> For the complete documentation index, see [llms.txt](https://help.multisig.ledger.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.multisig.ledger.com/reference.md).

# Reference

The Ledger Multisig Transaction Service API provides a comprehensive suite of endpoints designed to orchestrate the lifecycle of multi-signature transactions. It serves as the backend infrastructure for tracking Safe accounts, managing pending signatures, and broadcasting fully executed transactions.

This reference documentation details every available endpoint, enabling you to build custom integrations, automate treasury flows, or develop interface extensions on top of the Ledger Multisig ecosystem.

#### Supported Networks & Endpoints

The Ledger Multisig API is deployed across multiple EVM chains. While the endpoint structure remains consistent, you must target the specific `chain_id` or base URL corresponding to your desired network.

Use the selector below to identify the correct Chain ID for your requests:

| Supported Network          | Chain ID  |
| -------------------------- | --------- |
| Ethereum Mainnet           | 1n        |
| Base                       | 8453n     |
| Arbitrum                   | 42161n    |
| Polygon                    | 137n      |
| Optimism                   | 10n       |
| Ethereum Sepolia (testnet) | 11155111n |