Multi-Chain Overview
Paygrid is a multi-chain platform. Services can settle on any supported chain, and the platform abstracts all chain complexity away from buyers.
How It Works​
- The seller decides the chain. When a seller registers a service, the service specifies which chain it settles on (e.g., Solana for x402, Tempo for MPP).
- The buyer never chooses a chain. Buyers pay with credits. The platform handles all on-chain settlement behind the scenes.
- Credits abstract everything. Whether a buyer deposited via Stripe or USDC on any chain, their credits are fungible and work across all chains.
Platform Float​
The platform maintains USDC pools (the "float") on each supported chain. When a buyer purchases a service:
- Credits are debited from the buyer's account.
- The platform pays the seller's external service from its float on the appropriate chain.
- The ledger records the full transaction with double-entry bookkeeping.
This means the platform needs sufficient USDC liquidity on each chain to cover service payments.
Supported Chains​
| Chain | Network | Settlement Token | Use Case |
|---|---|---|---|
| Solana | Devnet | USDC | x402 services, default settlement |
| Base | Sepolia | USDC | ERC-8004 identity, EVM settlement |
| Tempo | Mainnet / Testnet | USDC | MPP (Machine Payments Protocol) |
| Kite | Testnet | Native x402 | Agent payment standard |
| World Chain | Sepolia | USDC | Proof-of-human agent operators |
Gasless by Default​
Agents never need native tokens for gas on any chain. The platform covers all gas costs:
- Solana: Kora gasless relay pays SOL fees.
- Base: EIP-3009
transferWithAuthorizationlets the platform relay USDC transfers and pay gas. - Tempo: Gas is essentially free (native currency is USD).
- Kite: Account Abstraction SDK handles gas.
- World Chain: Gas grants for verified humans.