{"uid":"cap_hGB0C7xX3CyTAoQ78K8GA","slug":"synthora-eth-getcode-contract-checker-cfaef85e","name":"SYNTHORA eth_getCode Contract Checker","description":"Check if an address is a contract via eth_getCode, with EIP-7702 delegation detection. Deterministic, Ed25519-signed.","url":"https://rpc-code.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","required":["address"],"properties":{"chain":{"type":"string","description":"chain"},"address":{"type":"string","description":"address"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_7rgO17TzcQ7QjsHyJDMCv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether an Ethereum address is a smart contract (vs EOA) using eth_getCode, with EIP-7702 delegation detection, returning a signed deterministic result","exampleAgentPrompt":"Can you check if 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 is a smart contract on Ethereum mainnet — I want to know if it has deployed bytecode or if it's an EIP-7702 delegated account?","exampleUseCases":[{"title":"Verify contract status before fund transfer","prompt":"Before I send my tokens to 0x742d35Cc6634C0532925a3b844Bc9e7595f42bE, can you check if that address is actually a smart contract or just a regular wallet? I need to make sure I'm not sending to a contract that might not handle the transfer correctly."},{"title":"Detect EIP-7702 delegation in Base wallets","prompt":"I'm auditing our Base network activity and need you to check a few addresses — specifically 0x8ba1f109551bD432803012645Ac136ddd64DBA72 and others — to see which ones are using EIP-7702 delegation. I want a cryptographically signed result I can verify."},{"title":"Validate address type across multiple chains","prompt":"Can you check whether 0x1234567890abcdef1234567890abcdef12345678 is a contract or EOA on Ethereum, and also verify the same address's status on Base? I need deterministic signed results to audit our integration layer."}],"resultDescription":"Returns whether the address has deployed bytecode (i.e. is a contract), whether it is an EIP-7702 delegated EOA, and a deterministic Ed25519-signed response confirming the result's authenticity. No result is returned and no charge is made on upstream RPC failure.","failureModes":["Invalid or malformed Ethereum address returns an error","Unsupported or unknown chain identifier causes a failure","Upstream RPC node failure returns no result and incurs no charge","Missing or invalid X-WALLET header may block access after the 3 free calls","Malformed POST body missing required fields returns validation error"],"whenToPreferThis":"Use this endpoint when you need a cryptographically signed, deterministic answer about whether an address is a contract or EOA on a supported EVM chain, especially when EIP-7702 delegation detection matters. Prefer this over generic RPC calls when you need auditability via Ed25519 signatures, or when integrating into an x402-payment-enabled pipeline on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:36:27.670Z","isFirstParty":false}