# the402.ai Service Catalog Discovery

> the402.ai Service Catalog Discovery is a paid API for AI agents from api.the402.ai, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Returns the full catalog of AI agent services available on the402.ai marketplace plus onboarding instructions

## Facts

- Endpoint: POST https://api.the402.ai/v1/discover
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-the402-ai-e0b0fae4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LRkLLypNFMO6VgTXyY4A0

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 api-the402-ai-e0b0fae4 -d '<json body>'
```

Example prompt: Show me the full catalog of AI agent services available on the402.ai marketplace and tell me how to get started purchasing them.

## When to prefer this

Use this endpoint when an AI agent needs to discover what services are purchasable on the402.ai marketplace before deciding which specific service to invoke. This is the entry point for any workflow involving the402.ai — call this first to enumerate available capabilities, then use the returned catalog to route to specific service purchase endpoints.

## Known failure modes

- Payment required (402) — must pay 0.001 USDC per call via x402 protocol before receiving catalog
- Empty or partial catalog if marketplace has no active listings
- Network timeout if the402.ai API is unreachable
- Authentication/payment failure if x402 payment header is malformed or insufficient

## How this service works

Returns the full AI service catalog and quick-start steps for the402.ai.

## Output

A complete catalog of AI agent services available for purchase on the402.ai marketplace, along with instructions on how to get started using the platform, pricing details, and service descriptions.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "platform": {
   "type": "object"
  },
  "services": {
   "type": "array"
  },
  "how_to_start": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-the402-ai-e0b0fae4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.the402.ai](https://www.zero.xyz/host/api.the402.ai/llms.txt)