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Webhook Tester API

Registre officiel Autres

Test webhook endpoints — send requests, measure latency, validate responses. x402 micropayment.

Code source Site web Documentation

Installation

Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).

Remote (sse)
Claude Code 
claude mcp add --transport sse webhook-tester-api 'https://webhook-tester.api.klymax402.com/mcp'
Configuration JSON (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "webhook-tester-api": {
            "type": "sse",
            "url": "https://webhook-tester.api.klymax402.com/mcp"
        }
    }
}

Documentation

Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.

Sommaire
  1. Webhook Tester API
  2. Quickstart -- MCP
  3. Quickstart -- HTTP (x402)
  4. Tools
  5. Example agent prompts
  6. Payment
  7. Part of klymax402
  8. License

Webhook Tester API

Test webhook endpoints -- send POST/PUT/PATCH/DELETE with custom headers and payloads. Measure latency and TLS. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "webhook-tester": {
      "url": "https://webhook-tester.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://webhook-tester.api.klymax402.com/api/test" \
  -H "Content-Type: application/json" \
  -d '{"url":"https://example.com"}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

ToolMethodPathPriceDescription
api_test_webhookPOST/api/test$0.005Send a test request to a webhook URL and analyze the response
api_test_webhook

Use this when you need to test a webhook endpoint by sending a request with custom headers, body, and method. Returns full response data in JSON.

Parameters

NameTypeRequiredDescription
urlstringyesWebhook URL to test (must be https)
methodstringnoHTTP method: POST, PUT, PATCH, DELETE (default: POST)
headersobjectnoCustom headers as key-value pairs
bodyobjectnoJSON body to send
timeoutnumbernoTimeout in seconds (default: 10, max: 30)

Example response:

{"url":"https://hooks.example.com/callback","method":"POST","statusCode":200,"responseBody":{"received":true},"latency":142,"tlsInfo":{"protocol":"TLSv1.3","cipher":"AES-256-GCM"},"requestSize":256,"responseSize":48}

When to use: testing webhook integrations, debugging API callbacks, validating endpoint availability, and measuring webhook response times.

Not for: web scraping (use web_scrape_to_markdown), screenshot capture (use capture_screenshot), HTTP header security audit (use network_analyze_headers).

Example agent prompts

  • "Test a webhook endpoint by sending a request with custom headers, body, and method"

Payment

  • Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
  • Network: Base L2 (eip155:8453)
  • Asset: USDC
  • Facilitator: Coinbase CDP (primary), PayAI (fallback)
  • Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

License

MIT

Questions fréquentes

Qu'est-ce que Webhook Tester API ?

Test webhook endpoints — send requests, measure latency, validate responses. x402 micropayment.

Comment installer Webhook Tester API ?

Il fonctionne comme serveur distant. Dans Claude Code : claude mcp add --transport sse webhook-tester-api 'https://webhook-tester.api.klymax402.com/mcp'. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.

Faut-il une clé API pour Webhook Tester API ?

Son entrée au registre n'indique aucune clé ni secret obligatoire. Certaines fonctions peuvent tout de même demander un compte auprès du service auquel il se connecte.

Webhook Tester API est-il open source ?

Oui. Son code est sur GitHub sous licence MIT.

Qui maintient Webhook Tester API ?

Il est publié par Br0ski777. AI.tn le référence sans le maintenir ni le recommander.

Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.