# SiteSignal Webhook Readiness

> SiteSignal Webhook Readiness is a paid API for AI agents from phases-prot-shine-royal.trycloudflare.com, paid per call via x402, $0.05/call, status down (last checked 2026-09-16).

Generates source-linked webhook integration-readiness evidence from bounded public documentation for a given docs URL and event use case.

## Facts

- Endpoint: GET https://phases-prot-shine-royal.trycloudflare.com/x402/webhook-readiness
- Price: $0.05/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitesignal-webhook-readiness-802f3f2b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8GDPRmpZrojzIHVCl6Pzg

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 sitesignal-webhook-readiness-802f3f2b
```

Example prompt: Check whether Stripe's public docs show webhook readiness for payment intent succeeded events — use https://stripe.com/docs/webhooks as the docs URL, the event use case is 'payment.intent.succeeded', and my receiver stack is Node.js Express.

## When to prefer this

Use this endpoint when you need structured, source-linked evidence of webhook support before committing to an integration — especially when evaluating third-party APIs from their public docs. Prefer this over generic web scraping when you need webhook-specific signals (event types, payloads, auth) tied back to documentation sources, and when you want readiness evidence scoped to a particular event use case or receiver stack.

## Known failure modes

- Docs URL is inaccessible or behind authentication — returns an error or empty evidence
- Documentation does not mention webhooks — returns low-readiness or no-evidence result
- Event use case is too vague or ambiguous — evidence may be incomplete or mismatched
- Docs page is very large or dynamic — bounded parsing may miss some sections
- Incorrect URI format for docsUrl — returns validation error

## How this service works

Create source-linked webhook integration-readiness evidence from bounded public documentation.

## Output

A structured JSON object containing source-linked webhook integration-readiness evidence derived from the specified public documentation, including signals about supported events, payload formats, authentication mechanisms, and any gaps or caveats relevant to the given event use case and optional receiver stack.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "docsUrl",
      "eventUseCase"
     ],
     "properties": {
      "docsUrl": {
       "type": "string",
       "format": "uri"
      },
      "eventUseCase": {
       "type": "string"
      },
      "receiverStack": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitesignal-webhook-readiness-802f3f2b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phases-prot-shine-royal.trycloudflare.com](https://www.zero.xyz/host/phases-prot-shine-royal.trycloudflare.com/llms.txt)