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CreateMerchantCustomAttributeDefinition

An MCP tool from the Square API server, hosted on mcp.hjlabs.in.

CreateMerchantCustomAttributeDefinition Creates a merchant-related custom attribute definition for a Square seller account. Use this endpoint to define a custom attribute that can be associated with a merchant connecting to your… [POST /v2/merchants/custom-attribute-definitions]

Name on the gateway: square_api__create_merchant_custom_attribute_definition · may change things.

Parameters

NameTypeDescription
custom_attribute_definition requiredobjectThe custom attribute definition to create. Note the following: - With the…
idempotency_keystringA unique identifier for this request, used to ensure idempotency. For more…

How to call it

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments
{
  "name": "square_api__create_merchant_custom_attribute_definition",
  "arguments": {
    "custom_attribute_definition": "…"
  }
}

Or connect the Square API server directly, which lists 308 tools including this one:

Run in your terminal
claude mcp add --transport http hj-square-api https://mcp.hjlabs.in/mcp/square-api \
  --header "Authorization: Bearer YOUR_API_KEY"

Try asking

Use the createmerchantcustomattributedefinition tool with custom_attribute_definition set to ….

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