cors-header-checker.underscoredone.com

As advertised

Read from a directory and written down with its source and date. Not measured. provenance: recorded

url

https://cors-header-checker.underscoredone.com/check

hostname

cors-header-checker.underscoredone.com

operator

CORS Header Checker

capability

Sends a real request to any URL you provide, attaches an Origin header, and reads back all six standard cross-origin permission headers the server returns. Tells you whether cross-origin requests are enabled at all, whether your specific origin is permitted, and shows every permission value exactly as the server sent it. Useful for finding why a browser is blocking a request, confirming a new deployment is configured correctly, or auditing whether a public API allows credentialed calls.

capability tag

identity-risk

source directory

cdp-bazaar

Seen

first seen

4 September 2026 2026-09-04T11:24:51Z

last seen

4 September 2026 2026-09-04T11:24:51Z

current status

active

observations

1

observation cost, USD

$0.00

Price history

1 rows. 0 observed on a call Crosspeel made, 1 recorded from an advertised figure. The provenance column says which, on every row, and the two are never added together.

Cluster membership

This endpoint is not a member of any published cluster. That means either no match was found at the current threshold, or the observations behind a candidate match do not yet reach the depth the method requires. Neither is a statement about the endpoint. The thresholds are at /method.

Observations