# x402 Trust: 30-Day Endpoint Watch > x402 Trust: 30-Day Endpoint Watch is a paid API for AI agents from x402-trust.com, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-15). Registers a 30-day active monitoring watch on an x402 endpoint, delivering uptime, compliance, and settlement alerts via webhook or Slack. ## Facts - Endpoint: POST https://x402-trust.com/v1/watch-endpoint-30d - Price: $0.2/call - Payment: x402 - Status: unknown - Last checked: 2026-09-15 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/x402-trust-30-day-endpoint-watch-16603395 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d58uk3hXEloojMlrdDbw9 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-trust-30-day-endpoint-watch-16603395 -d '' ``` Example prompt: Set up a 30-day x402 trust watch on https://api.example.com/v1/thing and send alerts to my webhook at https://my-app.example.com/x402-alerts whenever uptime or 402-compliance events occur, with a liveness sensitivity of 3. ## When to prefer this Choose this endpoint when you need ongoing, 30-day active monitoring of a specific x402 endpoint with push-based alerting (webhook or Slack) or a pollable event log. It is the right choice when you want continuous uptime probing, 402-envelope compliance checking, and USDC settlement anomaly detection — not just a one-time trust score lookup. Use a different endpoint if you only need a free grade or a single full data snapshot without sustained monitoring. ## Known failure modes - Invalid or unreachable endpoint URL returns validation error - Webhook URL fails connection test during setup, blocking watch creation - Missing required delivery fields (webhook_urls or slack_url) returns 422 - Payment of $0.20 USDC not received causes 402 rejection before watch is created - Secret token lost after creation cannot be recovered — only its SHA-256 hash is stored - Watch expiry not renewed within 30 days causes monitoring to lapse ## How this service works Trust, reputation & reliability scores for x402 endpoints. We monitor every listed x402 service 24/7: uptime probes, 402-envelope compliance, price history, and real on-chain USDC settlement volume. Free grade & recommendation for any endpoint, $0.005 for a full data breakdown. ## Output Returns a watch record containing a one-time secret token (for bearer authentication of future management calls), the watch ID, poll URL for reading the append-only event log, edit/cancel/renew URLs, an expiry timestamp 30 days out, and a structured list of next-step instructions for storing the secret, polling events, verifying webhook signatures, editing watch settings, and renewing or cancelling the watch. ## Request schema (JSON Schema) ```json { "type": "object", "properties": { "events": { "type": "array", "items": { "type": "string" } }, "delivery": { "type": "object", "required": [ "webhook_urls", "slack_url" ], "properties": { "slack_url": { "type": "string" }, "webhook_urls": { "type": "array", "items": { "type": "string" } } } }, "endpoint": { "type": "string" }, "liveness_sensitivity_n": { "type": "integer" } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "secret": "wsk_… (shown once — store it now)", "watched": [ { "resource": "https://api.example.com/v1/thing", "endpoint_id": 123 } ], "delivery": { "poll": true, "slack": [], "webhook": [ "https://your-app.example.com/x402-alerts" ] }, "edit_url": "/v1/watch/01J8Z9K7X4QmY9example", "poll_url": "/v1/watch/01J8Z9K7X4QmY9example/events", "watch_id": "01J8Z9K7X4Qmy9example", "renew_url": "/v1/watch/01J8Z9K7X4QmY9example/renew", "cancel_url": "/v1/watch/01J8Z9K7X4QmY9example", "expires_at": 1751328000000, "next_steps": [ { "step": 1, "action": "store_secret", "details": "Store `secret` in a secrets manager. It is shown only once; we only store its SHA-256 hash." }, { "url": "/v1/watch/01J8Z9K7X4QmY9example/events", "step": 2, "action": "poll_events", "method": "GET", "details": "Read the append-only event log. Nothing that happened between two polls is lost.", "headers": { "Authorization": "Bearer wsk_…" }, "cursor_hint": "Start without `since`; then use the highest returned `event_id` as the next `since` value.", "cursor_param": "since" }, { "step": 3, "action": "verify_webhook", "details": "If you configured webhook_url(s), verify every incoming POST: the `x-signature` header must equal `sha256=` + HMAC-SHA256(body) keyed by hex(sha256(secret)) (NOT the raw secret). A `connection_test` ping is sent during setup — see delivery.connection_test.", "enabled": true }, { "url": "/v1/watch/01J8Z9K7X4QmY9example", "step": 4, "action": "edit", "method": "PATCH", "details": "Change webhook/Slack URLs, liveness sensitivity, or subscribed events for free. PATCH with Authorization: Bearer ; new URLs are connection-tested.", "headers": { "Authorization": "Bearer wsk_…" } }, { "url": "/v1/watch/01J8Z9K7X4QmY9example", "step": 5, "action": "cancel", "method": "DELETE", "details": "Stop monitoring early (probing drops to normal cadence immediately). Free, bearer-authed.", "headers": { "Authorization": "Bearer wsk_…" } }, { "url": "/v1/watch/01J8Z9K7X4QmY9example/renew", "step": 6, "action": "renew", "method": "POST", "details": "Extend the watch by 30 days before expires_at. The secret stays the same." } ], "subscribed_events": "all", "probe_interval_sec": 300, "liveness_sensitivity_n": … (truncated) ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-trust-30-day-endpoint-watch-16603395/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from x402-trust.com](https://www.zero.xyz/host/x402-trust.com/llms.txt)