Render Mustache templates with JSON data and partials via @mukundakatta/mustache-mcp (npx) — 1 tool, sub-1ms

Recipe: Mustache template rendering via @mukundakatta/mustache-mcp

Surface: @mukundakatta/mustache-mcp v0.1.0 Transport: stdio Install: npm install @mukundakatta/mustache-mcp (binary at node_modules/.bin/mcp-mustache) Auth: none — pure in-process, no network calls

Tool: render

Renders a Mustache template string against a JSON view object. Supports optional partials map for {{>name}} includes.

Input schema:

{
  "type": "object",
  "properties": {
    "template": { "type": "string" },
    "view": { "type": "object" },
    "partials": { "type": "object", "description": "Map of partial name → template string." }
  },
  "required": ["template", "view"]
}

Verified traces (3 runs, 2026-07-03)

Run 1 — Simple variable substitution (1ms): Request: { "template": "Hello, {{name}}! Welcome to {{project}}.", "view": { "name": "Alice", "project": "tani" } } Response: "Hello, Alice! Welcome to tani."

Run 2 — Section with list iteration (0ms): Request: { "template": "Users:\n{{#users}}\n- {{name}} ({{role}})\n{{/users}}", "view": { "users": [{ "name": "Alice", "role": "admin" }, { "name": "Bob", "role": "editor" }, { "name": "Carol", "role": "viewer" }] } } Response:

Users:
- Alice (admin)
- Bob (editor)
- Carol (viewer)

Run 3 — Inverted section + triple-stache raw HTML (1ms): Request: { "template": "{{#hasItems}}Found {{count}} items.{{/hasItems}}{{^hasItems}}No items found.{{/hasItems}} Raw: {{{html}}}", "view": { "hasItems": false, "count": 0, "html": "<b>bold</b>" } } Response: "No items found. Raw: <b>bold</b>"

Mustache features confirmed working

• {{var}} — HTML-escaped variable interpolation
• {{{var}}} — raw/unescaped output (triple-stache)
• {{#section}}...{{/section}} — truthy conditional / list iteration
• {{^section}}...{{/section}} — inverted (falsy/empty) conditional
• {{>partial}} — partial template includes via partials map

MCP client pattern (Node.js SDK)

import { Client } from "@modelcontextprotocol/sdk/client/index.js";
import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js";

const transport = new StdioClientTransport({
  command: "node",
  args: ["node_modules/@mukundakatta/mustache-mcp/dist/server.js"],
});
const client = new Client({ name: "my-agent", version: "1.0.0" });
await client.connect(transport);

const result = await client.callTool({
  name: "render",
  arguments: {
    template: "Dear {{name}},\n\n{{#items}}- {{.}}\n{{/items}}",
    view: { name: "Bob", items: ["Task A", "Task B"] }
  }
});
// result.content[0].text → rendered string

Notes

• Sub-millisecond latency — pure in-process string rendering, no I/O
• Backed by the canonical mustache npm package
• Ideal for email templates, code scaffolding, config file generation, and document assembly from agent workflows