Create merchant custom attribute definitionBeta

POST

/v2/merchants/custom-attribute-definitions

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 application. A custom attribute definition specifies the key, visibility, schema, and other properties for a custom attribute. After the definition is created, you can call UpsertMerchantCustomAttribute or BulkUpsertMerchantCustomAttributes to set the custom attribute for a merchant.

Permissions:MERCHANT_PROFILE_WRITE

Guide

Create merchant custom attribute definition

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Request body

Example code

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custom_attribute_definition

Required

The custom attribute definition to create. Note the following:

With the exception of the Selection data type, the schema is specified as a simple URL to the JSON schema definition hosted on the Square CDN. For more information, including supported values and constraints, see Supported data types.
name is required unless visibility is set to VISIBILITY_HIDDEN.

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idempotency_key

string

A unique identifier for this request, used to ensure idempotency. For more information, see Idempotency.

Max Length

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Response fields

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custom_attribute_definition

The new custom attribute definition.

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errors

Any errors that occurred during the request.

curl https://connect.squareup.com/v2/merchants/custom-attribute-definitions \ -X POST \ -H 'Square-Version: 2024-12-18' \ -H 'Authorization: Bearer ACCESS_TOKEN' \ -H 'Content-Type: application/json' \ -d '{ "custom_attribute_definition": { "key": "accepted_payment_methods", "name": "Accepted Payment Methods", "description": "The accepted payment methods for this merchant.", "visibility": "VISIBILITY_READ_ONLY", "schema": { "$schema": "https://developer-production-s.squarecdn.com/meta-schemas/v1/selection.json", "type": "array", "maxItems": 3, "uniqueItems": true, "items": { "names": [ "credit_card", "check", "cash" ] } } } }'

{ "custom_attribute_definition": { "key": "accepted_payment_methods", "name": "Accepted Payment Methods", "description": "The accepted payment methods for this merchant.", "version": 1, "updated_at": "2023-05-05T15:57:23.211Z", "schema": { "$schema": "https://developer-production-s.squarecdn.com/meta-schemas/v1/selection.json", "maxItems": 3, "type": "array", "uniqueItems": true, "items": { "names": [ "credit_card", "check", "cash" ], "enum": [ "46efa55a-1f1d-467f-9733-468f881a4f20", "954998e1-b666-43a4-baf3-89cb87afe25a", "610fa590-70cd-4ec9-b64c-1dad6ba3c8f9" ] } }, "created_at": "2023-05-05T15:57:23.211Z", "visibility": "VISIBILITY_READ_ONLY" } }