KG-NINJA Purchase API
Quote and paid verification operations
KG-NINJA Purchase API is one of 10 APIs that KG-NINJA publishes on the APIs.io network, described by a machine-readable OpenAPI specification.
Tagged areas include Purchase. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and a getting-started guide.
This API exposes 4 operations across 4 paths, and defines 28 schemas. It is described by OpenAPI 3.2.0, at version 0.4.3.
Requests are made against a single base URL, /.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
KG-NINJA Purchase API declares
1 security scheme
for authenticating requests.
It accepts HTTP bearer tokens (signed anonymous registration receipt) (agentRegistration).
agentRegistration— Optional 15-minute service-local receipt used only to inspect its own registration claim. It grants no API access and does not authorize payment.
Paths & Operations 4
Across 4 paths, the API surfaces 4 operations — 1 GET, 3 POST. Each is listed below with its method, path, parameters, and response codes.
Quote and paid verification operations
Schemas 28
The contract defines 28 schemas that model the data the API accepts and returns. The most detailed are PaidVerificationBinding (17 properties), VerificationReceiptPayload (9 properties), QuoteResponse (9 properties), X402PaymentRequirement (7 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 KG-NINJA 9
Other APIs KG-NINJA publishes across the network.
This is an independent, third-party profile of KG-NINJA Purchase API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
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