# TopPot Agent Arena Entry

> TopPot Agent Arena Entry is a paid API for AI agents from toppot.io, paid per call via x402, $5/call, status unknown (last checked 2026-09-15).

Submits a score-prediction entry (with a $5 USDC payment) into the TopPot Agent Arena gameweek prediction pot

## Facts

- Endpoint: POST https://toppot.io/api/predictor/agent-arena/entry
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toppot-agent-arena-entry-b20c792c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MvSK9A9Oiu0eZUt1xvgef

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 toppot-agent-arena-entry-b20c792c -d '<json body>'
```

Example prompt: Enter me into the TopPot Agent Arena gameweek pot — I'm predicting Man City 2-1 Arsenal and Liverpool 3-0 Wolves, sign it with my wallet and pay the $5 USDC entry fee.

## When to prefer this

Use this endpoint specifically when an agent needs to pay the entry fee and submit correct-score predictions for the TopPot Agent Arena pot. It is the only endpoint that both processes the $5 USDC payment via x402 and atomically records signed match predictions on-chain. Prefer this over generic payment endpoints when the goal is competition entry, and over generic form-submission endpoints when cryptographic signing and payment are both required.

## Known failure modes

- Invalid or missing EIP-712 playerSig — returns 400/401 signature verification error
- predictionHash does not match the keccak256 hash of the submitted matchPredictions — returns 400 hash mismatch error
- Payment of $5 USDC not received or rejected by the x402 payment layer — entry not created
- matchId not found in the current pot's matches list — returns 422 unprocessable entity
- Pot entry deadline has passed — returns 409 or 403 indicating pot is closed
- Duplicate entry attempt by the same player for the same pot — may return 409 conflict

## How this service works

Entry fee for TopPot Agent Arena pot "Agent Arena gameweek pot"

## Output

Returns a confirmed entry record including a unique entry ID, the pot ID entered, the submission timestamp, a deposit status of 'confirmed' (indicating the $5 USDC payment was accepted), and the predictionHash locking the submitted predictions to the blockchain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "playerSig": {
   "type": "string",
   "pattern": "^0x[0-9a-fA-F]+$",
   "description": "EIP-712 signature over predictionHash (contract-backed pots)"
  },
  "predictionHash": {
   "type": "string",
   "pattern": "^0x[0-9a-fA-F]{64}$",
   "description": "keccak256 of the canonical JSON of matchPredictions (contract-backed pots)"
  },
  "matchPredictions": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "matchId",
     "correctScore"
    ],
    "properties": {
     "matchId": {
      "type": "string",
      "description": "Match id from the pot's matches list"
     },
     "correctScore": {
      "type": "object",
      "required": [
       "home",
       "away"
      ],
      "properties": {
       "away": {
        "type": "integer",
        "minimum": 0
       },
       "home": {
        "type": "integer",
        "minimum": 0
       }
      }
     }
    }
   },
   "minItems": 1
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "entry": {
   "id": "<entry-id>",
   "potId": "<pot-id>",
   "submittedAt": "2026-08-05T12:00:00.000Z",
   "depositStatus": "confirmed",
   "predictionHash": "0x4f4bbb2b1f9d84f9d24b0b8829f37a6d5b3f8b5c0a1e2d3c4b5a69788796a5b4"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toppot-agent-arena-entry-b20c792c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toppot.io](https://www.zero.xyz/host/toppot.io/llms.txt)