Introducing Webhook Tester: A Free Tool to Inspect Webhooks in Real-Time

Test Webhooks Without the Ceremony

Setting up a webhook integration usually means deploying an endpoint, tailing logs, and hoping the payload looks like the docs say it will. Dedicated testing tools exist, but most require an account, limit you to 50 requests, or bury the useful features behind a paywall.

Today we are shipping Webhook Tester, a free tool built into Hookbase that gives you a unique webhook URL in one click. No signup, no email, no credit card. Send requests to it and inspect them in real-time.

How It Works

1. Visit hookbase.app/bin and click Create Webhook URL.
2. Copy the URL and point your webhook provider at it.
3. Requests appear instantly in a two-panel inspector — event list on the left, full detail on the right.

Each bin stays active for 48 hours and accepts up to 200 requests. That is enough to test an integration, debug a failing webhook, or prototype a new event handler.

What You Can Inspect

Every captured request shows the full picture:

• Headers — every request header, not just the filtered subset. Useful for debugging signature verification, tracing request IDs, and inspecting provider-specific headers.
• Body — auto-detected and formatted. JSON gets a collapsible tree viewer. XML is pretty-printed. Form-urlencoded data renders as a key-value table. Everything else shows as raw text.
• Query parameters — parsed and displayed in their own tab.
• Metadata — method, IP address, content type, size, SHA-256 hash, and precise timestamp.

All HTTP methods are accepted — GET, POST, PUT, PATCH, DELETE, and anything else your provider might send.

Custom Responses

Most webhook testing tools return a static 200 OK. That works until you need to test retry logic, error handling, or conditional behavior based on status codes.

Webhook Tester lets you configure what the bin returns:

• Status code — set it to 500 to test retries, 301 for redirects, or 422 to test validation error handling.
• Response headers — add custom headers like Content-Type, X-Request-Id, or anything your client expects.
• Response body — return a JSON object, an error message, or whatever your integration needs to parse.

Click the gear icon in the header to configure the response. Changes take effect immediately for the next request.

Code Generation in 9 Languages

Captured a request you want to replay? The Replay tab generates ready-to-run code from the captured request in:

• cURL — copy and paste into your terminal
• Node.js — using the Fetch API
• Python — using the requests library
• Go — using net/http
• C# — using HttpClient
• Java — using java.net.http
• Rust — using reqwest
• Ruby — using net/http
• PHP — using Guzzle and native stream_context

All snippets include the original headers and body, with infrastructure headers (like Cloudflare internals) automatically filtered out. Each snippet has syntax highlighting and a copy button.

Type Generation from Payloads

The Types tab takes any JSON payload and generates typed definitions in 10 languages:

• TypeScript — interfaces with ISO date, UUID, and URL annotations
• Zod — schemas with .datetime(), .url(), .uuid(), and .email() validators
• Python — dataclasses with type hints
• Go — structs with json tags
• C# — classes with JsonPropertyName attributes and proper .NET types (DateTime, Guid, Uri)
• Java — classes with Jackson @JsonProperty annotations and getters/setters
• Rust — structs with serde Serialize/Deserialize derives
• Ruby — classes with attr_accessor and initializers
• PHP — classes using constructor property promotion and readonly (PHP 8.5)
• JSON Schema — Draft 2020-12 with format annotations

The generator detects common string patterns — ISO dates become DateTime/Instant/DateTimeImmutable in the appropriate language, UUIDs become Guid/UUID, URLs become Uri/string /* URL */.

This is particularly useful when you are integrating a new webhook provider. Capture a real payload, generate the types, and paste them into your codebase.

Search, Filter, and Export

When you are testing at volume, finding the right request matters:

• Method filter — toggle by GET, POST, PUT, PATCH, DELETE to isolate specific request types.
• Search — search across body content, IP addresses, paths, and content types.
• Export — download all captured requests as JSON or HAR (HTTP Archive) format. HAR files can be imported into browser dev tools or shared with teammates.

Real-Time Streaming

Requests appear the instant they arrive via server-sent events. The connection auto-reconnects with exponential backoff, so you can leave the tab open while iterating on your integration.

When you click on a request, it stays selected — new incoming requests appear in the list without stealing focus.

What Comes Next

Webhook Tester is a free, standalone tool. If you find yourself needing routing, transforms, retries, signature verification, or localhost tunnels, those are all part of the core Hookbase platform with a free tier at 10,000 events per month.

Try it now at hookbase.app/bin.