> ## Documentation Index > Fetch the complete documentation index at: https://iotools.cloud/docs/llms.txt > Use this file to discover all available pages before exploring further. # Webhook Test Payload Generator > Generate realistic sample webhook payloads for GitHub, Stripe, Shopify, Slack, Twilio and SendGrid — complete with provider-correct headers, HMAC signatures and a ready-to-run cURL command. [Try Webhook Test Payload Generator in your browser →](https://iotools.cloud/tool/webhook-test-payload-generator/) ## OpenAPI ````yaml https://api.iotools.cloud/v1/openapi post /v1/tool/webhook-test-payload-generator openapi: 3.1.0 info: title: iotools.cloud API version: 1.0.0 description: >- Run any iotools.cloud tool over HTTP. Authenticate with `Authorization: Bearer iot_live_…`. **Only `POST /v1/tool/{slug}` costs credits.** Every GET here — the catalog, a tool's schema, your balance — is free. A tool call is charged its own weight or your plan's per-call minimum, whichever is larger; `x-iotools-credit-cost` on each operation is quoted at the free-tier minimum, and `GET /v1/tools/list` returns the exact figure for your key. `GET /v1/me/credits` reports what you have left, and `GET /v1/me/usage` reports what it went on. Failures are RFC 9457 problem documents — branch on `code`. servers: - url: https://api.iotools.cloud description: Production security: - bearerAuth: [] tags: - name: Catalog description: Find a tool and read its contract. Free. - name: Converters description: >- Convert between formats, encodings, and units — Base64, CSV and JSON, timestamps, and more. Fast, free, and processed right in your browser. - name: Formatters description: >- Format, beautify, minify, and validate code and data — JSON, HTML, CSS, SQL, and regex. Clean up messy input in one click, with nothing to upload. - name: Generators description: >- Generate exactly what you need and on demand — passwords, UUIDs, QR codes, hashes, random numbers, and more. Secure, instant, and free. - name: Calculators description: >- Crunch the numbers fast — from everyday math to specialized conversions and unit work. Free online calculators that run entirely in your browser. - name: Editors description: >- Edit and transform text, code, and images with quick, focused editors that run entirely in your browser — nothing to install, and no sign-up needed. - name: Utilities description: >- Everyday developer and web utilities — DNS and IP lookups, redirect and certificate checkers, and other quick diagnostics. Free and privacy-friendly. - name: Account description: Your key's allowance, limits and usage history. paths: /v1/tool/webhook-test-payload-generator: post: tags: - Generators summary: Webhook Test Payload Generator description: >- Generate realistic sample webhook payloads for GitHub, Stripe, Shopify, Slack, Twilio and SendGrid — complete with provider-correct headers, HMAC signatures and a ready-to-run cURL command. [Try Webhook Test Payload Generator in your browser →](https://iotools.cloud/tool/webhook-test-payload-generator/) operationId: run_webhook_test_payload_generator requestBody: required: false content: application/json: schema: type: object properties: ioPlatform: enum: - github - stripe - shopify - slack - twilio - sendgrid description: Platform ioGithubEvent: enum: - push - pull_request - issues - star - release description: Event Type ioStripeEvent: enum: - payment_intent.succeeded - charge.refunded - invoice.payment_failed - customer.subscription.created - checkout.session.completed description: Event Type ioShopifyEvent: enum: - orders/create - orders/paid - orders/cancelled - products/create - customers/create description: Event Type ioSlackEvent: enum: - message - app_mention - reaction_added - team_join - url_verification description: Event Type ioTwilioEvent: enum: - sms.inbound - sms.status - voice.inbound - voice.status description: Event Type ioSendgridEvent: enum: - delivered - bounce - open - click - spamreport description: Event Type ioSecret: type: string description: Webhook Secret ioTargetUrl: type: string description: Target URL required: [] responses: '200': description: Tool output content: application/json: schema: type: object required: - tool - tool_version - outputs - credits_used properties: request_id: type: string tool: type: string tool_version: type: string description: >- Output-contract version for this tool. Currently "1" for all tools. outputs: type: object properties: ioPayloadOutput: type: string description: Payload ioHeadersOutput: type: string description: Headers ioCurlOutput: type: string description: cURL Command credits_used: type: integer description: >- Credits this call consumed, after any settlement refund. 0 when metering is disabled. credits_remaining: type: - integer - 'null' description: >- Credits left in the current monthly allowance, or null when metering is disabled. '400': description: Invalid request. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/validation_error title: Invalid request status: 400 code: validation_error detail: One or more inputs are invalid — see `fields`. request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 '401': description: Missing or invalid API key. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/invalid_api_key title: Invalid API key status: 401 code: invalid_api_key detail: 'Provide ''Authorization: Bearer ''.' request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 '402': description: Monthly credit allowance exhausted. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/insufficient_credits title: Insufficient credits status: 402 code: insufficient_credits detail: >- This call costs 1 credit and 0 remain in this month's allowance. request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 '403': description: Tool exists but has no API surface. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/tool_not_allowed title: Tool not available over the API status: 403 code: tool_not_allowed detail: >- "Background Remover" is available on iotools.cloud but has no API endpoint. request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 '404': description: No such tool. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/tool_not_found title: Tool not found status: 404 code: tool_not_found detail: No tool with that slug. See GET /v1/tools. request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 '413': description: Body too large. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/payload_too_large title: Payload too large status: 413 code: payload_too_large detail: Request body exceeds this tool's size limit. request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 '429': description: Per-minute rate limit exceeded. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/rate_limited title: Rate limit exceeded status: 429 code: rate_limited detail: Too many requests. Retry in 30s. request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 '500': description: Tool failed to run. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/processing_error title: Tool failed to run status: 500 code: processing_error detail: The tool failed to run. Please try again. request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 '503': description: Tool temporarily disabled. content: application/problem+json: schema: $ref: '#/components/schemas/Problem' example: type: https://iotools.cloud/docs/errors/tool_disabled title: Tool temporarily disabled status: 503 code: tool_disabled detail: This tool is temporarily unavailable. Try again shortly. request_id: e4042b29-8f1e-4c7a-9b52-6f0d1a3c7e11 security: - bearerAuth: [] components: schemas: Problem: type: object description: >- RFC 9457 problem document, served as application/problem+json. Branch on `code`; `title` is human prose and may be reworded without notice. required: - type - title - status - code properties: type: type: string format: uri description: Stable documentation URI for this failure. examples: - https://iotools.cloud/docs/errors/invalid_api_key - https://iotools.cloud/docs/errors/api_unconfigured - https://iotools.cloud/docs/errors/validation_error - https://iotools.cloud/docs/errors/payload_too_large - https://iotools.cloud/docs/errors/tool_not_found - https://iotools.cloud/docs/errors/tool_not_allowed - https://iotools.cloud/docs/errors/tool_disabled - https://iotools.cloud/docs/errors/rate_limited - https://iotools.cloud/docs/errors/insufficient_credits - https://iotools.cloud/docs/errors/processing_error - https://iotools.cloud/docs/errors/internal_error title: type: string examples: - Invalid API key - API not configured - Invalid request - Payload too large - Tool not found - Tool not available over the API - Tool temporarily disabled - Rate limit exceeded - Insufficient credits - Tool failed to run - Internal error status: type: integer code: type: string enum: - invalid_api_key - api_unconfigured - validation_error - payload_too_large - tool_not_found - tool_not_allowed - tool_disabled - rate_limited - insufficient_credits - processing_error - internal_error detail: type: string description: Human explanation of this occurrence. request_id: type: string description: Correlation id, also sent as x-request-id. securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: iot_live_… ````