> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aegis-kyt.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Networks

> Supported chain values for the {chain} path parameter.

The `{chain}` path param is a friendly slug.  Map of slug → CAIP-2
chain ID + Aegis coverage below.

| `{chain}`   | CAIP-2         | Aegis |
| ----------- | -------------- | ----- |
| `eth`       | `eip155:1`     | ✅     |
| `bsc`       | `eip155:56`    | ✅     |
| `tron`      | (TRX native)   | ✅     |
| `polygon`   | `eip155:137`   | —     |
| `base`      | `eip155:8453`  | —     |
| `arbitrum`  | `eip155:42161` | —     |
| `optimism`  | `eip155:10`    | —     |
| `avalanche` | `eip155:43114` | —     |
| `fantom`    | `eip155:250`   | —     |
| `btc`       | (BTC native)   | —     |
| `sol`       | (SOL native)   | —     |
| `ltc`       | (LTC native)   | —     |

**Aegis full coverage** is currently limited to **ETH, BSC, TRON** —
the only chains where we ingest the full transaction graph end to
end.  Other chains return `400 unsupported_network`.

Aegis is the single verdict surface.  Where the on-chain graph is
sparse, additional commercial scoring runs under the hood (opt-in) and
is folded into the same Aegis verdict — there is no separate
multi-provider tier to select.

## Address format

| Chain family                                                         | Format              | Case-handling               |
| -------------------------------------------------------------------- | ------------------- | --------------------------- |
| EVM (eth, bsc, polygon, base, arbitrum, optimism, avalanche, fantom) | `0x` + 40 hex       | Lowercased server-side      |
| TRON                                                                 | base58 (T…34 chars) | Case-sensitive — sent as-is |
| BTC                                                                  | base58 / bech32     | Case-sensitive              |
| SOL                                                                  | base58 (32 chars)   | Case-sensitive              |
| LTC                                                                  | base58 / bech32     | Case-sensitive              |

A wrong-case TRON address won't be found in our index — a `0x6b17…`
EVM address can be sent in any case and we'll normalise.

## Settlement chain

Independent of `{chain}`.  Today the x402 quote always settles on
**Base mainnet** (or Base Sepolia for testnet calls), regardless of
which chain you're querying.  Multi-chain settlement is on the
roadmap.