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CORS Check
x402
CORS Check is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Sends a real HTTP request and OPTIONS preflight to a URL and reports CORS policy headers, origin allowance, wildcard use, and credential risks.
Price / call$0.01
Success—
StatusUnknown
How this service works
CORS check for a URL: sends a request with an Origin (and a preflight OPTIONS) and reports Access-Control-Allow-Origin/Methods/Headers/Credentials, whether the origin is allowed, wildcard use, and the risky combination of wildcard with credentials. Integration and security testing. $0.01 per check.
Output
Returns the CORS-related response headers (Access-Control-Allow-Origin, Access-Control-Allow-Methods, Access-Control-Allow-Headers, Access-Control-Allow-Credentials), a boolean indicating whether the origin is allowed, whether a wildcard is in use, and a flag for the dangerous wildcard-plus-credentials combination.
Example use cases
Pre-deployment CORS validation
“Before I ship this frontend app, can you check if https://api.myservice.com/v1/users has CORS properly set up to allow requests from https://app.myservice.com, including what methods and headers are permitted?”
Security audit for wildcard credentials risk
“I've heard that some APIs have a dangerous CORS misconfiguration where they use a wildcard origin together with credentials — can you check https://thirdparty-api.io/endpoint for that exact risk?”
Debugging cross-origin request failures
“My browser is blocking requests to https://payments.partnersite.com/checkout from my app — can you do a CORS check and show me the Access-Control-Allow-Origin and Access-Control-Allow-Methods headers it returns?”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/site/corsWhen to prefer
Use this endpoint when you need to programmatically verify CORS policy on any HTTP endpoint — especially during integration testing, pre-deployment checks, or security audits. It is purpose-built for CORS inspection with both a real GET and an OPTIONS preflight, and explicitly flags dangerous misconfigurations like wildcard origins combined with credentials, making it more useful than manually inspecting browser DevTools or generic HTTP inspection tools.
Side effects
- Target URL is unreachable or times out — no CORS data returned
- Target URL returns no CORS headers — reported as CORS not configured
- Invalid URL format — request rejected before sending
- Target server blocks automated requests — may return 403 or no CORS headers
- Preflight OPTIONS request rejected by server — partial results only
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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