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.
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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