Blog
Postman: CORS in the desktop vs web client, pre-request scripts, and collection variables for OAuth tokens
Postman’s native app does not enforce browser CORS—only document results that match real user agents.
1 min read
postmanapi-testingcors
Monitors and runners
Scheduled monitors hit APIs from Postman cloud IPs—treat them as server-to-server, not browser CORS.
Collection runs in CI should assert CORS headers on the same paths browsers call.
Environments
Switching environments between dev and prod can leave stale Allow-Origin expectations in assertions.
Sync secrets to team workspaces carefully—leaked tokens can bypass CORS in malicious scripts.