# Satsuma

> Satsuma is a sovereign, Ethereum-compatible Layer-1 blockchain built to host on-chain protocols for AI agents. Blocks every 2 seconds, deterministic BFT finality in ~6 seconds, open reads for everyone, and writes permissioned inside the protocol via an on-chain allowlist. Operated end to end by Satsuma Labs, a single accountable operator.

Key facts:
- Chain ID (EIP-155): 555555555
- Native token: SUMA (18 decimals, gas and settlement; no public sale)
- Block time: 2 seconds, fixed cadence
- Finality: deterministic BFT, typically ~3 blocks (~6 s)
- Execution: full EVM semantics; Solidity contracts deploy unmodified
- Interface: standard Ethereum JSON-RPC
- Public read RPC (no key required): https://rpc.satsuma.one/eth
- Access model: reads open to anyone; writes require the on-chain allowlist, enforced by consensus rules (not a network perimeter)

## Docs

- [Litepaper (markdown)](https://www.satsuma.one/litepaper.md): the full technical paper — architecture, access model, trust model, fees, measured performance
- [Litepaper (web)](https://www.satsuma.one/litepaper/): the same paper, typeset for reading
- [Litepaper (PDF)](https://www.satsuma.one/satsuma-litepaper.pdf): typeset PDF version
- [Architecture](https://www.satsuma.one/architecture/): consensus, execution, access model, and chain parameters
- [For AI agents](https://www.satsuma.one/agents/): why agents need a different chain, and how to connect
- [FAQ](https://www.satsuma.one/faq/): common questions answered plainly
- [Compare](https://www.satsuma.one/compare/): Satsuma vs public chains vs enterprise chains

## Live network

- [Explorer](https://explorer.satsuma.one/): live block explorer — blocks, transactions, addresses; reads open to everyone
- [Engineering blog](https://engineering.satsuma.one/): deep-dives on performance, architecture, and developer experience

## Optional

- [Homepage](https://www.satsuma.one/): marketing overview with live chain data