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Saylor Innovations EVM Contract Storage Slot Reader
x402
Saylor Innovations EVM Contract Storage Slot Reader is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Reads a single 32-byte storage slot from a smart contract on any of 16 supported EVM chains, returning the value as hex, unsigned integer, and address form.
Price / call$0.01
Success—
StatusUnknown
How this service works
Read one 32-byte contract storage slot on 16 EVM chains, returned as hex, integer and address form, for example proxy implementation slots.
Output
A JSON object containing the chain name, EIP-155 chain ID, contract address queried, normalized slot in hex, the 32-byte raw value as hex, the value as an unsigned integer string, the low 20 bytes decoded as an Ethereum address (or null if not address-like), a boolean is_zero indicating whether the slot is empty, and a source field identifying where the data was read from.
Example use cases
Detect proxy implementation on Base
“Can you read the EIP-1967 implementation slot — 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc — of contract 0xd9Db270c1B5E3Bd161E8c8503c55cEABeE709552 on Base and tell me what implementation address is stored there?”
Inspect raw storage slot on Arbitrum
“Read storage slot 0 from the contract 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Arbitrum — show me the hex value, integer value, and whether it decodes to an address.”
Verify Gnosis Safe owner slot
“Check what's stored at storage slot 3 of 0xbEbc44782C7dB0a1A60Cb6fe97d0b483032FF1C7 on the Gnosis chain — I want the raw hex, the uint, and if it looks like an address.”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/chain/storage?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to read a specific, known storage slot from a smart contract on one of 16 supported EVM chains — especially for proxy pattern inspection (EIP-1967, EIP-897), verifying delegated addresses, or inspecting raw contract state without deploying or running a full node. It is ideal for agents auditing contract upgradability, detecting proxy implementations, or verifying on-chain configuration values across Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, Avalanche, Gnosis, Linea, Scroll, Mantle, Blast, Sonic, Celo, Berachain, and Unichain.
Side effects
- Invalid or unsupported chain name/ID returns an error
- Malformed contract address (non-checksummed or wrong length) may cause a rejection
- Invalid slot format (neither decimal integer nor valid 0x hex) causes a parse error
- Contract does not exist on specified chain — slot will typically return zero value with is_zero=true
- Network or RPC timeout on the target chain returns a server error
- Payment not included or insufficient — returns HTTP 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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