# Contribution Exchange [Health: Active]

**Category:** 💻 Developer Tools  
**Repository:** https://github.com/SunrisesIllNeverSee/sigrank-app  
**GitHub Stars:** 6  
**npm Downloads (last month):** 3099  
**Views:** 0  
**Installs:** 0  
**Upvotes:** 0  
**Directory Page:** https://allmcps.com/mcp/contribution-exchange

## Description
Contribution Exchange MCP: domain discovery, policies, preflight, proposals, and signals.

## Claude Desktop Quick Installation
Install path detected from listing signals. Uses `npx` (confidence: high):

```json
"mcpServers": {
  "contribution-exchange": {
    "command": "npx",
    "args": ["-y","sigrank"]
  }
}
```

## Documentation

## What Contribution Exchange MCP server does

The supplied repository material does not describe a product or package named Contribution Exchange. It documents SignalAF and SigRank, an application built around Upsilon, a privacy-preserving measurement engine for AI operator sessions. The documented web application provides a public leaderboard, operator profiles, wiki, account, billing, and ingest surfaces.

The README identifies `sigrank-mcp` as a separate repository in the same ecosystem. That project is described as a compatibility instrument that extracts four token measurements, computes results locally, and can optionally submit them to SigRank. The README does not provide its MCP tool names, protocol configuration, connection targets, or implementation details. It therefore cannot establish that those capabilities belong to the Contribution Exchange MCP server.

## How it works

The documented Upsilon engine accepts four token counts: input, output, cache creation, and cache read. It uses those values to calculate Yield and other cascade measurements, then places operators into signal classes and ranks them by Yield. The stated formula is `Υ = (cache_read × output) / input²`.

The README says session message content is not used and that submissions contain token measurements rather than transcript content. It also describes local calculation and an optional submission flow for the separate `sigrank` command-line package. These details explain the SignalAF ecosystem, not a confirmed Contribution Exchange implementation.

## Limitations and notes

Contribution Exchange MCP server cannot be evaluated from this material as an MCP integration. No supported external service, tool list, transport, configuration schema, environment variables, client compatibility information, or installation instructions are provided for that name. The README also does not show a Contribution Exchange package or identify the repository as its source.

The repository carries an MIT license, but the excerpt does not clarify whether that license applies to a separate Contribution Exchange server. It does show commands for the unrelated `sigrank` package, including `npx sigrank`, enrollment, submission, and dry-run inspection. Those commands should not be presented as installation steps for Contribution Exchange MCP server without documentation from the relevant project.

_Full upstream README: https://allmcps.com/mcp/contribution-exchange/readme_