# Karma.Domains Webhook Subscription Ping

> Karma.Domains Webhook Subscription Ping is a paid API for AI agents from api.karma.domains, paid per call via x402, $1.5/call, status unknown (last checked 2026-10-16).

Pings (tests) an existing webhook subscription on the Karma.Domains expired domain service to verify it is active and reachable.

## Facts

- Endpoint: POST https://api.karma.domains/v1/webhooks/%7Bsubscription_id%7D/ping?utm_source=zero.xyz
- Price: $1.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/karma-domains-webhook-subscription-ping-3e8c7815
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XZnPRZFRktqFEmNizpPdf

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 karma-domains-webhook-subscription-ping-3e8c7815 -d '<json body>'
```

Example prompt: Send a test ping to my Karma.Domains webhook subscription ID 'sub_abc123' to confirm it's active and receiving notifications properly.

## When to prefer this

Use this endpoint when you need to verify that a specific Karma.Domains webhook subscription is correctly configured and the target endpoint is reachable — especially after initial setup, server migration, or when troubleshooting missing domain alert notifications. This is a targeted health-check, not a search or data-retrieval operation.

## Known failure modes

- Invalid or non-existent subscription_id returns 404
- Webhook endpoint unreachable or times out returns an error status
- Payment of 1.5 USDC not provided results in 402 Payment Required
- Malformed subscription_id path parameter causes 400 Bad Request

## How this service works

Find expired domain names with high traffic and strong SEO backlinks daily. Boost your revenue by searching our database of 13,000,000+ expired domains from auctions, backorders, and dropped lists—complete with rich metrics and domain age.

## Output

Returns a confirmation that the ping was sent to the specified webhook subscription, indicating whether the subscription endpoint is reachable and responding. Typically returns an HTTP 200 with a success status or an error if the subscription ID is invalid or the endpoint is unreachable.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/karma-domains-webhook-subscription-ping-3e8c7815/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.karma.domains](https://www.zero.xyz/host/api.karma.domains/llms.txt)