Interactsh
Interactsh is an open-source ProjectDiscovery tool that captures out-of-band DNS, HTTP and SMTP interactions, used to confirm blind vulnerabilities in authorised tests.
Legal & ethical use. Use this tool only on systems, networks and data that you own or have explicit written permission to test. Unauthorised access or scanning can break computer-misuse laws (for example Pakistan's Prevention of Electronic Crimes Act, 2016, and equivalents elsewhere). Practise in your own lab or in authorised environments such as CTFs.
What it is used for
- Confirm blind SSRF or injection in your own lab app
- Self-host an interaction server
Key features
- DNS/HTTP/SMTP capture
- Self-hostable
- CLI client
Installation
go install github.com/projectdiscovery/interactsh/cmd/interactsh-client@latest
Beginner usage guide
Use the client against a vulnerable practice app that you run yourself.
Example commands
Run these only against your own lab or authorised targets. Placeholder addresses such as 192.0.2.x are documentation ranges.
Start the client
interactsh-clientGenerates a unique interaction domain and prints interactions it receives.
References
Source verification
Last reviewed: 2026-10-27
Links checked over HTTP: 2026-10-27 07:51 UTC — official: 200, docs: 200, repo: 200
Commands were written from the official documentation and have not been executed on this site; test them in your lab.