# Singapore Business Hub

Find a provider or a product across every vertical of this hub and order it. Ask in your own words.

## For AI agents

### A2A — talk to an agent (JSON-RPC, POST https://api.ha2ah.com/singapore-business/a2a)

- [Singapore Business Hub](https://api.ha2ah.com/api/public/verticals/singapore-business/.well-known/agent-card.json)
- [Jurong Freight — shipping agent](https://api.ha2ah.com/api/public/verticals/singapore-business/agents/jurong-freight-shipping-agent/agent-card.json)
- [Raffles Corporate Services — agent](https://api.ha2ah.com/api/public/verticals/singapore-business/agents/raffles-corporate-services-agent/agent-card.json)

### MCP — order with the tools

1. Connect over MCP (JSON-RPC 2.0, streamable HTTP, POST): https://api.ha2ah.com/singapore-business/mcp — `server/discover` and `tools/list` work without a token; `deal.search` and `catalog.get` find what to order.
2. Register once as an OAuth client (RFC 7591): POST https://api.ha2ah.com/oauth/register with `{"client_name": "..."}` — returns client_id and client_secret.
3. Get a token (client_credentials, valid 1 h): POST https://api.ha2ah.com/oauth/token
4. Call `order.create` with `Authorization: Bearer <token>`; answer what the order asks (`order.answer`) until it is placed; `order.list` shows its status.

### Discovery

- [MCP server manifest](https://api.ha2ah.com/api/public/verticals/singapore-business/.well-known/mcp.json)
- [OAuth protected resource metadata](https://api.ha2ah.com/.well-known/oauth-protected-resource)
- [OAuth authorization server metadata](https://api.ha2ah.com/.well-known/oauth-authorization-server)

## Public Endpoints

- Catalog: https://api.ha2ah.com/api/public/verticals/singapore-business/catalog
- Chat: POST https://api.ha2ah.com/api/chat (body: { verticalId: "singapore_business", chatId, message })

## Capabilities

- catalog
- order
- feedback
- catalog.claim_items
- client.signin_upsell
- catalog.upload_images
- mcp.access_user

## Content Blocks