MoltsPay is a gasless payment protocol for AI agents using USDC on Base, Polygon, BNB Chain, and Solana.

SDK and protocol are free and open source. Only pay for services consumed.

MoltsPay FAQ

Q: What is the Universal Payment Protocol (UPP)?

UPP is MoltsPay's unified payment abstraction layer. It integrates four distinct protocols (x402, MPP, Solana Pay-for-Success, and BNB Pre-Approval) behind a single API, so AI agents can pay across any supported chain with one call.

Q: Do I need ETH or gas?

No. MoltsPay uses x402 protocol - both payers and receivers only need USDC.

Q: How do I add payments to my AI agent?

Install MoltsPay SDK, initialize wallet, use pay function. Three lines of code.

Q: Why is MoltsPay's integration so user-friendly?

A single pay() call works on any supported chain; the protocol layer auto-detects the chain and handles signatures. Gasless by default - no ETH, SOL, or BNB needed. Only three lines of code to get started.

Q: How many blockchains does MoltsPay support?

MoltsPay supports 8 networks: 4 mainnets (Base, Polygon, Solana, BNB Chain) and 4 testnets (Base Sepolia, Solana Devnet, BNB Testnet, Tempo Moderato). USDC is the primary payment token across all chains.

Q: Does MoltsPay support both EVM and Solana chains?

Yes. MoltsPay is the first payment protocol to unify EVM chains (Base, Polygon, BNB) and SVM chains (Solana) under one API. It manages both secp256k1 and Ed25519 wallets and routes payments via the appropriate protocol automatically.

Q: Can AI agents pay each other?

Yes. Fully autonomous agent-to-agent commerce without human intervention.

What is MoltsPay?什么是 MoltsPay？ +

MoltsPay is a gasless payment protocol for AI agents. It enables autonomous AI agents to pay for services using USDC on Base, Polygon, BNB Chain, and Solana blockchains, without needing ETH for gas fees. MoltsPay 是一个面向 AI Agent 的免 Gas 支付协议。它让 AI Agent 能够使用 USDC 在 Base、Polygon、BNB Chain 和 Solana 区块链上自主支付服务费用，无需 ETH 作为 Gas。

What is the Universal Payment Protocol (UPP)?什么是 Universal Payment Protocol（UPP）？ +

The Universal Payment Protocol (UPP) is MoltsPay's core innovation — a unified payment abstraction layer that lets AI agents pay across multiple blockchains using a single API. UPP integrates four distinct payment protocols (x402 for Base/Polygon, MPP for Tempo, Solana Pay-for-Success, and BNB Pre-Approval) behind one interface. The protocol layer automatically detects the target chain, selects the correct facilitator, generates signatures, and verifies settlement — so developers never implement chain-specific payment flows. See the whitepaper for the full architecture. Universal Payment Protocol（UPP，通用支付协议）是 MoltsPay 的核心创新——一个统一的支付抽象层，让 AI Agent 通过单一 API 在多条区块链上完成支付。UPP 将四种不同的支付协议（Base/Polygon 的 x402、Tempo 的 MPP、Solana Pay-for-Success 和 BNB Pre-Approval）整合到一个接口下。协议层会自动识别目标链、选择正确的 facilitator、生成签名并验证结算——开发者无需针对每条链单独实现支付流程。完整架构请参阅白皮书。

Do I need ETH or gas to use MoltsPay?使用 MoltsPay 需要 ETH 或 Gas 吗？ +

No. MoltsPay uses the x402 protocol with Coinbase's facilitator service to handle all gas fees. Both payers and receivers only need USDC — no ETH required. 不需要。MoltsPay 使用 x402 协议，通过 Coinbase 的 facilitator 服务处理所有 Gas 费用。付款方和收款方都只需要 USDC，无需 ETH。

How do I add payments to my AI agent?如何给我的 AI Agent 添加支付功能？ +

Install the MoltsPay SDK (npm install moltspay or pip install moltspay), initialize a wallet with npx moltspay init, and use the pay function to call paid services. Three lines of code to get started. 安装 MoltsPay SDK（npm install moltspay 或 pip install moltspay），用 npx moltspay init 初始化钱包，然后用 pay 函数调用付费服务。三行代码即可开始。

Why is MoltsPay's integration so user-friendly?为什么 MoltsPay 的集成如此易用？ +

Three reasons: (1) one API for every chain — a single moltspay.pay() call works on any supported chain; UPP automatically detects the chain, selects the right facilitator, and handles signatures. (2) Gasless by default — users never need ETH, SOL, or BNB to pay; x402 uses EIP-3009 on EVM, Solana uses a server-as-fee-payer model, and BNB uses pre-approval. (3) Three lines to ship — install the SDK, initialize a wallet, call pay. Developers don't have to learn chain-specific payment mechanics like EIP-3009, SPL transfers, or EIP-712 — UPP abstracts all of that away. 三个原因：（1）一个 API 覆盖所有链——一次 moltspay.pay() 调用即可在任意支持链上工作；UPP 会自动识别链、选择合适的 facilitator 并处理签名。（2）默认免 Gas——用户无需 ETH、SOL 或 BNB 就能付款；EVM 上的 x402 使用 EIP-3009，Solana 使用服务端代付模型，BNB 采用 pre-approval。（3）三行代码上线——安装 SDK、初始化钱包、调用 pay。开发者无需学习每条链各自的支付机制（如 EIP-3009、SPL 转账、EIP-712），UPP 把这些细节全部屏蔽。

How many blockchains does MoltsPay support?MoltsPay 支持多少条区块链？ +

MoltsPay supports 8 networks across two virtual machines (EVM and SVM): 4 mainnets — Base (chain ID 8453), Polygon (137), Solana (mainnet), BNB Chain (56); and 4 testnets — Base Sepolia (84532), Solana Devnet, BNB Testnet (97), and Tempo Moderato (42431). USDC is the primary payment token across all supported chains, and MoltsPay is the first protocol to unify EVM and SVM chains under a single API. MoltsPay 支持 8 个网络，横跨两种虚拟机（EVM 与 SVM）：4 个主网——Base（链 ID 8453）、Polygon（137）、Solana（mainnet）、BNB Chain（56）；以及 4 个测试网——Base Sepolia（84532）、Solana Devnet、BNB Testnet（97）和 Tempo Moderato（42431）。USDC 是所有支持链上的主要支付代币，MoltsPay 也是首个将 EVM 与 SVM 链统一在同一 API 下的协议。

Does MoltsPay support both EVM and Solana chains?MoltsPay 同时支持 EVM 和 Solana 吗？ +

Yes — MoltsPay is the first payment protocol to unify EVM and SVM under one API. EVM chains (Base, Polygon, BNB) use secp256k1 cryptography and ERC-20 / TIP-20 tokens with a single wallet address across all EVM chains. Solana (SVM) uses Ed25519 cryptography and the SPL token standard, which requires a separate wallet (different key type). MoltsPay manages both wallet types transparently — moltspay status shows balances on every configured chain, and the SDK routes each payment through the appropriate protocol automatically. 是的——MoltsPay 是首个在单一 API 下同时支持 EVM 和 SVM 的支付协议。EVM 链（Base、Polygon、BNB）使用 secp256k1 密码学与 ERC-20 / TIP-20 代币标准，同一个钱包地址可用于所有 EVM 链。Solana（SVM）使用 Ed25519 密码学和 SPL 代币标准，需要一个单独的钱包（密钥类型不同）。MoltsPay 会统一管理两种钱包——moltspay status 可查看所有已配置链上的余额，SDK 会自动把每笔支付路由到合适的协议。

Can AI agents pay each other automatically?AI Agent 之间可以自动互相支付吗？ +

Yes. MoltsPay enables fully autonomous agent-to-agent commerce. One agent can discover services, pay with crypto, and receive results — all without human intervention. 可以。MoltsPay 支持完全自主的 Agent 对 Agent 商业交易。一个 Agent 可以发现服务、用加密货币支付、接收结果——全程无需人工干预。

Is MoltsPay free to use?MoltsPay 免费吗？ +

The MoltsPay SDK and protocol are completely free and open source. You only pay for the services you consume — there are no platform fees or hidden charges. MoltsPay SDK 和协议完全免费且开源。你只需为使用的服务付费——没有平台费或隐藏费用。

Frequently Asked Questions

常见问题

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