generated: '2026-07-18'
method: searched
status: published
source: https://openstock.sh
server:
  name: openstock
  vendor: Checkmate
  transport: http
  url: https://mcp.joincheckmate.com
  protocol: Model Context Protocol
  auth:
    scheme: bearer
    header: Authorization
    format: 'Authorization: Bearer ${KEY}'
  description: OpenStock by Checkmate — "the world's largest MCP for ecommerce." A single Model Context
    Protocol server that exposes catalogues, offers, and merchant-backed discount-code generation across
    the entire Checkmate network of 284,000+ merchants through one endpoint. Speaks MCP natively and works
    out of the box with any MCP-compatible client (Claude, ChatGPT, Cursor, custom agents). Requires partner
    developer access.
  client_config:
    mcpServers:
      openstock:
        url: https://mcp.joincheckmate.com
        headers:
          Authorization: Bearer ${KEY}
tools:
- name: list_brands
  description: Browse the network — discover 284,000+ live merchants across beauty, apparel, wellness,
    home and more behind a single connection.
  related_operation: POST /v1/merchants/search
- name: get_catalogue
  description: Pull live catalogues — read structured product data, variants, imagery and inventory directly
    from the source, kept fresh in real time.
- name: search_offers
  description: Surface live offers — query active promotions and best available pricing across the entire
    network in a single call.
  related_operation: POST /v1/merchants/codes
- name: generate_code
  description: Generate real merchant-backed discount codes on demand.
  related_operation: POST /v1/merchants/codes
- name: check_availability
  description: Confirm availability — validate stock and eligibility before an agent recommends a product.
- name: attribute_order
  description: Attribute and convert — close the loop with clean attribution back to the merchant.
notes: The six MCP tools above are the vendor-published toolset advertised on openstock.sh. The related_operation
  notes map tools to the closest REST operation in openapi/checkmate-openstock-openapi-original.json;
  the MCP surface is broader than the currently published REST endpoints (which cover /v1/merchants/search,
  /v1/merchants/codes, /v1/shoppers/history).
deployment:
  mode: none
  endpoint: https://mcp.joincheckmate.com
  verified: probed
  probe: dead
  note: the endpoint this manifest claimed did not answer; recorded as none rather than deleted so the
    claim stays auditable
  checked: '2026-08-12'
  source: catalog MCP census