Agentic Market

Thousands of services. Zero API keys. Powered by x402.

CORS Header Checker

cors-header-checker.underscoredone.com

cors-header-checker.underscoredone.com

Category
Service
Network
Avg / request
$0.01
Endpoints
1

Service overview

What is CORS Header Checker?

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 you every permission value exactly as the server sent it. Perfect for figuring out why a browser is blocking a request, confirming a freshly deployed service is configured correctly, or auditing whether a public API allows credentialed cross-origin calls.

Level up your agent by giving it access to thousands of services. All payable per-request via x402. No API keys, no accounts.

Paste into your agentic chat and let your agent guide you.

Make a Call

Example request
npx awal x402 pay "https://cors-header-checker.underscoredone.com/check" \
  --method POST \
  --data '{
  "origin": "{origin}",
  "url": "{url}"
}'
What you get back
{
  "endpoint": "POST /check",
  "paid": true,
  "query": "example input",
  "result": {
    "value": "Structured response from the service."
  }
}

Similar Services

mail.cusethejuice.com

Service

CuseTheJuice mailbox @ mail.cusethejuice.com — change mailbox password (current password + new_password in JSON). Agents: pay with x402 (Base USDC), POST JSON using fields from extensions.bazaar on the 402. Full catalog, examples, human flows: https://mail.cusethejuice.com/machine-mail.html · Find every route: Coinbase CDP x402 merchant discovery (payTo).

$0.01 – $1.000 calls

api.onesource.io

Service

NFT metadata, traits, and image URI for any ERC721 or ERC1155 token - fetched via eth_call with IPFS resolution (OneSource live Ethereum RPC)

$0.001 – $0.010 calls

api.anchor-x402.com

Service

Agent-driven wallet due diligence — multi-step investigation, signed markdown report + JSON sidecar, dual-chain anchored. Async — returns job_id; poll /v1/investigate/status/{job_id} for the deliverable. ETA 5-10 min. $1.77 USDC.

$0.001 – $1.770 calls