@johnhenry/math-plus-mcp

An MCP server exposing the math family's math engines as agent-callable tools: exact symbolic computation (@johnhenry/math's Symbolic CAS) plus guarded numeric tensor/linalg/stats conveniences. Fast-starting, pure JS, no kernel, no license check — run it anywhere Node runs.

# stdio transport — works with any MCP host
npx math-plus-mcp

# e.g. with Claude Code:
claude mcp add math-plus -- npx math-plus-mcp

Tools (v1)

| Tool | What it does | |---|---| | symbolic_parse | Parse/normalize an expression; returns text, LaTeX, free variables | | symbolic_simplify | Exact symbolic simplification | | symbolic_differentiate | d/d(variable), exact | | symbolic_integrate | Indefinite (symbolic) or definite (numeric, with lower/upper) | | symbolic_solve | Solve lhs = rhs or zero-equals form for a variable (polynomials ≤ degree 6) | | symbolic_evaluate | Numeric evaluation with variable bindings | | linalg_solve | Solve A·x = b (LU with partial pivoting) | | tensor_pipeline | Chain of ops from a closed op table over a matrix — not code execution | | stats_summary | count/mean/std/min/max/median for a list of numbers |

Security posture (v1 scope, by design)

• No arbitrary code execution anywhere. Expression strings go through Symbolic.parse — a closed parser over a fixed grammar, not eval. Numeric tools dispatch over a fixed op table; unknown ops are rejected with the list of what's allowed.
• Stateless per call. No sessions, no notebook state, nothing persists between calls.
• Size-capped inputs (1e6 elements) so a mis-typed request errors fast instead of exhausting host memory.
• Tool failures return MCP isError results with the underlying message — never protocol-level exceptions.

What v1 does NOT do

• No matrix arguments between pipeline steps (e.g. matmul with a second operand) — the pipeline is unary-chain only.
• No ODE solving, Taylor series, or step-by-step derivations, though @johnhenry/math supports them — kept out of v1 to hold the tool list small and legible for agents; file an issue if you want one promoted.
• No HTTP/SSE transport — stdio only.