OpenPayment SDK + CLI

SDK and CLI for creating x402 stablecoin payment links that settle in USDC on Base.

Powered by OpenPayment and x402.

About OpenPayment

OpenPayment lets merchants, creators, developers, and AI agents accept USDC payments with shareable payment links and APIs. 0% platform fees, instant settlement to recipient wallet, and no sign-up required. Powered by x402.

Discover more about OpenPayment.

Features

• Public SDK method: create(...)
• CLI command: openpayment create ...
• Strict input validation before network calls
• Zero runtime dependencies

Install

npm i openpayment

Global CLI:

npm i -g openpayment

Install SKILL:

# OpenCode, Claude Code, Codex, Cursor...
npx skills add https://github.com/noncept/openpayment

# OpenClaw
openclaw skills install openpayment

If you are an AI Agent, check AGENTS.md.

SDK Usage

import { create } from "openpayment";

const result = await create({
  type: "SINGLE_USE",
  price: "10",
  payTo: "0xYourWalletAddress",
  network: "eip155:8453",
  description: "Example payment",
});

console.log(result.paymentId); // "ed5b8e83-607b-4853-90c6-f4f3ba821424"
console.log(result.url); // "https://openpayment.link/pay/?paymentId=ed5b8e83-607b-4853-90c6-f4f3ba821424"

SDK API

create(input) returns:

{
  paymentId: string;
  url: string;
}

CLI Usage

Default

openpayment create \
  --type "SINGLE_USE" \
  --price "10" \
  --payTo "0xYourWalletAddress" \
  --network "eip155:8453" \
  --description "Example payment"

Output:

Payment created successfully
paymentId: <paymentId>
url: <paymentUrl>

Example:

Payment created successfully
paymentId: ed5b8e83-607b-4853-90c6-f4f3ba821424
url: https://openpayment.link/pay/?paymentId=ed5b8e83-607b-4853-90c6-f4f3ba821424

Json

openpayment create \
  --type "SINGLE_USE" \
  --price "10" \
  --payTo "0xYourWalletAddress" \
  --network "eip155:8453" \
  --description "Example payment" \
  --json

Output:

{
  "paymentId": "<paymentId>",
  "url": "<paymentUrl>"
}

Example:

{
  "paymentId": "ed5b8e83-607b-4853-90c6-f4f3ba821424",
  "url": "https://openpayment.link/pay/?paymentId=ed5b8e83-607b-4853-90c6-f4f3ba821424"
}

Validation Rules

• type:
  • SINGLE_USE (one-time)
  • MULTI_USE (reusable fixed amount)
  • VARIABLE (reusable custom amount)
  • PROXY (reusable fixed amount + upstream API proxy call after settlement)
• price: positive decimal string/number (example: 10, 0.01)
• payTo: EVM address (0x + 40 hex chars)
• network: eip155:8453 or eip155:84532
• description: optional string, max 500 chars
• resourceUrl: required only for PROXY (https://...)

Links:

• OpenPayment website
• AGENTS.md
• SKILL.md

License

OpenPayment is released under the MIT License.