# Strale Webhook Test Payload Generator

> Strale Webhook Test Payload Generator is a paid API for AI agents from api.strale.io, paid per call via x402, $0.054001/call, status unknown (last checked 2026-09-15).

Generates realistic, schema-accurate test webhook payloads with proper headers for Stripe, GitHub, Slack, Twilio, SendGrid, and Shopify events

## Facts

- Endpoint: GET https://api.strale.io/x402/webhook-test-payload
- Price: $0.054001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-strale-io-c6483c6a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0IBnl-MQUBy4cjQSnwX4d

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 api-strale-io-c6483c6a
```

Example prompt: Can you generate a realistic test webhook payload for a Stripe payment_intent.succeeded event, including the proper headers I'd expect from Stripe?

## When to prefer this

Use this endpoint when you need to test webhook handlers locally or in CI/CD without waiting for real events from third-party services. Ideal when you need schema-accurate payloads with proper authentication headers (e.g. Stripe-Signature) rather than hand-crafted JSON. Prefer over manual payload crafting when accuracy to the provider's real schema matters.

## Known failure modes

- Unsupported service name returns an error — only stripe, github, slack, twilio, sendgrid, shopify are valid
- Unknown or misspelled event_type for a given service may return an error or a generic payload
- Missing required query parameters (service or event_type) returns a 400 bad request
- Network timeout or service unavailability returns a 5xx error

## How this service works

Generate realistic test webhook payloads for Stripe, GitHub, Slack, Twilio, SendGrid, Shopify. Includes proper headers and schema-accurate data.

## Output

Returns a schema-accurate JSON webhook payload matching the specified service and event type, along with realistic HTTP headers (e.g. Stripe-Signature, X-Hub-Signature for GitHub) that mirror what the real service would send. Data fields are populated with plausible values conforming to the provider's actual webhook schema.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "service",
      "event_type"
     ],
     "properties": {
      "service": {
       "type": "string",
       "description": "stripe/github/slack/twilio/sendgrid/shopify"
      },
      "event_type": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-strale-io-c6483c6a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)