{"success":true,"custodyModel":"near-mpc-chain-signatures","keyAuthority":"ac-sandbox-yieldagent-x402.near","attestation":"cloudflare-worker","addresses":{"evm":"0x6905D04C3655625F6171f7b1e801a9325B1Fa1e8","bitcoin":"bc1qcd8ljsj7x0rq3sw7drrt7ragqmmt3tfsfxs6gy","starknet":"0x003a4e08a629315fba6f5400d7e28cdc00adb600846311bc6d59b31570906a21"},"paths":{"evm":"ethereum-1","bitcoin":"bitcoin-1"},"supportedChains":["evm","bitcoin","starknet"],"note":"All addresses are derived from the same NEAR MPC key authority. No private keys are held by this worker — signing requires fresh MPC quorum at execution time.","starknetNote":"Starknet uses Stark curve — pre-set address, not derived from NEAR MPC."}