{"uid":"cap_pUWfR6eDZz_oAR0nzWxjG","slug":"agent-data-tools-revmesh2074-workers-dev-arbitrum-storage-slot-read-2cd04e0a","name":"Arbitrum Storage Slot Read","description":"Read one raw storage slot of a contract on Arbitrum One (eth_getStorageAt): the 32-byte word, as a number and, when it holds one, as an address. Slot is a decimal index or a 0x 32-byte key (mapping and proxy slots). Use to inspect contract state that has no getter, owners or implementation pointers; for proxies use arb_proxy. A malformed address or slot is rejected with 400, uncharged.","url":"https://agent-data-tools.revmesh2074.workers.dev/arb/storage?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["address"],"properties":{"slot":{"type":"string","description":"Slot: a decimal index (0, 1, 2…) or a 0x 32-byte key"},"address":{"type":"string","description":"0x contract address"}}},"responseSchema":{"type":"object","properties":{"slot":{"type":"string"},"block":{"type":"number"},"chain":{"type":"string"},"value":{"type":"string"},"address":{"type":"string"},"chainId":{"type":"number"},"asNumber":{"type":"string"},"asAddress":{"type":"string"}}},"example":null,"exampleRequest":null,"tags":[],"displayCostAmount":"0.01","displayCostAsset":"USD","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_03g7L_Xz2OHGbfjpviO8b","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":"agent-data-tools.revmesh2074.workers.dev","brandSlug":"agent-data-tools-revmesh2074-workers-dev-x402","brandBaseUrl":"https://agent-data-tools.revmesh2074.workers.dev","brandDocsUrl":null,"whatItDoes":"Reads a raw 32-byte storage slot from any contract on Arbitrum One using eth_getStorageAt, returning the value as hex, number, and optionally as an address.","exampleAgentPrompt":"What's stored at slot 0 of the Arbitrum contract at 0x912CE59144191C1204E64559FE8253a0e49E6548 — show me the raw hex, the number value, and whether it looks like an address.","exampleUseCases":[{"title":"Inspect proxy implementation pointer","prompt":"Can you read storage slot 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc on the Arbitrum contract 0x5979D7b546E38E414F7E9822514be443A4800529? I want to know what implementation address is stored there."},{"title":"Find contract owner without a getter","prompt":"The Arbitrum contract at 0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9 doesn't expose an owner() function — can you read slot 0 and tell me what address is stored there?"},{"title":"Audit mapping slot for a specific key","prompt":"I need to check the raw storage value at slot 0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef on Arbitrum contract 0xaf88d065e77c8cC2239327C5EDb3A432268e5831. What's the 32-byte value there?"}],"resultDescription":"Returns an object containing: the resolved slot key, the current block number, the chain name and chain ID (Arbitrum One), the raw 32-byte hex value, its decimal representation as a string (asNumber), and its interpretation as an EVM address (asAddress) when the value fits one.","failureModes":["400 Bad Request if the contract address is malformed or not a valid 0x address — not charged","400 Bad Request if the slot string is not a valid decimal index or 0x 32-byte hex key — not charged","Empty or zero value returned if the slot has never been written (not an error)","Possible RPC timeout or upstream Arbitrum node error for very recent blocks"],"whenToPreferThis":"Use this endpoint when you need to inspect raw contract storage on Arbitrum One that is not exposed by any public getter function — such as proxy implementation pointers, owner variables stored directly in a slot, or mapping/struct entries accessed by a computed key. For proxy contracts specifically, the sibling arb_proxy endpoint is recommended. Prefer this over general Ethereum storage reads when the target contract is deployed on Arbitrum One.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-24T05:40:19.734Z","isFirstParty":false,"canonicalSlug":"agent-data-tools-revmesh2074-workers-dev-arbitrum-storage-slot-read-2cd04e0a"}