# AgentStack MCP

> One deterministic reasoning stack for AI agents, behind a single Streamable-HTTP
> endpoint and one API key: **simulate** (ScenarioSim) → **decide** (DecisionMatrix)
> → **compute** (PrecisionCalc), plus cross-domain **composite tools** that chain
> them. 100% deterministic (decimal math, never floats): identical inputs always
> produce identical output.

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

AgentStack bundles three standalone MCP servers into one so an agent installs a
single server, uses one key, and can run reasoning that spans all three domains.
Free tier needs no API key (20 tool calls/day). Paid plans return a key sent as
the `X-API-Key` header.

## Connect

- Endpoint: `https://agentstack-mcp.pages.dev/mcp` (transport: streamable-http)
- Config: `{"mcpServers":{"agentstack":{"url":"https://agentstack-mcp.pages.dev/mcp"}}}`
- Focused subset: add `?profile=finance` (or `decision`, `simulation`) to the URL
- With a key: add `"headers": {"X-API-Key": "ssak_live_..."}`

## Namespaces (24 tools)

- `sim_*` — ScenarioSim: what-if / scenario simulation (run, sensitivity, break-even, compare, templates)
- `decide_*` — DecisionMatrix: multi-criteria decision analysis (decide, score, sensitivity, compare_two, methods)
- `calc_*` — PrecisionCalc: exact finance/business math (metrics, currency, business-days, compound growth, NPV, IRR, loan, depreciation)
- `list_capabilities`, `health_check` — discovery + status

## Composite tools (the reason to use the stack)

- `plan_to_valuation` — simulate a plan, then value its cash-flow stream (NPV/IRR). ScenarioSim → PrecisionCalc.
- `evaluate_options_with_scenarios` — project each option as a scenario, then rank the outcomes. ScenarioSim → DecisionMatrix.
- `stress_test_decision` — stress a scenario assumption across every option and see if the winner holds. ScenarioSim × DecisionMatrix.

## Profiles

Append `?profile=` to the endpoint to reduce tool-selection noise for focused agents:

- `all` (default) — every tool
- `finance` — `calc_*` + `plan_to_valuation`
- `decision` — `decide_*` + `evaluate_options_with_scenarios` + `stress_test_decision`
- `simulation` — `sim_*` + all composites

## Standalone servers

Prefer one domain only? The three products also run on their own:

- ScenarioSim: https://scenariosim-mcp.pages.dev/mcp
- DecisionMatrix: https://decisionmatrix-mcp.pages.dev/mcp
- PrecisionCalc: https://precisioncalc-mcp.pages.dev/mcp

## Pricing

- Free: 20 calls/day, no key
- Starter: $19/mo, 8,000 calls/day (vs ~$36/mo buying the three separately)
- Pro: $59/mo, 80,000 calls/day

One key + one quota covers all three products and the composites.

## Docs

- Homepage: https://agentstack-mcp.pages.dev
- Connection manifest (JSON): https://agentstack-mcp.pages.dev/mcp.json