Plug Claude into your Walmart Marketplace account.

The same RSA signing dance, every time

Every team selling on Walmart Marketplace writes the same RSA-signing glue — load PEM, build canonical string, sign, base64, attach four headers, generate a fresh correlation ID, time it to epoch ms, retry on 5xx, paginate. None of it is hard. All of it is annoying.

This package is the assembled, tested version. It exposes seven read-only Walmart Marketplace endpoints as MCP tools, with the signing and pagination handled for you. Add three env vars to your MCP client config and you're done.

The seven read-only tools

• walmart_search_products — by query, page, page_size
• walmart_get_product — full item detail by SKU
• walmart_search_orders — date range, status filter
• walmart_get_order — full purchase order detail
• walmart_get_inventory — qty on hand by SKU
• walmart_get_pricing — current price + strikethrough
• walmart_get_settlement_report — fetch by report id

Every tool returns the standard JSON envelope. Auth signing uses RSA-2048 with SHA-256 (PKCS#1 v1.5 padding) per Walmart's public docs. Cryptography is handled by the audited cryptography library — the only added runtime dep over mcp + requests. 61 unit tests cover signature verification, retry behavior, and the tool layer.

Who this is for

This MCP server is for you if:

• You sell on Walmart Marketplace and want Claude (or any MCP client) to be able to answer questions about your catalog, orders, and settlement reports without you writing glue.
• You'd rather configure three env vars than maintain an internal Walmart client library.

It's not for you if:

• You don't sell on Walmart Marketplace.
• You need feeds / write operations. v0.1 is read-only by design.