# x402-experiments Leaderboard List (lab.paidapis.net)

> x402-experiments Leaderboard List (lab.paidapis.net) is a paid API for AI agents from lab.paidapis.net, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Adds a named entry (with optional URL and note) to a public leaderboard, returning a status confirmation.

## Facts

- Endpoint: POST https://lab.paidapis.net/api/leaderboard/list
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-experiments-leaderboard-list-lab-paidapis-net-9f9f425e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-vmjppnLsGH4jgWDXX7dX

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-experiments-leaderboard-list-lab-paidapis-net-9f9f425e -d '<json body>'
```

Example prompt: Add my project 'NeonPay Dashboard' to the leaderboard with the URL https://neonpay.io and the note 'a real-time x402 payment analytics tool'.

## When to prefer this

Use this endpoint when you want to submit or register a named entry onto a public leaderboard within the x402-experiments ecosystem, especially when a small USDC micropayment gate is acceptable and you want to associate a display name, optional URL, and note with the listing.

## Known failure modes

- Missing required 'name' field returns an error status
- Name exceeding 80 characters may be rejected
- Malformed URL in optional field may cause validation failure
- Network or payment processing failure returns non-2xx response

## How this service works

Leaderboard: pay a tiny fee to appear on a ranked scoreboard (?name=, ?url=, ?note=). No underlying data product — pure visibility. Ranked by cumulative amount paid; paying again bumps your rank.

## Output

Returns a JSON object with a 'status' field (e.g. 'ok' or 'error') and a 'message' field describing the outcome of the listing submission.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "name"
 ],
 "properties": {
  "url": {
   "type": "string",
   "description": "Optional URL to associate with the listing."
  },
  "name": {
   "type": "string",
   "description": "Display name to list (max 80 chars)."
  },
  "note": {
   "type": "string",
   "description": "Optional short note."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "status": {
   "type": "string"
  },
  "message": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-experiments-leaderboard-list-lab-paidapis-net-9f9f425e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from lab.paidapis.net](https://www.zero.xyz/host/lab.paidapis.net/llms.txt)