# x402 List Seat (Ping-Verify Enqueue)

> x402 List Seat (Ping-Verify Enqueue) is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.09/call, status unknown (last checked 2026-10-22).

Enqueues a public origin URL for ping-verify listing verification and returns its current listing status on the x402 ecosystem registry.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/listseat?utm_source=zero.xyz
- Price: $0.09/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-list-seat-ping-verify-enqueue-50756401
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9qgILBs5rUxhBjAzbkQ2s

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 x402-list-seat-ping-verify-enqueue-50756401
```

Example prompt: Can you check if https://myapi.example.com is listed on the x402 registry, and if not, queue it for ping-verify so we can get it recognized?

## When to prefer this

Use this endpoint when you need to verify or register a public API origin's listing status within the x402 ecosystem specifically. It is the canonical tool for x402 ping-verify enqueuing and listing diagnostics on OpenX402-facilitated networks. Prefer this over generic uptime monitors or other x402 tools when you need the 'listed' boolean from the OpenX402 registry and want the URL queued for active verification.

## Known failure modes

- Missing or invalid 'origin' query parameter returns an error in the errors array
- Unpaid request (no valid x402 payment header) returns HTTP 402 with EIP-3009 payment details
- Origin URL is not publicly reachable, so ping-verify may fail silently
- listed=false with queued=true means it is pending but not yet confirmed
- Non-OpenX402 facilitators are rejected — only OpenX402 is supported as facilitator

## How this service works

Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.

## Output

Returns a JSON object indicating whether the origin is currently listed (listed: true/false), whether it was queued for ping-verify (queued: true/false), the origin URL echoed back, and any errors encountered. The 'listed' field is never fabricated — it reflects actual registry state.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    }
   }
  },
  "inputSchema": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Example paid List Seat JSON. listed=true is never invented.",
  "errors": [],
  "listed": false,
  "origin": "https://openclawproductions.com",
  "queued": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-list-seat-ping-verify-enqueue-50756401/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from openclawproductions.com](https://www.zero.xyz/host/openclawproductions.com/llms.txt)