bhs-mcp

bhs-mcp

An MCP server for Blackhearts & Sparrows product data that enables searching products, retrieving details, listing stores, and managing carts via a sandboxed TypeScript execution environment.

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README

bhs-mcp

MCP server for Blackhearts & Sparrows product data, deployed as a Cloudflare Worker.

Uses the Code Mode pattern — the LLM writes TypeScript that executes against a typed BHS API in a sandboxed Dynamic Worker, rather than calling fixed tools directly.

Architecture

LLM -> code tool -> Dynamic Worker (sandbox)
                        | bhs.search(...)
                     BhsProxy (RPC bridge)
                        |
                     Host Worker
                        |
                     Meilisearch / GraphQL APIs

The sandbox has no network access. All external calls go through the BhsProxy RPC bridge to the host worker.

MCP Tools

Tool Description
schema TypeScript type definitions, method signatures, and example queries
tools Sandbox capabilities, constraints, and guidance
code Execute TypeScript with access to the bhs API object

Sandbox API

// Search products
const wines = await bhs.search({ type: "Wine", country: "France", priceMax: 30 });

// Get product details
const product = await bhs.product("44253");

// List stores
const stores = await bhs.stores();

// Manage cart
const cart = await bhs.cart.create();
await bhs.cart.addItems(cart.uid, [{ sku: "44253", masterSku: "44253", quantity: 6 }]);
const url = bhs.cart.checkoutUrl(cart.uid);

Development

npm install
npm run dev        # wrangler dev
npm run typecheck  # tsc --noEmit
npm run deploy     # wrangler deploy

Deployment

Route: bhs.jackemcpherson.com/mcp*

Depends on @jackemcpherson/bhs-cli for API functions and types.

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