Installation

The Mento SDK v3 requires Node.js 18+ and viem as a peer dependency (ethers.js is no longer used). The package is published in dual CJS/ESM format with an exports map for Node and bundlers.

npm install @mento-protocol/mento-sdk viem
# or
pnpm add @mento-protocol/mento-sdk viem
# or
yarn add @mento-protocol/mento-sdk viem

Peer dependency: viem ^2.21.44 (or compatible v2.x). The SDK uses viem for chain config, encoding, and wallet interactions.

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Create the client

import { Mento, ChainId } from '@mento-protocol/mento-sdk'

// Use default public RPC for the chain
const mento = await Mento.create(ChainId.CELO)

// Or pass a custom RPC URL
const mento = await Mento.create(ChainId.CELO, 'https://your-rpc-url.com')

// Or pass an existing viem PublicClient (e.g. for custom transport or chain)
const mento = await Mento.create(ChainId.CELO, yourPublicClient)

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What you can do next

Area	Guides
Discovery	Discovering tokens, pools and routes — tokens, pools, routes, trading status
Trading	Getting a quote, Initiating a swap
Liquidity	Liquidity management — add/remove liquidity, zap in/out for FPMM pools
Borrow	Borrow (CDP) — open/adjust/close troves, fees, system params

Runnable examples: mento-sdk-examples.