Economics and operations guides
GTM data quality guides
How credits, validation outcomes, and list QA connect to outbound results — sourced from the GTMAPIs billing and credit policy.
Cost per usable lead
A source-backed way to think about email validation cost based on usable outbound outcomes, not raw lookup counts.
Cost per recovered catch-all
A guide to evaluating Premium Catch-All Recovery by recovered, send-worthy outcomes rather than default catch-all validation results.
Email validation credit policy
How GTMAPIs reserves, consumes, and refunds credits for public Email Validation workflows.
Shared credit wallet
How the GTMAPIs credit ledger supports product-backed API workflows through one account balance.
Pre-send QA checklist
A source-backed checklist for validating an outbound list, routing risky catch-alls into recovery, and reconciling credits before campaign launch.