How to resolve "Sorry! Access denied" (HTTP 403) error when calling Coupang OpenAPI?
Common Causes:
IP Marked as High-Risk: Your server IP may have been flagged as malicious or high-risk by Coupang's security firewall. In this case, unblocking is difficult.
Request Rate Limiting (Blocking): If your IP generates too many error requests (e.g., invalid keys or parameters) within a short period, the security service will temporarily block access.
Recommended Solutions:
Immediate Action: Once the error is detected, stop all requests for about 10 minutes. Coupang typically lifts the restriction automatically if no further error requests are detected during this window.
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Prevention & Automation: We recommend implementing a "Circuit Breaker" mechanism in your code:
If the system detects a high error rate (e.g., more than 20 errors within 5 seconds), it should immediately halt all requests from that IP for at least 10 minutes.
Environment Change: If the issue persists after waiting, consider switching to a different outgoing IP address.