Documentation
Everything you need to use Opsis programmatically. Search emails, usernames, and domains and get structured JSON back — the same engine that powers the web app, from any language.
API Reference
The full v1 reference — base URL, authentication, endpoints, result schema, error codes, and copy-paste curl examples.
Read the referenceAPI Keys
Create and manage the secret keys that authenticate your API requests. Available on the Pro and Unlimited plans.
Manage your keysSupport
Questions, integration help, or something not covered here? Reach the team directly and we’ll get back to you.
Email supportNew to the API? Start with the API Reference — it walks through authentication and your first request end to end.