{"uid":"cap_gCc3NKnuUv0yEERevh6Mq","slug":"saylor-innovations-evm-base-contract-storage-slot-0-reader-aa770db2","name":"Saylor Innovations — EVM Base Contract Storage Slot 0 Reader","description":"Contract Storage Slot (base). Base contract storage slot read: raw 32-byte value plus uint and address decodings.","url":"https://saylorinnovations.com/api/evm/base/storage/:address/0?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2zIQtFsZZ8CN1RG3QeLs5","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Reads storage slot 0 of a smart contract deployed on the Base EVM-compatible blockchain","exampleAgentPrompt":"What's the raw value stored in storage slot 0 of the contract at 0x4200000000000000000000000000000000000006 on the Base blockchain?","exampleUseCases":[{"title":"Verify contract ownership variable","prompt":"Can you read storage slot 0 of the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base? I want to confirm what the owner address or admin variable is set to on-chain."},{"title":"Debug unexpected contract state","prompt":"Something looks wrong with the contract at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA on Base — can you pull the raw value from its storage slot 0 so I can cross-check what's actually stored versus what the UI is showing?"},{"title":"Monitor proxy implementation slot","prompt":"I need to check what value is currently sitting in storage slot 0 of the proxy contract at 0x2Ae3F1Ec7F1F5012CFEab0185bfc7aa3cf0DEc22 on Base to see if the implementation address has changed."}],"resultDescription":"Returns the raw 32-byte value stored at storage slot index 0 of the specified smart contract address on the Base EVM blockchain, representing the on-chain state of that storage position at query time.","failureModes":["Invalid or malformed contract address returns an error or zero value","Contract does not exist at the given address on Base — may return zero bytes rather than an error","Network congestion or RPC node issues may cause timeouts","Slot 0 may be uninitialized (returns 0x0000...0000) if the contract uses a different storage layout","Address is an EOA (externally owned account) rather than a contract — returns empty storage"],"whenToPreferThis":"Choose this endpoint when you need to directly read the raw on-chain storage value at slot 0 of a specific contract on the Base network, particularly for debugging contract state, verifying proxy implementations, or inspecting low-level EVM storage without calling a contract function. Prefer this over ABI-based contract calls when you don't have the ABI or need the raw bytes rather than a decoded value.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:42:08.167Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-evm-base-contract-storage-slot-0-reader-aa770db2"}