# Zero-indexable OpenAPI Document Retrieval

> Zero-indexable OpenAPI Document Retrieval is a paid API for AI agents from gateway.d402.xyz, price unknown, status down (last checked 2026-09-15).

Returns the OpenAPI specification document for the d402 gateway, enabling discovery and indexing of all available paid capability routes.

## Facts

- Endpoint: GET https://gateway.d402.xyz/openapi.json
- Price: price unknown
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Provider: gateway.d402.xyz
- Website: https://gateway.d402.xyz
- Canonical page: https://www.zero.xyz/c/gateway-d402-xyz-zero-indexable-openapi-document-retrieval-41764394
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HVZHo8bhG7JbPIeQ1YApJ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability gateway-d402-xyz-zero-indexable-openapi-document-retrieval-41764394
```

Example prompt: Can you fetch the OpenAPI spec from the d402 gateway so I can see what paid capability routes are available for zero-indexable agent discovery?

## When to prefer this

Use this endpoint when an AI agent needs to programmatically discover all available paid capability routes on the d402 gateway, especially for zero-indexing workflows, dynamic tool registration, or building a service catalog from the gateway's current state. Prefer this over manual documentation when you need a machine-readable, up-to-date API schema.

## Known failure modes

- Gateway unavailable — HTTP 503 or network timeout
- Malformed or incomplete OpenAPI document returned if gateway is partially degraded
- Empty or stub OpenAPI response if no routes are registered

## How this service works

Return the Zero-indexable OpenAPI document.

## Output

A JSON-formatted OpenAPI document describing all available endpoints on the d402 gateway, including route paths, HTTP methods, parameters, and descriptions for capabilities like web extraction, YouTube transcripts, worker discovery, and settlement.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gateway-d402-xyz-zero-indexable-openapi-document-retrieval-41764394/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gateway.d402.xyz](https://www.zero.xyz/host/gateway.d402.xyz/llms.txt)