{"ok":true,"product":"Script Master Labs x402 Data API","note":"Playground demo is free. Production calls use x402 ($0.001) OR marketplace key header X-Api-Market-Key / X-API-Key configured in seller dashboard. Do NOT send X-Coingecko-Key, X-Sam-Key, or X-Openfda-Key — upstream keys are server-side only.","try":{"free_demo":"GET /x402/playground/demo","free_grants_sample":"GET /x402/playground/grants?keyword=veteran","free_fred_sample":"GET /x402/playground/fred?series_id=GDP","paid_live":"GET /x402/grants?keyword=veteran (x402 or marketplace key)"},"auth_for_paid":{"marketplace":"X-Api-Market-Key: <secret from seller dashboard>","also_accepted":["X-API-Key","Authorization: Bearer <secret>"],"not_accepted_in_openapi":["X-Coingecko-Key","X-Sam-Key","X-Openfda-Key"]},"extensions":{"bond402":{"bond_id":"bnd_7482037174f97786","result":"pass","check_id":"ok.v1","reason":"2xx json in time","directory":"https://mcp-x402.onrender.com/x402/mesh","next":{"mesh":"https://mcp-x402.onrender.com/x402/mesh"}}}}