---
title: "Subscribe to x402 endpoint drift alerts"
method: POST
path: "/api/alerts/x402"
---

# Subscribe to x402 endpoint drift alerts

`POST /api/alerts/x402`

Capture email or webhook subscription for score drops, manifest changes, price drift, and lost certification.

## Request body

- AlertSubscriptionRequest
  - `email` string
  - `endpoint` string, required — Paid API endpoint URL the alert subscription should monitor for x402 readiness changes.
  - `events` string[]
  - `webhook_url` string

## Response `202`

Subscription accepted

## Other responses

- `400` — Invalid subscription

---

[API](https://skmtc.net/ontarioprotocol/apis/ontario-protocol-x402-api.md) · [All operations](https://skmtc.net/ontarioprotocol/apis/ontario-protocol-x402-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/ontarioprotocol/ontario-protocol-x402-api/revisions/54384a1c4bf3/schema)