# Border

> Border checks a cross-origin API call the way the browser does: it sends the real preflight to the live API (or reads pasted curl output for localhost), applies the Fetch standard CORS rules as Chrome implements them, and returns the verdict, Chrome's exact error message, the failing step and the exact response headers that fix it. No account.

- **Domain**: `border.clawhard.com`
- **Provider**: Clawhard Studio (https://clawhard.com)
- **A2A protocol version**: 1.0
- **Kind**: a2a_agent
- **Live-responds (last probe)**: True
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 100%

## Skills
- **Check whether a browser would allow a cross-origin API call (CORS)** — Use when the user hits a CORS error ("blocked by CORS policy", "No 'Access-Control-Allow-Origin' header", "preflight", "Failed to fetch" from a frontend) or is 
- **Check pasted preflight and response headers against the CORS rules** — Use when a CORS problem involves a server Border cannot reach (localhost, a dev or staging server, a private network, a custom port) or a POST, PUT, PATCH or DE

## URLs
- Agent card: https://border.clawhard.com/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/border.clawhard.com
- Documentation: https://border.clawhard.com/llms.txt