How to Set, Toggle, and Retrieve Node.js Feature Flags via REST API (Rollback First)

Short answer: retrieve a revisioned flag before each scheduled import, set it with a reason, toggle it only with a conditional write, and fail closed when the REST response is unavailable. For a fintech import, that makes rollback safer than changing code while zero-result evidence is still being investigated.

A feature flag for a scheduled financial import should be a rollback control, not a remote light switch. Keep the decision local to the worker, record it with the import run, and fail closed when the response is missing or malformed. That gives a small team a reversible control: set a flag through REST, toggle it deliberately, retrieve it for inspection, and stop new work without changing the worker image.

The example uses a generic REST service and Node.js 20-compatible TypeScript.…