# Flipr Opportunity Webhook Subscription

> Flipr Opportunity Webhook Subscription is a paid API for AI agents from flipr-x402.fly.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Subscribes an agent to ongoing webhook alerts for betting/arbitrage opportunities on Flipr.bet, creating a persistent webhook resource

## Facts

- Endpoint: POST https://flipr-x402.fly.dev/x402/opportunity/subscribe
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/flipr-x402-fly-dev-2e18249e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jMiuPKFrIJEOdo5lZOyuw

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 flipr-x402-fly-dev-2e18249e -d '<json body>'
```

Example prompt: Set me up to receive webhook alerts at https://myserver.example.com/hooks/flipr whenever a new betting opportunity appears on Flipr.bet — I want to be notified in real time so I can act on it.

## When to prefer this

Use this endpoint when an agent needs to be proactively notified about new opportunities on Flipr.bet without polling repeatedly. Prefer this over polling-based approaches when low-latency reaction to opportunities is important and the agent has a stable callback URL to receive webhooks.

## Known failure modes

- Invalid or unreachable callback URL — subscription creation fails
- Payment failure (insufficient USDC) — 402 response, subscription not created
- Duplicate subscription for same callback URL — may return conflict or duplicate resource
- Malformed request body — 400 Bad Request
- Rate limiting or quota exceeded — 429 Too Many Requests

## How this service works

Subscribe to opportunity webhook alerts (creates ongoing webhook resource)

## Output

A webhook subscription resource is created; the agent receives a subscription ID and confirmation that the provided callback URL will be called whenever a new opportunity is detected on Flipr.bet.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "sub_abc123",
  "agentId": "my-bot-v1",
  "createdAt": "2026-05-08T00:00:00Z",
  "callbackUrl": "https://my-agent.example.com/webhook"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/flipr-x402-fly-dev-2e18249e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from flipr-x402.fly.dev](https://www.zero.xyz/host/flipr-x402.fly.dev/llms.txt)