curl --request POST \ --url https://api.signuprisk.com/v1/analyze-email \ --header 'Authorization: Bearer <token>' \ --header 'Content-Type: application/json' \ --data ' { "email": "person@example.com" } '

{ "email": { "input": "person@example.com", "normalized": "person@example.com", "normalized_preserving_case": "person@example.com", "canonical": "person@example.com", "is_well_formed": true, "format_issues": [], "format_explanation": "The email address is structurally well formed. This does not mean it is safe, trusted, deliverable, or non-disposable.", "is_internationalized": false }, "decision": { "action": "block", "risk_score": 100, "risk_band": "very_high", "summary": "Very high-risk signup. Primary concern: IANA-reserved special-use domain that can never receive email.", "assessment": { "confidence": "medium", "evidence_strength": "strong", "evidence_coverage": "broad", "uncertainty": "low", "limitations": [] } }, "metadata": { "warnings": [], "usage": { "requests": { "used": 1, "limit": 10000, "unlimited": false, "remaining": 9999 }, "explanations": { "used": 0, "limit": 500, "unlimited": false, "remaining": 500 } }, "plan": { "current_plan": "Developer", "billing_period": { "starts": "2026-09-16T00:00:00Z", "ends": "2026-10-16T00:00:00Z" }, "reset_at": "2026-10-16T00:00:00Z" }, "assessment_version": "2026.08.28" } }