# DecisionMatrix MCP

> A deterministic Model Context Protocol (MCP) server that scores, ranks, and
> explains multi-criteria decisions for AI agents. You give it options and
> weighted criteria (plus a score matrix); it returns a fully scored, ranked,
> and explained result — per-criterion breakdowns, the method used, the weights
> applied, and a plain-language explanation. 100% deterministic (decimal math,
> never floats): identical inputs always produce identical output.

Live remote MCP endpoint (Streamable HTTP): https://decisionmatrix-mcp.pages.dev/mcp

Use this instead of asking the model to "weigh the options" itself — LLMs are
inconsistent at multi-criteria scoring. Connect any MCP client to the endpoint
above. Free tier needs no API key (15 tool calls/day). Paid plans return a key
sent as the `X-API-Key` header.

## Connect

- Endpoint: `https://decisionmatrix-mcp.pages.dev/mcp` (transport: streamable-http)
- Client config: `{"mcpServers":{"decisionmatrix":{"url":"https://decisionmatrix-mcp.pages.dev/mcp"}}}`
- With a key: add `"headers": {"X-API-Key": "dmx_live_..."}`

## Tools

- create_decision: rank options against weighted criteria; returns winner, full ranking, per-criterion breakdown, method, weights, and a plain-language explanation
- score_options: normalized scored matrix + ranking (no narrative)
- sensitivity_analysis: how robust the winner is to weight changes; flags criteria that could flip the result and the flip points
- compare_two: head-to-head of two options with per-criterion breakdown
- list_methods: available scoring methods (weighted_sum, weighted_product, topsis)
- health_check: server status and capabilities

## Methods

- weighted_sum — additive weighted scoring (min-max normalized)
- weighted_product — multiplicative (geometric) aggregation
- topsis — distance to ideal / anti-ideal solution

## Docs

- Homepage & pricing: https://decisionmatrix-mcp.pages.dev
- Connection manifest (JSON): https://decisionmatrix-mcp.pages.dev/mcp.json

## Pricing

- Free: 15 calls/day, no key
- Starter: $12/mo, 5,000 calls/day
- Pro: $39/mo, 50,000 calls/day