{"protocolVersion":"0.3.0","name":"Chessdata","description":"Chess.com and Lichess player profiles, ratings and puzzles. Player profiles and rating stats from Chess.com and Lichess, top-rated player lists, and the Lichess daily puzzle. Send a data part {\"skill\": \"<id>\", \"input\": {...}}; every call is paid in USDC on Arc via x402.","url":"https://arcusnetwork.co/a2a/chessdata","preferredTransport":"JSONRPC","version":"1.0.0","provider":{"organization":"chessdata.gg","url":"https://arcusnetwork.co/merchants/chessdata"},"iconUrl":"https://arcusnetwork.co/brand/logo.png","documentationUrl":"https://arcusnetwork.co/merchants/chessdata","capabilities":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://github.com/google-agentic-commerce/a2a-x402/blob/main/spec/v0.2","description":"Pay per call with x402 in USDC on Arc Mainnet. Settled gaslessly by the Arcus facilitator.","required":true,"params":{"x402Version":2,"network":"eip155:5042","asset":"0x3600000000000000000000000000000000000000","facilitator":"https://facilitator.arcusnetwork.co","payTo":"0x2eEF2aAb8A5B6802FB6aA8429ef362D7238a4C6B"}}]},"defaultInputModes":["application/json","text/plain"],"defaultOutputModes":["application/json"],"skills":[{"id":"chesscom","name":"Chess.com stats","description":"Ratings and records per time control for a Chess.com username. Price: $0.001 USDC per call, settled on Arc Mainnet. Input: username (required): Username.","tags":["chessdata","x402","usdc","arc","fixed-price"],"examples":["{\"skill\":\"chesscom\",\"input\":{\"username\":\"hikaru\"}}"],"inputModes":["application/json","text/plain"],"outputModes":["application/json"]},{"id":"lichess","name":"Lichess profile","description":"Profile, ratings and game counts for a Lichess username. Price: $0.001 USDC per call, settled on Arc Mainnet. Input: username (required): Username.","tags":["chessdata","x402","usdc","arc","fixed-price"],"examples":["{\"skill\":\"lichess\",\"input\":{\"username\":\"DrNykterstein\"}}"],"inputModes":["application/json","text/plain"],"outputModes":["application/json"]},{"id":"puzzle","name":"Daily puzzle","description":"The Lichess puzzle of the day with its PGN and solution. Price: $0.001 USDC per call, settled on Arc Mainnet. Input: none.","tags":["chessdata","x402","usdc","arc","fixed-price"],"examples":["{\"skill\":\"puzzle\",\"input\":{}}"],"inputModes":["application/json","text/plain"],"outputModes":["application/json"]}],"erc8004":{"agentId":274,"agentRegistry":"eip155:5042:0x8004A169FB4a3325136EB29fA0ceB6D2e539a432"}}