{"name":"handle-availability","description":"Checks whether a social handle is available on X and returns public profile metrics when it is already claimed. Same read-only X API backend as x-handle-availability, exposed under a general discovery slug for brand launch workflows; returns available=true for not-found handles. Use it as a handle availability checker, social username availability check, or brand handle pre-flight.","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":true,"status":"not_found","source":"X API v2 user lookup"},"x402_payment_required":true,"x402_facilitator":"https://api.cdp.coinbase.com/platform/v2/x402"}