Added lithic-processing-time-ms Header

Overview

Every API response from Lithic's gateway now includes an lithic-processing-time-ms header. It reports how long our gateway spent processing your request, so you can isolate our processing time from network and infrastructure latency when investigating performance.

Details

The lithic-processing-time-ms header reports the time, in milliseconds, that Lithic's gateway spent processing a request, from the moment it reached our gateway to the moment the response was ready to send. It excludes network transit time and time spent in front-door infrastructure, such as our load balancer, between you and our gateway, so the value will always be lower than the total round-trip latency you observe.

Example response

HTTP/2 200
date: Mon, 21 Sep 2026 19:03:10 GMT
content-type: application/json
content-length: 16
x-lithic-processing-time-ms: 5
x-correlation-id: 4216f86e-9c3e-4c9a-8332-3c119d564caa
traceparent: 00-fe243c2575e95217ba012967e7299d3a-17f1edd283dcd5bf-01

{"message":"OK"}

Release Timeline

Production availability: Available now

User Impact

This change is additive only. Existing integrations will continue to function without modification.