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Base Contract Storage Slot Reader
x402
Base Contract Storage Slot Reader is a paid API for AI agents from x402-data-api.bodhinindustries.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Reads a raw 32-byte storage slot from any Base chain contract address, returning the value in multiple decoded formats (hex, uint, address, bool) computed live from chain state.
Price / call$0.01
Success—
StatusUnknown
How this service works
Self-computed Base onchain toolkit for AI agents: ERC-20 safety scan, manipulation-resistant TWAP price oracle, gas/fee oracle, calldata decoder, token/address/contract intel, wallet approval-risk audit, and batch token triage — all computed live from raw Base chain, no third-party data.
Output
Returns a JSON object with: the raw 32-byte hex word, the normalized slot key, the Base block height at read time, the value decoded as an unsigned decimal string, a checksummed 20-byte address (if applicable), boolean flags for zero/non-zero, and an ISO-8601 timestamp. No third-party data is used — all values are computed live from Base chain.
Example use cases
Proxy admin address lookup
“Hey, can you check what address is stored in the admin slot (0xb53127684a568b3173ae13b9f8a6016e243e63b6de8a3b4fd5b6b8461a4a01c) of the Base contract 0x3fE42b3A1c4E47a2eE1dA462bec2B621b2e89B58? I want to know who controls this proxy without relying on any block explorer.”
ERC-20 owner slot audit
“Can you read storage slot 0 of the Base contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and tell me the raw hex, the decoded address, and whether it's a zero value? I'm trying to verify who the owner is directly from chain state.”
Packed storage variable inspection
“I need to inspect slot 1 of this Base contract 0x2Ae3F1Ec7F1F5012CFEab0185bfc7aa3cf0DEc22 — can you pull the raw 32-byte value and decode it as both a uint and a boolean so I can figure out what's packed in there?”
Technical details
Endpoint
GEThttps://x402-data-api.bodhinindustries.workers.dev/storageWhen to prefer
Use this endpoint when you need to read raw EVM storage slots from Base contracts without relying on ABIs or third-party indexers. Ideal for inspecting proxy implementation addresses (EIP-1967), reading packed storage variables, auditing admin/owner slots, or verifying onchain state directly from chain. Prefer this over general blockchain explorers when you need machine-readable decoded output (uint, address, bool) in a single call with no external data dependencies.
Side effects
- Invalid contract address format returns an error — address must be a valid checksummed or lowercase Base address
- Invalid slot format (neither valid hex 0x.. nor decimal integer) causes a parse error
- Contract address does not exist on Base — returns zero value (not an error, but may be misleading)
- Slot out of range or malformed hex returns decode error
- Network or RPC timeout from Base node causes a 5xx response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| slotrequired | string | Storage slot as hex (0x..) or decimal. Example is the EIP-1967 implementation slot. |
| addressrequired | string | Base contract address whose storage to read. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| raw | string | raw 32-byte word (hex) |
| slot | string | normalized 32-byte slot key |
| block | integer | Base block height |
| asBool | boolean | word is non-zero |
| asUint | string | word as unsigned decimal |
| isZero | boolean | whole word is zero |
| address | string | contract read |
| asAddress | string | checksummed low-20-bytes (or null) |
| computedAt | string | ISO-8601 timestamp |
| thirdPartyDataUsed | boolean | always false |
Tags
x402
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