Talks directly to Costco's internal GraphQL API to pull warehouse receipts and online orders into Claude. You get tools to list receipts by date range, fetch itemized detail by barcode, look up product names from item numbers, and check order status. The auth flow extracts OAuth2 refresh tokens from your browser's Azure AD B2C session, either semi-automatically via chrome-devtools-mcp or manually from localStorage. Multi-account support lets you separate personal and household member purchases. Useful for expense tracking, price history analysis, or building Costco spending reports without manual CSV exports.
claude mcp add --transport stdio io.github.thehesiod-costco uvx costco