# Query EVM state. Simulate EVM calls.

Read current or historical EVM state, simulate calls against pinned or modified state, and query inputs, results, observations, and state changes with SQL.

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Read current or historical EVM state and simulate calls against pinned or modified state. Query the results, observations, and state changes with SQL.

Open a runnable guide for a complete workflow. Use the generated reference for exact signatures and return values.

## Reference

- [Functions](/docs/functions.md) — 117 public functions
- [Types](/docs/types.md) — 77 logical types
- [Tables and views](/docs/tables.md) — 21 public data objects
- [Guides](/docs/guides.md) — 3 runnable guides

## Guides

- [Query contract state with SQL](/docs/guides/query-contract-state-with-sql.md) — Call an EVM contract function from SQL, pin the read to one block, and use a column as the function argument.
- [Analyze ERC-20 transfers for a UTC day](/docs/guides/analyze-erc20-transfers-for-a-utc-day.md) — Fetch ERC-20 Transfer logs for one UTC day and query the decoded rows with SQL.
- [Compare Uniswap V3 and V4 routes](/docs/guides/compare-uniswap-v3-v4-routes.md) — Compare Uniswap V3, V4, and split ETH → USDC routes at one pinned block. Simulate family leaders, rank after gas, and inspect every check and rejection reason.