buy_set_default_address

Connect to https://mcp.agentcard.sh/mcp with the user’s connection token (or a buy_token for org-owned accounts). Behavior: idempotent.

Not in the default tools/list. It is still callable by exact name, and appears when the client sends the x-expert-tools: 1 header.

What it does

Set the default delivery address on a linked merchant account. address_id is the id from buy_addresses; new orders default to it.

Field	Type	Description
`merchant` (required)	string
`address_id` (required)	string	the id from buy_addresses

None.

{
  "tool": "buy_set_default_address",
  "arguments": {
    "merchant": "\u2026",
    "address_id": "\u2026"
  }
}