FastHook
FastHook is a webhook infrastructure and event delivery platform built for developers and product teams that need a reliable way to receive, inspect, transform, route, and deliver webhook traffic. It acts as a programmable layer between incoming event sources and downstream destinations, making it easier to debug integrations, monitor event flow, and control how webhook data moves through a system.
The product lets teams create sources, destinations, and connections so they can ingest webhook requests, inspect payloads and metadata, apply routing or transformation logic, and forward events to the right services. It includes tooling for viewing requests and events, managing retries, tracking delivery outcomes, and understanding failures when integrations break. FastHook is designed to reduce the operational pain of webhook-based systems by giving teams better observability, replayability, and control over event processing.
It can be used for a variety of integration and automation
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Fiddler
Capture all HTTP(S) traffic between your computer and the Internet with Telerik Fiddler HTTP(S) proxy. Inspect traffic, set breakpoints, and fiddle with requests & responses. Fiddler Everywhere is a web debugging proxy for macOS, Windows, and Linux. Capture, inspect, monitor all HTTP(S) traffic between your computer and the Internet, mock requests, and diagnose network issues. Fiddler Everywhere can be used for any browser, application, process. Debug traffic from macOS, Windows, or Linux systems and iOS or Android mobile devices. Ensure the proper cookies, headers, and cache directives are transferred between the client and server. Supports any framework, including .NET, Java, Ruby, etc. Mock or modify requests and responses on any website. It’s a quick and easy way to change the request and responses to test websites without changing code. Use Fiddler Everywhere to log all HTTP/S traffic between your computer and the Internet.
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Webhook Relay
Webhook Relay is a secure tunneling and webhook forwarding platform that lets teams receive webhooks from any source on localhost, on-premise systems, private networks, laptops, Kubernetes clusters, and internal services without exposing private IPs or opening inbound firewall ports. Its main services include Webhook Forwarding, which is secure and unidirectional by default with optional request and response transformation, and Bidirectional Tunneling, which provides fast tunnels for direct access to any HTTP service, internal API, website, backend app, frontend app, or AI model. Users can create public Webhook Relay endpoints, specify one or more internal destinations, run the relay agent through CLI or Docker, and securely tunnel incoming webhooks to private targets. It supports real-time payload and response inspection, request forwarding to multiple destinations, static outgoing IPs for allowlisting, custom subdomains, non-expiring tunnel domains, encrypted tunnels, etc.
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Webhook.site
Webhook.site is a tool for testing, transforming, and automating web requests, webhooks, and emails through unique URLs and email addresses that show everything sent to them instantly. With Webhook.site, users receive a unique, random URL that can be used to test and debug webhooks and HTTP requests, inspect payloads, headers, query strings, and request details in real time, and replay items later when troubleshooting or reprocessing failed flows. It helps remove the frustration of building software and automations that communicate through webhook or email by making requests visible, persistent, and easier to understand. Webhook.site also supports Custom Actions, a graphical workflow editor that runs when a URL receives a request or email, allowing users to connect incompatible APIs, convert an HTTP request to an email or vice versa, transform, validate, and process requests, and build workflows that would otherwise require development work.
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