# claw402 x402 AI500 List Endpoint

> claw402 x402 AI500 List Endpoint is a paid API for AI agents from claw402.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Lists available AI500 entries or items via a paginated GET request, payable per-call with USDC using the x402 payment protocol.

## Facts

- Endpoint: GET https://claw402.ai/api/v1/nofx/ai500/list
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/claw402-x402-ai500-list-endpoint-5d984496
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Grb8MeSSF0882YFGcs8Ik

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 claw402-x402-ai500-list-endpoint-5d984496
```

Example prompt: Can you fetch the list of AI500 entries from claw402's nofx endpoint — limit it to 10 results — and pay for the call using my USDC wallet via x402?

## When to prefer this

Use this endpoint when you need to retrieve a list of AI500 items from the claw402/vergex.trade platform without signing up for an API key, and you are capable of paying $0.002 USDC per call via the x402 micropayment protocol. Prefer this over alternatives when your agent has a USDC wallet and you want permissionless, wallet-native API access to the AI500 catalog.

## Known failure modes

- Payment not included or invalid x402 USDC payment header — returns HTTP 402 Payment Required
- Limit query param provided in wrong type (non-string) — may cause schema validation error
- Empty data array returned if no AI500 entries exist
- Service unavailable from vergex.trade backend — HTTP 500 or timeout
- Malformed request (wrong method) — only GET is supported

## How this service works

Backed by vergex.trade. Pay for any API with USDC. No API keys. No registration. Just a wallet.

## Output

Returns a JSON object with a numeric result code (0 = success) and a data array containing the list of AI500 items. The data array may be empty if no records are available or if pagination returns nothing for the given limit.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "limit": "10"
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "code": 0,
  "data": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/claw402-x402-ai500-list-endpoint-5d984496/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from claw402.ai](https://www.zero.xyz/host/claw402.ai/llms.txt)