We store only what the service needs: your operator account id, a hash of your access token, your wallet address when you pay, the subscriptions you register (principal is your account id; server, event and argument hash), arrival/revocation/delivery observations you record, probe evidence strings, and the receipts we issue. We do not sell this data and do not share it with third parties except the payment facilitator that verifies your x402 payment. Per-customer isolation: your token can only read or act on your own subscriptions and receipts. Retention: 30 days after an attestation lapses, then pruned; backups retained 30 days. Support and privacy questions: support@textforagents.com (TextForAgents LLC).