{"name":"social-handle-check","description":"Checks whether a proposed X/Twitter handle is claimed and returns public account metrics when it exists. Same read-only X API backend as x-handle-availability. Use it as a social handle check, X username availability lookup, or startup brand handle lookup.","price":"$0.005","method":"POST","input_schema":{"properties":{"username":{"type":"string","description":"X/Twitter handle to check, with or without @, e.g. 'launchforge'."}},"required":["username"]},"input_example":{"username":"launchforge"},"output_example":{"username":"launchforge","available":false,"status":"claimed","source":"X API v2 user lookup"},"x402_payment_required":true,"x402_facilitator":"https://api.cdp.coinbase.com/platform/v2/x402"}