Oishii

Oishii UCP Agentic Commerce Endpoint

Universal Commerce Protocol (UCP) endpoint for agent-driven purchasing from the Oishii store, advertised in the merchant profile at https://oishii.com/.well-known/ucp with supported protocol versions 2026-04-08 and 2026-01-23. It declares the cart, checkout, fulfillment, discount, order and catalog capabilities, plus Google Pay and Shopify card payment handlers. The MCP transport at /api/ucp/mcp is gated: an unauthenticated tools/list returns HTTP 422 with JSON-RPC error -32001 invalid_profile_url, because UCP requires the calling agent to present a profile URI. Checkout completion requires contemporaneous human buyer approval.

GitHub

Documentation

📖
Documentation
https://oishii.com/agents.md

Other Resources

🔗
WellKnown
https://raw.githubusercontent.com/api-evangelist/oishii/refs/heads/main/well-known/oishii-well-known.yml

API entry from apis.yml

apis.yml Raw ↑ 
name: Oishii UCP Agentic Commerce Endpoint
description: 'Universal Commerce Protocol (UCP) endpoint for agent-driven purchasing from the Oishii store,
  advertised in the merchant profile at https://oishii.com/.well-known/ucp with supported protocol versions
  2026-04-08 and 2026-01-23. It declares the cart, checkout, fulfillment, discount, order and catalog
  capabilities, plus Google Pay and Shopify card payment handlers. The MCP transport at /api/ucp/mcp is
  gated: an unauthenticated tools/list returns HTTP 422 with JSON-RPC error -32001 invalid_profile_url,
  because UCP requires the calling agent to present a profile URI. Checkout completion requires contemporaneous
  human buyer approval.'
humanURL: https://oishii.com/.well-known/ucp
baseURL: https://oishii.com/api/ucp/mcp
tags:
- Universal Commerce Protocol
- Agent Commerce
- Checkout
- Payments
- MCP
properties:
- type: Documentation
  url: https://oishii.com/agents.md
- type: WellKnown
  url: well-known/oishii-well-known.yml