Block Payments API
Process and manage payments
Block Payments API is one of 5 APIs that Block publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Payments. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.
This API exposes 3 operations across 2 paths, and defines 6 schemas. It is described by OpenAPI 3.0.3, at version 2026-01-22.
Requests are made against 2 base URLs: https://connect.squareup.com/v2, https://connect.squareupsandbox.com/v2.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 2
Block Payments API declares
2 security schemes
for authenticating requests.
It accepts HTTP bearer tokens (BearerAuth).
It supports OAuth 2.0 (OAuth2) using the authorizationCode flow, exposing 6 scopes.
By default, every request must be authenticated.
BearerAuth— Personal access token for Square API
Paths & Operations 3
Across 2 paths, the API surfaces 3 operations — 2 GET, 1 POST. Each is listed below with its method, path, parameters, and response codes.
Process and manage payments
Schemas 6
The contract defines 6 schemas that model the data the API accepts and returns. The most detailed are Payment (8 properties), CreatePaymentRequest (4 properties), Money (2 properties), ListPaymentsResponse (2 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from Block 4
Other APIs Block publishes across the network.
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