio.mjs"], Node.js 24, no environment variables. Publishing an evaluation release does not require paid hosting.