# Saylor Innovations — Contract Event Logs (Optimism)

> Saylor Innovations — Contract Event Logs (Optimism) is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-03).

Fetches on-chain event logs emitted by a smart contract at a given address on the Optimism network.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/evm/optimism/events/:address?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-contract-event-logs-optimism-de899601
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4v2dG5TBdtcexG31d_qRK

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-contract-event-logs-optimism-de899601
```

Example prompt: Pull all the on-chain event logs for the smart contract at address 0x4200000000000000000000000000000000000042 on Optimism so I can see what events it has emitted.

## When to prefer this

Use this endpoint when you need to retrieve historical or recent on-chain event logs for a specific EVM smart contract deployed on the Optimism L2 network. Prefer this over generic blockchain explorers when you need programmatic, agent-accessible access to contract events without manual UI interaction.

## Known failure modes

- Invalid or malformed contract address returns an error
- Contract address with no emitted events returns an empty log list
- Network timeout or RPC node issues may cause delayed or failed responses
- Non-existent or undeployed contract address returns no results
- Rate limiting if too many requests are made in quick succession

## How this service works

Contract Event Logs (optimism). Optimism contract event logs: raw logs for a contract, optional ?topic0= event filter, up to 2,000 blocks, newest first, up to 200 rows.

## Output

Returns a list of event log entries emitted by the specified smart contract on the Optimism network, including event topics, data payloads, block numbers, transaction hashes, and log indices.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-contract-event-logs-optimism-de899601/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)