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Ethereum Contract Storage Slot Reader
x402
Ethereum Contract Storage Slot Reader is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-30).
Reads the value stored at storage slot 0 of a given Ethereum smart contract address from on-chain data
Price / call$0.002
Success—
StatusUnknown
How this service works
Contract Storage Slot (ethereum). Ethereum contract storage slot read: raw 32-byte value plus uint and address decodings.
Output
Returns the raw 32-byte value stored at storage slot 0 of the specified Ethereum contract address, pulled directly from on-chain EVM state. This can represent an integer, an address, a boolean flag, a packed value, or a pointer depending on how the contract lays out its storage.
Example use cases
Inspect proxy implementation pointer
“What address is stored in storage slot 0 of the Ethereum contract 0x1F98431c8aD98523631AE4a59f267346ea31F984? I want to check what implementation it's pointing to.”
Audit contract owner variable
“Can you fetch the raw value at storage slot 0 for the Ethereum contract 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2? I'm trying to verify who the owner is directly from on-chain state.”
Debug unexpected contract behavior
“I'm debugging a smart contract issue — can you read storage slot 0 of the Ethereum contract at 0x6B175474E89094C44Da98b954EedeAC495271d0F and tell me what's currently stored there?”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/evm/ethereum/storage/:address/0?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to directly inspect raw on-chain EVM storage state for a specific Ethereum contract without using a full node RPC setup. It is ideal for quickly auditing storage slot 0 (often the owner, implementation pointer, or primary state variable) of any deployed Ethereum contract. Prefer this over general blockchain explorers when you need a programmatic, agent-callable lookup that returns machine-readable storage data for downstream processing.
Side effects
- Invalid Ethereum address format returns an error
- Address is an EOA (externally owned account) with no contract code — slot returns 0x00
- Network connectivity issues or node unavailability may cause timeouts
- Incorrect address checksum may result in rejection or unexpected results
- The slot value may be 0x0000...0000 if nothing has been written to slot 0 yet
Tags
x402
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