# Block Merchant Custom Attributes API

**Canonical:** https://apis.io/apis/block/block-merchantcustomattributes-api/  
**Provider:** Block — https://apis.io/providers/block/  
**Base URL:** https://connect.squareup.com  
**Documentation:** https://developer.squareup.com/

Block Merchant Custom Attributes API is one of 43 APIs that [Block](https://apis.io/providers/block/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include MerchantCustomAttributes. The published artifact set on APIs.io includes an OpenAPI specification.

The MerchantCustomAttributes API from Block — 6 operation(s) for merchantcustomattributes.

## Operations (11)

| Method | Path | Summary |
|---|---|---|
| GET | `/v2/merchants/custom-attribute-definitions` | ListMerchantCustomAttributeDefinitions |
| POST | `/v2/merchants/custom-attribute-definitions` | CreateMerchantCustomAttributeDefinition |
| DELETE | `/v2/merchants/custom-attribute-definitions/{key}` | DeleteMerchantCustomAttributeDefinition |
| GET | `/v2/merchants/custom-attribute-definitions/{key}` | RetrieveMerchantCustomAttributeDefinition |
| PUT | `/v2/merchants/custom-attribute-definitions/{key}` | UpdateMerchantCustomAttributeDefinition |
| POST | `/v2/merchants/custom-attributes/bulk-delete` | BulkDeleteMerchantCustomAttributes |
| POST | `/v2/merchants/custom-attributes/bulk-upsert` | BulkUpsertMerchantCustomAttributes |
| GET | `/v2/merchants/{merchant_id}/custom-attributes` | ListMerchantCustomAttributes |
| DELETE | `/v2/merchants/{merchant_id}/custom-attributes/{key}` | DeleteMerchantCustomAttribute |
| GET | `/v2/merchants/{merchant_id}/custom-attributes/{key}` | RetrieveMerchantCustomAttribute |
| POST | `/v2/merchants/{merchant_id}/custom-attributes/{key}` | UpsertMerchantCustomAttribute |

## Machine-readable artifacts (1)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/block/refs/heads/main/openapi/block-merchantcustomattributes-api-openapi.yml

## Other Block APIs (12)

- [Block Catalog API](https://apis.io/apis/block/block-catalog-api/)
- [Block Customers API](https://apis.io/apis/block/block-customers-api/)
- [Block Merchants API](https://apis.io/apis/block/block-merchants-api/)
- [Block Orders API](https://apis.io/apis/block/block-orders-api/)
- [Block Payments API](https://apis.io/apis/block/block-payments-api/)
- [Block Booking Custom Attributes API](https://apis.io/apis/block/block-bookingcustomattributes-api/)
- [Block Bookings API](https://apis.io/apis/block/block-bookings-api/)
- [Block Cards API](https://apis.io/apis/block/block-cards-api/)
- [Block Channels API](https://apis.io/apis/block/block-channels-api/)
- [Block Checkout API](https://apis.io/apis/block/block-checkout-api/)
- [Block Customer Custom Attributes API](https://apis.io/apis/block/block-customercustomattributes-api/)
- [Block Devices API](https://apis.io/apis/block/block-devices-api/)

## Tags

MerchantCustomAttributes

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/block/block-merchantcustomattributes-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/block/.