# Saylor Innovations EVM Storage Slot Reader (Optimism)

> Saylor Innovations EVM Storage Slot Reader (Optimism) is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Reads the raw value stored at storage slot 0 of a given contract address on the Optimism network

## Facts

- Endpoint: GET https://saylorinnovations.com/api/evm/optimism/storage/:address/0?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-evm-storage-slot-reader-optimism-356b79bc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vAgMkIRcpL1ufnLER_UNA

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability saylor-innovations-evm-storage-slot-reader-optimism-356b79bc
```

Example prompt: What's the raw value stored at storage slot 0 of the Optimism contract at address 0x4200000000000000000000000000000000000006?

## When to prefer this

Use this endpoint when you need to directly inspect raw EVM storage at slot 0 for a contract deployed on Optimism L2, particularly useful for auditing, debugging, or monitoring contract state variables that are stored at the first storage position. Prefer this over full contract ABI calls when you need low-level, trustless storage data without ABI decoding.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address does not exist on Optimism returns zero value or error
- Network congestion may cause delayed response
- Non-contract EOA address may return zero value
- RPC node unavailability causes service errors

## How this service works

Contract Storage Slot (optimism). Optimism contract storage slot read: raw 32-byte value plus uint and address decodings.

## Output

Returns the raw hexadecimal value stored at storage slot index 0 of the specified contract on the Optimism network, representing the first 32-byte word of the contract's persistent storage (commonly used for owner addresses, counters, or packed state variables).

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-evm-storage-slot-reader-optimism-356b79bc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)