--- title: FAQs on Domain Research Suite (DRS) Subscriptions description: Do you have tutorials I can use to get myself familiar with DRS? Yes, you can check the list of our DRS tutorials here. I need an easy way to compute how many DRS credits I will need to set up DRS Mon --- [Skip to content](https://knowledge.whoisxmlapi.com/faqs-on-drs-subscriptions#main-content) English Show submenu for translations ![Logo inline notagline (1)-1.png\]](https://knowledge.whoisxmlapi.com/hs-fs/hubfs/Logo%20inline%20notagline%20(1)-1.png?height=40&name=Logo%20inline%20notagline%20(1)-1.png) Open main navigation Close main navigation - English Show submenu for translations - Go to whoisxmlapi.com Go to whoisxmlapi.com What do you want to know? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://knowledge.whoisxmlapi.com/?hsLang=en) 2. [Domain Research Suite (DRS)](https://knowledge.whoisxmlapi.com/domain-research-suite-drs-1?hsLang=en) # FAQs on Domain Research Suite (DRS) Subscriptions **Do you have tutorials I can use to get myself familiar with DRS?** Yes, you can check the list of our DRS tutorials [here](https://knowledge.whoisxmlapi.com/do-you-have-any-tutorials-for-new-drs-users?hsLang=en). **I need an easy way to compute how many DRS credits I will need to set up DRS Monitors. Can you help?** Yes, you can use our [DRS credits calculator](https://drs.whoisxmlapi.com/drs-credits-calculator) to compute which DRS plan would be the most suitable based on the number of terms, domains, or registrants you are planning to monitor. **What if I need more DRS credits in the future?** You can purchase another DRS subscription to top up your DRS credits balance. Or you can cancel an existing subscription and purchase another one that offer more credits per month. **Will I be able to easily cancel a monthly or yearly DRS subscription if I don't need it anymore?** Yes, you will be able to manually cancel monthly or yearly subscriptions from your user area by clicking the *"Edit subscription"* link then on the *"Cancel subscription"* button next to the subscription you want to cancel. Note that your subscription will remain effective until the end of the current billing period. **What are the payment methods?** We currently accept credit cards, PayPal, major cryptocurrencies. For instructions on how to pay by Check, Wire transfer, or other options, please contact [service.desk@whoisxmlapi.com](mailto:service.desk@whoisxmlapi.com). **What if I purchase the wrong DRS subscription?** No worries. Please contact [service.desk@whoisxmlapi.com](mailto:service.desk@whoisxmlapi.com) so our team can help you fix this. **Can I use my DRS credits to make API calls?** Yes, your DRS credits are valid to do API calls for the following products: - [Reverse WHOIS API](https://reverse-whois.whoisxmlapi.com/api) - [WHOIS History API](https://whois-history.whoisxmlapi.com/api) - [Screenshot API](https://website-screenshot.whoisxmlapi.com/api) - [Subdomains Lookup API](https://subdomains.whoisxmlapi.com/api) - [Domains & Subdomains Discovery API](https://domains-subdomains-discovery.whoisxmlapi.com/api) - [Reverse IP/DNS API](https://dns-history.whoisxmlapi.com/) - [Reverse MX API](https://reverse-mx.whoisxmlapi.com/api) - [Reverse NS API](https://reverse-ns.whoisxmlapi.com/api) - [Reverse DNS API](https://reverse-dns.whoisxmlapi.com/api) - [Registrant Alert API](https://registrant-alert.whoisxmlapi.com/api) - [Brand Alert API](https://brand-alert.whoisxmlapi.com/api) Similarly any credits purchased on the pricing pages of the above products are valid to use within the [DRS Dashboard](https://tools.whoisxmlapi.com/reverse-whois-search).  **I have other questions about paid API subscriptions** Please contact [service.desk@whoisxmlapi.com](mailto:service.desk@whoisxmlapi.com) and we'll get back to you asap. - [NRD2](https://knowledge.whoisxmlapi.com/nrd2?hsLang=en#main-content) - [Tutorials](https://knowledge.whoisxmlapi.com/nrd2?hsLang=en#tutorials) - [General Support](https://knowledge.whoisxmlapi.com/general-support?hsLang=en) - [WHOIS Domain Data](https://knowledge.whoisxmlapi.com/whois-domain-data?hsLang=en#main-content) - [WHOIS vs. Historical WHOIS](https://knowledge.whoisxmlapi.com/whois-domain-data?hsLang=en#whois-vs-historical-whois) - [Quarterly feeds](https://knowledge.whoisxmlapi.com/whois-domain-data?hsLang=en#quarterly-feeds) - [WHOIS data fields](https://knowledge.whoisxmlapi.com/whois-domain-data?hsLang=en#whois-data-fields) - [Bulk WHOIS Lookup](https://knowledge.whoisxmlapi.com/whois-domain-data?hsLang=en#bulk-whois-lookup) - [DNS Data](https://knowledge.whoisxmlapi.com/dns-data?hsLang=en) - [APIs](https://knowledge.whoisxmlapi.com/apis?hsLang=en#main-content) - [WHOIS API](https://knowledge.whoisxmlapi.com/apis?hsLang=en#whois-api) - [WHOIS History API](https://knowledge.whoisxmlapi.com/apis?hsLang=en#whois-history-api) - [DNS Lookup API](https://knowledge.whoisxmlapi.com/apis?hsLang=en#dns-lookup-api) - [IP Geolocation API](https://knowledge.whoisxmlapi.com/apis?hsLang=en#ip-geolocation-api) - [Email Verification API](https://knowledge.whoisxmlapi.com/apis?hsLang=en#email-verification-api) - [Domain Reputation API](https://knowledge.whoisxmlapi.com/apis?hsLang=en#domain-reputation-api) - [Subdomain Lookup API](https://knowledge.whoisxmlapi.com/apis?hsLang=en#subdomain-lookup-api) - [Reverse WHOIS API](https://knowledge.whoisxmlapi.com/apis?hsLang=en#reverse-whois-api) - [Databases / Data Feeds](https://knowledge.whoisxmlapi.com/databases-data-feeds?hsLang=en#main-content) - [Threat Intelligence Data Feeds (TIDF)](https://knowledge.whoisxmlapi.com/databases-data-feeds?hsLang=en#threat-intelligence-data-feeds-tidf) - [IP Geolocation / IP Netblocks Databases](https://knowledge.whoisxmlapi.com/databases-data-feeds?hsLang=en#ip-geolocation-ip-netblocks-databases) - [Legacy](https://knowledge.whoisxmlapi.com/legacy?hsLang=en) - [Dev & Data Science Corner](https://knowledge.whoisxmlapi.com/dev-data-science-corner?hsLang=en#main-content) - [Dev resources](https://knowledge.whoisxmlapi.com/dev-data-science-corner?hsLang=en#dev-resources) - [Domain Research Suite (DRS)](https://knowledge.whoisxmlapi.com/domain-research-suite-drs-1?hsLang=en) - [IP Data](https://knowledge.whoisxmlapi.com/ip-data?hsLang=en) [![Chill listening crop-3](https://knowledge.whoisxmlapi.com/hs-fs/hubfs/Logo%20eye%20icon%20(1).png?width=37&height=24&name=Logo%20eye%20icon%20(1).png "Chill listening crop-3")](http://whoisxmlapi.com) Copyright © 2026, whoisxmlapi.com