An OOB interaction gathering server and client library

Interactsh is an Open-Source Solution for Out of band Data Extraction, A tool designed to detect bugs that cause external interactions, For example – Blind SQLi, Blind CMDi, SSRF, etc.


  • DNS/HTTP/HTTPS/SMTP Interaction support
  • NTLM/SMB Listener support (self-hosted)
  • Wildcard Interaction support (self-hosted)
  • CLI / Web / Burp / ZAP / Docker client support
  • AES encryption with zero logging
  • SELF Hosted Interactsh server support
  • Automatic ACME based Wildcard TLS w/ Auto Renewal
  • DNS Entries for Cloud Metadata service

Interactsh Client

Interactsh CLI Client

Interactsh Cli client requires go1.17+ to install successfully. Run the following command to get the repo –

go install -v[email protected]

Running Interactsh CLI Client

This will generate a unique payload that can be used for OOB testing with minimal interaction information in the ouput.


    _       __                       __       __  
   (_)___  / /____  _________ ______/ /______/ /_ 
  / / __ \/ __/ _ \/ ___/ __ '/ ___/ __/ ___/ __ \
 / / / / / /_/  __/ /  / /_/ / /__/ /_(__  ) / / /
/_/_/ /_/\__/\___/_/   \__,_/\___/\__/____/_/ /_/ v0.0.5

[INF] Listing 1 payload for OOB Testing

[c23b2la0kl1krjcrdj10cndmnioyyyyyn] Received DNS interaction (A) from at 2021-26-26 12:26
[c23b2la0kl1krjcrdj10cndmnioyyyyyn] Received DNS interaction (AAAA) from at 2021-26-26 12:26
[c23b2la0kl1krjcrdj10cndmnioyyyyyn] Received HTTP interaction from at 2021-26-26 12:26
[c23b2la0kl1krjcrdj10cndmnioyyyyyn] Received DNS interaction (MX) from at 2021-26-26 12:26
[c23b2la0kl1krjcrdj10cndmnioyyyyyn] Received DNS interaction (TXT) from at 2021-26-26 12:26
[c23b2la0kl1krjcrdj10cndmnioyyyyyn] Received SMTP interaction from at 2021-26-26 12:26

Running the Interactsh client in verbose mode (v) to see the whole request and response, along with an output file to analyze afterwards.

interactsh-client -v -o interactsh-logs.txt

    _       __                       __       __  
   (_)___  / /____  _________ ______/ /______/ /_ 
  / / __ \/ __/ _ \/ ___/ __ '/ ___/ __/ ___/ __ \
 / / / / / /_/  __/ /  / /_/ / /__/ /_(__  ) / / /
/_/_/ /_/\__/\___/_/   \__,_/\___/\__/____/_/ /_/ v0.0.5

[INF] Listing 1 payload for OOB Testing

[c58bduhe008dovpvhvugcfemp9yyyyyyn] Received HTTP interaction from at 2021-09-26 18:08:07
HTTP Request

GET /favicon.ico HTTP/2.0
Accept: image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: en-IN,en;q=0.9
Cookie: _ga=GA1.2.440163205.1619796009; _iub_cs-77854424=%7B%22timestamp%22%3A%222021-04-30T15%3A23%3A23.192Z%22%2C%22version%22%3A%221.30.2%22%2C%22consent%22%3Atrue%2C%22id%22%3A77854424%7D
Sec-Ch-Ua: "Google Chrome";v="93", " Not;A Brand";v="99", "Chromium";v="93"
Sec-Ch-Ua-Mobile: ?0
Sec-Ch-Ua-Platform: "macOS"
Sec-Fetch-Dest: image
Sec-Fetch-Mode: no-cors
Sec-Fetch-Site: same-origin
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Safari/537.36

HTTP Response

HTTP/1.1 200 OK
Connection: close
Content-Type: text/html; charset=utf-8


Using the server flag, Interactsh client can be configured to connect with a self-hosted interactsh server.

interactsh-client -server

Using the token flag, Interactsh client can connect to a self-hosted interactsh server that is protected with authentication.

interactsh-client -server -token XXX

If you are away from your terminal, you may use notify to send a real-time interaction notification to any supported platform.

interactsh-client | notify



interactsh-client -h

This will display help for the tool. Here are all the switches it supports.

Flag Description Example
n Interactsh payload count to generate (default 1) interactsh-client -n 2
poll-interval Interaction poll interval in seconds (default 5) interactsh-client -poll-interval 1
server Interactsh server to use interactsh-client -server
dns-only Display only DNS interaction in CLI output interactsh-client -dns-only
http-only Display only HTTP interaction in CLI output interactsh-client -http-only
smtp-only Display only SMTP interaction in CLI output interactsh-client -smtp-only
json Write output in JSONL(ines) format interactsh-client -json
token Authentication token to connect interactsh server interactsh-client -token XXX
persist Enables persistent interactsh sessions interactsh-client -persist
o Output file to write interaction interactsh-client -o logs.txt
v Show verbose interaction interactsh-client -v

Interactsh Web Client

Interactsh-web is a free and open-source web client that displays Interactsh interactions in a well-managed dashboard in your browser. It uses the browser’s local storage to store and display all incoming interactions. By default, the web client is configured to use –, a cloud-hosted interactsh server, and supports other self-hosted public/authencaited interactsh servers as well.

A hosted instance of interactsh-web client is available at


Interactsh Docker Client

A Docker image is also provided with interactsh client that is ready to run and can be used in the following way:

docker run projectdiscovery/interactsh-client:latest

docker run projectdiscovery/interactsh-client:latest

    _       __                       __       __  
   (_)___  / /____  _________ ______/ /______/ /_ 
  / / __ \/ __/ _ \/ ___/ __ '/ ___/ __/ ___/ __ \
 / / / / / /_/  __/ /  / /_/ / /__/ /_(__  ) / / /
/_/_/ /_/\__/\___/_/   \__,_/\___/\__/____/_/ /_/ v0.0.5

[INF] Listing 1 payload for OOB Testing

Burp Suite Extension

interactsh-collaborator is Burp Suite extension developed and maintained by @wdahlenb

  • Download latest JAR file from releases page.
  • Open Burp Suite → Extender → Add → Java → Select JAR file → Next
  • New tab named Interactsh will be appeared upon successful installation.
  • See the interactsh-collaborator project for more info.



Interactsh can be used with OWASP ZAP via the OAST add-on for ZAP. With ZAP’s scripting capabilities, you can create powerful out-of-band scan rules that leverage Interactsh’s features. A standalone script template has been provided as an example (it is added automatically when you install the add-on).

  • Install the OAST add-on from the ZAP Marketplace.
  • Go to Tools → Options → OAST and select Interactsh.
  • Configure the options for the client and click on “New Payload” to generate a new payload.
  • OOB interactions will appear in the OAST Tab and you can click on any of them to view the full request and response.
  • See the OAST add-on documentation for more info.


Interactsh Server

Interactsh server runs multiple services and captures all the incoming requests. To host an instance of interactsh-server, you are required to have the follow requirements:

  1. Domain name with custom host names and nameservers.
  2. Basic VPS running 24/7 in the background.

We are using GoDaddy for domain name and DigitalOcean droplet for the server, a basic $5 droplet should be sufficient to run self-hosted Interactsh server. If you are not using GoDaddy, follow your registrar’s process for creating / updating DNS entries.

Configuring Interactsh domain

  • Navigate to{{domain}}/dns
  • Advanced Features → Host names → Add → Submit ns1, ns2 with VPS IP as value


  • Navigate to{{domain}}/nameservers
  • I’ll use my own nameservers → Submit ns1.{{domain}}, ns2.{{domain}}


Configuring Interactsh server

Install interactsh-server on your remote VPS

go install -v[email protected]

Considering domain name setup is completed, run the below command to run interactsh server

interactsh-server -domain

Alternatively, you can utilize ready to run docker image of interactsh-server on your remote machine with

docker run projectdiscovery/interactsh-server:latest -domain

Following is an example of a successful installation and operation of a self-hosted server:


A number of needed flags are configured automatically to run interactsh server with default settings. For example, the hostmaster flag with a valid email address such as [email protected] and the ip and listen-ip flags with the public IP address of the VPS.

A hosted instance of interactsh-server which is used as default with interactsh-client is available at


interactsh-server -h

This will display help for the tool. Here are all the switches it supports.

Flag Description Example
auth Enable authentication to server using random generated token interactsh-server -auth
token Enable authentication to server using given token interactsh-server -token MY_TOKEN
domain Domain to use for interactsh server interactsh-server -domain
eviction Number of days to persist interactions for (default 30) interactsh-server -eviction 30
hostmaster Hostmaster email to use for interactsh server interactsh-server -hostmaster [email protected]
ip Public IP Address to use for interactsh server interactsh-server -ip XX.XX.XX.XX
listen-ip Public IP Address to listen on interactsh-server -listen-ip XX.XX.XX.XX
root-tld Enable wildcard/global interaction for * interactsh-server -root-tld
origin-url Origin URL to send in ACAO Header interactsh-server -origin-url
responder Start a responder agent – docker must be installed interactsh-server -responder
smb Start a smb agent – impacket and python 3 must be installed interactsh-server -smb
debug Run interactsh in debug mode interactsh-server -debug

There are more useful capabilities supported by Interactsh server that are not enabled by default and are intended to be used only by self-hosted servers. These feature are not available with hosted server at

root-tld flag enables wildcard (* interaction support with your self-hosted server and includes implicit authentication protection via the auth flag if the token flag is omitted.

interactsh-server -domain -root-tld

2021/09/28 12:18:24 Client Token: 4c17895a460123ea439abbad64e0e02c2c7be660464d75299f76e1a972ac4e56
2021/09/28 12:18:24 TLS certificates are not expiring, continue!
2021/09/28 12:18:24 Listening on DNS, SMTP and HTTP ports

Interactsh Integration

Nuclei – OOB Scan

Nuclei vulnerability scanner can also utilize Interactsh for automated payload generation and detection of Out of band based security vulnerabilities.

See Nuclei + Interactsh Integration blog and guide document for more info.

Cloud Metadata

Interactsh server supports DNS records for cloud metadata services, which is useful for testing SSRF-related vulnerabilities.

Currently supported metadata services:


aws.{interactsh-server} points to points to

alibaba.{interactsh-server} points to points to


Interactsh is inspired from Burp Collaborator.


Interactsh is distributed under MIT License and made with 🖤 by the projectdiscovery team.


View Github