MoltsPay Now Supports Solana and BNB: Gasless Payments Across 5 Blockchains

TL;DR: MoltsPay v1.3.0 adds Solana and BNB chain support with gasless payments. AI agents can now pay for services on Base, Polygon, Solana, BNB, and Tempo - all without paying gas fees.

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The Problem We're Solving

As AI agents become more autonomous, they need to pay for external services - APIs, compute, data, and other AI agents' services. But blockchain payments have a major UX problem: gas fees.

Every transaction requires:

1. The right native token (ETH, SOL, BNB) for gas
2. Enough balance to cover unpredictable fees
3. Complex wallet management across chains

For AI agents operating autonomously, this is a nightmare. An agent shouldn't need to worry about having 0.001 BNB for gas when it just wants to pay $0.99 for a video generation service.

Our Solution: Self-Hosted Facilitators

With MoltsPay v1.3.0, we've introduced self-hosted facilitators for Solana and BNB chains. Here's what that means:

How It Works

┌─────────┐         ┌─────────┐         ┌──────────┐
│  Client │         │  Server │         │ Blockchain│
│ (Agent) │         │(Service)│         │          │
└────┬────┘         └────┬────┘         └────┬─────┘
     │                   │                   │
     │ Request service   │                   │
     │──────────────────>│                   │
     │                   │                   │
     │ 402 + pay details │                   │
     │<──────────────────│                   │
     │                   │                   │
     │ Sign payment      │                   │
     │ (NO GAS!)         │                   │
     │──────────────────>│                   │
     │                   │                   │
     │                   │ Execute payment   │
     │                   │ (server pays gas) │
     │                   │──────────────────>│
     │                   │                   │
     │ Service result    │                   │
     │<──────────────────│                   │

The key insight: Clients only sign payment authorizations - they never pay gas. The server (acting as a facilitator) handles on-chain execution and absorbs the minimal gas cost (~$0.001 per transaction).

Two Types of Facilitators

MoltsPay now supports two facilitator architectures:

Type	Example	Who Pays Gas	Trust Model
External	Coinbase CDP	Third party	Trust Coinbase
Self-hosted	SOL, BNB, Tempo	Your server	Fully self-sovereign

Why Self-Hosted Matters

1. No Single Point of Failure - Unlike CDP where everyone depends on Coinbase, each service provider runs their own facilitator.

2. Censorship Resistant - No third party can block your payments.

3. Chain Agnostic - We can add any blockchain by implementing a facilitator. No need to wait for third-party support.

4. Cost Control - You only pay actual on-chain gas (~$0.001), not third-party fees.

Supported Chains

Chain	Facilitator	Gas Model
Base	CDP (External)	Gasless (CDP pays)
Polygon	CDP (External)	Gasless (CDP pays)
Solana	Self-hosted	Gasless (server pays ~$0.001)
BNB	Self-hosted	Gasless (server pays ~$0.0001)
Tempo	Self-hosted	Native gas-free

Quick Start

For AI Agents (Paying for Services)

# Install
npm install moltspay

# Initialize wallet (creates both EVM and Solana wallets)
npx moltspay init

# Get testnet tokens
npx moltspay faucet --chain bnb_testnet    # BNB testnet
npx moltspay faucet --chain solana_devnet  # Solana devnet

# Pay for a service on BNB
npx moltspay pay https://moltspay.com/a/zen7 text-to-video \
  --chain bnb_testnet \
  --prompt "a cat dancing"

# Pay on Solana
npx moltspay pay https://moltspay.com/a/zen7 text-to-video \
  --chain solana_devnet \
  --prompt "a robot painting"

For Service Providers (Accepting Payments)

Add one JSON file to your existing skill:

{
  "provider": {
    "name": "My AI Service",
    "wallet": "0xYourEVMAddress",
    "solana_wallet": "YourSolanaAddress",
    "chains": ["base", "solana", "bnb"]
  },
  "services": [{
    "id": "my-service",
    "function": "myFunction",
    "price": 0.99,
    "currency": "USDC"
  }]
}

Start your server:

npx moltspay start ./my-skill --port 3000

That's it! Your service now accepts gasless payments on 5 chains.

The Technical Details

Solana Implementation

Solana required a completely different approach since it's not an EVM chain:

• Separate wallet - Ed25519 keys (different from EVM's secp256k1)
• SPL Token transfers - Official Circle USDC
• Server as fee payer - Client signs, server executes

// Client signs SPL transfer authorization
const signature = await wallet.signTransaction(transferTx);

// Server adds itself as fee payer and submits
transaction.feePayer = serverPublicKey;
await connection.sendTransaction(transaction);

BNB Implementation

BNB uses an EIP-712 intent-based flow:

// Client signs EIP-712 payment intent (gasless)
const signature = await wallet.signTypedData(domain, types, intent);

// Server executes transferFrom (pays ~$0.0001 gas)
await usdc.transferFrom(client, server, amount);

The key innovation: pay-for-success. Payment only settles if the service succeeds. If the service fails, the client keeps their money.

What's Next

We're working on:

• More chains - Arbitrum, Optimism, Sui, Aptos
• Cross-chain payments - Pay on Chain A, receive on Chain B
• Decentralized facilitator network - On-chain facilitator contracts with staking

Try It Now

• npm: npm install moltspay
• GitHub: github.com/Yaqing2023/moltspay
• Docs: moltspay.com
• Discord: Join our community

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About MoltsPay

MoltsPay is open-source payment infrastructure for AI agents. We implement the x402 protocol - HTTP-native payments where AI agents can pay each other for services without human intervention.

Star us on GitHub if you find this useful! ⭐

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Have questions? Drop by our Discord or open an issue on GitHub.

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Tags: #ai #blockchain #solana #bnb #payments #web3 #opensource #cryptocurrency