{"name":"onyx_browser_eval","tier":"metered","price_usdc":"0.004","endpoint":"https://onyx-actions.onrender.com/v1/onyx_browser_eval","method":"POST","input_schema":{"type":"object","properties":{"expression":{"type":"string","description":"JavaScript expression. Last value is returned."},"await_promise":{"type":"boolean","default":false,"description":"If the expression returns a Promise, wait for it."}},"required":["expression"]},"description":"Evaluate a JavaScript expression on the current CDP-controlled Chrome page and return the result by value. Use as a power-tool when the specific click/extract/type tools don't fit — pull deeply nested DOM data, dispatch synthetic events, read computed styles. Demo mode echoes the expression length without executing.","when_to_use":null,"vs_alternatives":null,"example_request":null,"example_response":null,"settle_to":"0x3fD9ee1373562f894D322B37DFFAd7a5D2b2d78f","network":"base","facilitator":"https://facilitator.xpay.sh","payment_required":true,"free_introspection":true,"note":"GET this URL = free introspection card. POST with x402 payment header to call."}