API Reference
Interactive documentation with code examples in curl, Python, and JavaScript.
Sign in to auto-fill your API key.
Authentication:
API Key via X-API-Key header for data endpoints.
Billing endpoints (balance, ledger, usage, subscription, checkout) accept your API key or the dashboard session; account & key management uses the dashboard session (Bearer JWT).
Analysis
Jobs
/jobs/{id} Poll job status and retrieve scoring results
View docs → /jobs/{id}/signals Per-entity signal and scoring breakdown
View docs → /jobs/{id}/subdomains Enumerated subdomains discovered for the job
View docs → /jobs/{id}/certificate TLS certificate intelligence for the job
View docs →Domains
Entities
Correlation
Authentication
Webhooks
Additional Resources
Postman Collection
Import the core endpoints into Postman with pre-configured variables.
Changelog
Release notes, new features, and API changes.
Claude MCP Integration
Use WhoisGenius directly inside Claude. Supports analyze_domain and correlate_domains tools with Markdown summaries and structured output.
claude mcp add --transport http whoisgenius https://api.whoisgeni.us/mcp