Walmart Marketplace APIs (deprecated) MCP server

Walmart APIs

<!-- mcp-name: io.github.alyiox/mcp-walmart-ads -->

MCP server for three Walmart Inc. API families, behind one tool surface:

Four tools over 31 apis and 424 operations — discovery, a generic proxy, and a downloader. An agent finds endpoints in the bundled OpenAPI specs and calls them; the server signs, acquires tokens, and builds headers.

walmart:ads:sponsored-products:SBAProfileUpdateV2
└─ retailer ─┘└ line ┘└─── api name ───┘└── operationId ──┘
   └────────── platform ─────────┘  credentials attach here

An operation id alone resolves to a host and an auth model. A matching : suffix means the same surface for another retailer — 13 shared operation ids of 90.

Requirements

is simply unconfigured, and discovery works with no credentials at all.

• Python 3.13+
• Credentials for whichever platforms you use. Configure only those — an absent platform

they serve

• Walmart Connect / Sam's Club — consumer ID, RSA key pair, bearer token
• Walmart Marketplace — client ID + secret, and the advertiser (seller profile) ids

Quick start

Set up your config (see Configuration), then run the server:

# Run directly with uvx (no clone needed)
npx -y @modelcontextprotocol/inspector@latest uvx mcp-walmart-ads

# Or run from source
git clone https://github.com/alyiox/mcp-walmart-ads.git
cd mcp-walmart-ads
uv sync
npx -y @modelcontextprotocol/inspector@latest uv run mcp-walmart-ads

Configuration

config.json MUST live at ~/.config/mcp-walmart-ads/config.json. The server reads it once at startup, so a corrected file REQUIRES a restart.

Windows: ~ maps to %USERPROFILE% (typically C:\Users\), making the full

path %USERPROFILE%\.config\mcp-walmart-ads\config.json.

Create the directory and copy the example:

# Unix-like (macOS, Linux, WSL, …)
mkdir -p ~/.config/mcp-walmart-ads/keys/walmart-ads
cp config.example.json ~/.config/mcp-walmart-ads/config.json

# Windows (PowerShell)
New-Item -ItemType Directory -Force "$env:USERPROFILE\.config\mcp-walmart-ads\keys\walmart-ads"
Copy-Item config.example.json "$env:USERPROFILE\.config\mcp-walmart-ads\config.json"

Shape

platforms.<platform>.regions.<region>.<environment> = <auth block>

is the two-segment prefix an api id starts with, so a config key is literally the value you pass as the platform tool parameter — nothing to translate.

The auth block's shape follows the platform's auth model. There is exactly one shape per platform, so no discriminator field is needed.

Signature platforms (walmart:ads, samsclub:ads):

Shortened. The full README is on GitHub.