Keep cardholder data out of your integration path
The cheapest PCI DSS compliance is the kind you don't have to do. If cardholder data never touches your systems, your scope shrinks dramatically, and so does your audit.
Scope reduction first
- Prefer hosted fields and tokenization so that PANs never transit client servers.
- If you must handle card data, isolate it: dedicated services, dedicated credentials, no logging.
- Document your data flows. Auditors ask for diagrams, not intentions.
Credential handling
- Secrets must be encrypted at rest (AES-256-GCM or better) and rotated on a schedule.
- Never log secrets, tokens, or headers that carry them. Redact before persistence: automatically, not by convention.
- IP whitelisting for admin and payout endpoints; mutual TLS where the regulator expects it.
Logging requirements you actually need
PCI DSS wants an audit trail. For integrations that means:
- Every API call logged with who, what, when, and correlation id
- Logs retained and tamper-evident
- Access to logs itself logged
A per-request traceId that follows a call from client request through webhook to resolution satisfies most of this with one design decision.
Rate limiting and availability
Rate limits are not just stability hygiene; they are a documented control for abuse. Publish yours, enforce them consistently, and return standards-compliant 429s with Retry-After so clients can back off correctly.
Where IntegrateMeFast helps
- Automatic redaction of sensitive fields in all stored request/response logs
- AES-256-GCM encryption for sandbox credentials
- Security review generated from your OpenAPI spec: which endpoints need whitelist, which need rate limits, which touch cardholder data
- PCI DSS consultation with checklists mapped to your integration flow