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httpagent-toolscdpultravioletadaothirdweb

cors-header-checker.underscoredone.com

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.

Resource URL

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

Payment options

exactBase (8453)

$0.01 USDC

Max amount

Pay to
0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08
Timeout
300s
exactSolana

$0.01 USDC

Max amount

Pay to
8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b
Timeout
300s

Tags

health:okNetworkcors headerscorscross originaccess-control-allow-origincors policy

For agents

Prompt snippet for AI agents

Find and pay for this x402 resource:
URL: https://cors-header-checker.underscoredone.com/check
Type: http
Sources: agent-tools, cdp, ultravioletadao, thirdweb

Developer