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Charge payments are the simple MPP path: the client signs an ERC-3009 authorization and the server settles it on-chain.

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1. Install the package

npm install @abstract-foundation/mpp mppx viem zod

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2. Register the server method

The Abstract package exposes a server-side charge method under @abstract-foundation/mpp/server. 
import { Mppx } from "mppx/server";
import { abstract } from "@abstract-foundation/mpp/server";
import { privateKeyToAccount } from "viem/accounts";

const serverAccount = privateKeyToAccount(
  process.env.SERVER_PRIVATE_KEY as `0x${string}`
);

const mpp = Mppx.create({
  methods: [
    abstract.charge({
      account: serverAccount,
      recipient: "0xYourWalletAddress",
      amount: "0.01",
      testnet: true,
    }),
  ],
  secretKey: process.env.MPP_SECRET_KEY!,
});

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3. Create the client method

The client signs the authorization but does not broadcast a transaction directly. 
import { abstractCharge } from "@abstract-foundation/mpp/client";
import { privateKeyToAccount } from "viem/accounts";

const charge = abstractCharge({
  account: privateKeyToAccount(process.env.PRIVATE_KEY as `0x${string}`),
});

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4. What the request needs

The charge request includes:
  • amount
  • currency
  • decimals
  • recipient
  • optional chainId
On Abstract, the normal token path is USDC.e with 6 decimals.

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5. When to use charge mode

Use charge mode when:
  • the client makes isolated requests
  • you want no channel lifecycle
  • the simplicity of one signature per request is acceptable

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Next

Move to Session Payments if the same client will hit your API repeatedly.