Awesome Open Source
Awesome Open Source


WebHook Tester

Release version Project language Build Status Release Status Coverage Image size License

This application allows you to test and debug Webhooks and HTTP requests using unique (random) URLs. You can customize the response code, content-type HTTP header, response content and set some delay for the HTTP responses. The main idea is viewed here.


This application is written in GoLang and works very fast. It comes with a tiny UI (written in Vue.js), which you can customize however you want. Websockets are also used for incoming webhook notifications in UI - you don't need any 3rd party solutions (like for this!

🔥 Features list

  • Customizable front-end, based on vue.js (without the need for a builder/bundler)
  • Liveness/readiness probes (routes /live and /ready respectively)
  • Can be started without any 3rd party dependencies
  • Metrics in prometheus format (route /metrics)
  • Multi-arch docker image, based on scratch
  • Unprivileged user in docker image is used
  • Well-tested and documented source code
  • Built-in CLI health check sub-command
  • Recorded request binary view using UI
  • JSON/human-readable logging formats
  • Customizable webhook responses
  • Built-in Websockets support
  • Low memory/cpu usage
  • Free and open-source
  • Ready to scale


At the moment 2 types of data storage are supported - memory and redis server (flag --storage-driver).

The memory driver is useful for fast local debugging when recorded requests will not be needed after the app stops. The Redis driver, on the contrary, stores all the data on the redis server, and the data will not be lost after the app restarts. When running multiple app instances (behind the load balancer), it is also necessary to use the redis driver.


Publishing/subscribing are used to send notifications using WebSockets, and it also supports 2 types of driver - memory and redis server (flag --pubsub-driver).

For multiple app instances redis driver must be used.


Download the latest binary file for your os/arch from the releases page or use our docker image ( Also, you may need in ./web directory content for web UI access.


This application supports the next sub-commands:

Sub-command Description
serve Start HTTP server
healthcheck Health checker for the HTTP server (use case - docker healthcheck) (hidden in CLI help)
version Display application version

And global flags:

Flag Description
--verbose, -v Verbose output
--debug Debug output
--log-json Logs in JSON format

HTTP server starting

serve sub-command allows to use next flags:

Flag Description Default value Environment variable
--listen, -l IP address to listen on (all interfaces) LISTEN_ADDR
--port, -p TCP port number 8080 LISTEN_PORT
--public Path to the directory with public assets %app_bin%/web PUBLIC_DIR
--storage-driver Storage engine (memory or redis) memory STORAGE_DRIVER
--pubsub-driver Pub/Sub engine (memory or redis) memory PUBSUB_DRIVER
--redis-dsn Redis server DSN (required if storage or pub/sub driver is redis; format: redis://<user>:<password>@<host>:<port>/<db_number>) redis:// REDIS_DSN
--ignore-header-prefix Ignore incoming webhook header prefix (case insensitive; example: X-Forwarded-) []
--max-request-body-size Maximal webhook request body size (in bytes; 0 = unlimited) 65536
--max-requests Maximum stored requests per session (max 65535) 128 MAX_REQUESTS
--session-ttl Session lifetime (examples: 48h, 1h30m) 168h SESSION_TTL
--ws-max-clients Maximal websocket clients (0 = unlimited) 0 WS_MAX_CLIENTS
--ws-max-lifetime Maximal single websocket lifetime (examples: 3h, 1h30m; 0 = unlimited) 0 WS_MAX_LIFETIME

Environment variables have higher priority than flag values.

Server starting command example:

$ ./webhook-tester serve \
    --port 8080
    --public ./web
    --storage-driver redis
    --pubsub-driver redis
    --redis-dsn redis://redis-host:6379/0
    --max-requests 512
    --ignore-header-prefix X-Forwarded-
    --ignore-header-prefix X-Reverse-Proxy-
    --ws-max-clients 30000
    --ws-max-lifetime 6h

After that you can navigate your browser to try to send your first HTTP request for the webhook-tester!

Using docker

image stats

All supported image tags can be found here and here.

Just execute in your terminal:

$ docker run --rm -p 8080:8080/tcp tarampampam/webhook-tester:X.X.X serve

Important notice: do not use the latest application tag (this is bad practice). Use versioned tag (like 1.2.3) instead.

Where X.X.X is image tag (application version). Simple docker-compose file below:

version: '3.4'


    image: tarampampam/webhook-tester:X.X.X
    command: serve --port 8080 --log-json --storage-driver redis --pubsub-driver redis --redis-dsn redis://redis:6379/0
      - '8080:8080/tcp' # Open <>

    image: redis:6.0.9-alpine
      - redis-data:/data:cached
      - 6379


I can't guarantee that these links will be available forever, but you can use this application by the following links:

Changes log

Release date Commits since latest release

Changes log can be found here.


New versions publishing is very simple - just "publish" new release using repo releases page.

Release version (and git tag, of course) MUST starts with v prefix (eg.: v0.0.1 or v1.2.3-RC1)


Issues Issues

If you find any package errors, please, make an issue in current repository.


This is open-sourced software licensed under the MIT License.

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