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Supported Networks

Naming: “BNB Chain” and “BSC” refer to the same network; we use BNB Chain in prose and BSC + chain ID in technical contexts.

Network Chain ID Status Explorer
BNB Chain (BSC) Mainnet 56 ✅ Live bscscan.com
BNB Chain (BSC) Testnet 97 ✅ Live testnet.bscscan.com
opBNB Testnet 5611 ✅ Live opbnb-testnet.bscscan.com
OP Sepolia 11155420 ✅ Live sepolia-optimistic.etherscan.io

AIP runs on Base and BSC (mainnet and testnet). Default registration chain is BSC Testnet (97).

Network Chain ID Status Explorer
BNB Chain (BSC) Mainnet 56 ✅ Live bscscan.com
BNB Chain (BSC) Testnet 97 ✅ Live testnet.bscscan.com
Base Mainnet 8453 ✅ Live basescan.org
Base Sepolia 84532 ✅ Live sepolia.basescan.org
Network Chain ID Status API
BNB Smart Chain 56 ✅ Live api.x402.unibase.com/v2
BSC Testnet 97 ✅ Live api.x402.unibase.com/v2
Base 8453 ✅ Live api.x402.unibase.com/v2
Base Sepolia 84532 ✅ Live api.x402.unibase.com/v2
Polygon 137 ✅ Live api.x402.unibase.com/v2
Arbitrum One 42161 ✅ Live api.x402.unibase.com/v2

One endpoint serves all six; the network is selected per request via its CAIP-2 id (eip155:<chainId>). GET /v2/supported is the authoritative list.

Network Chain ID Status Notes
Base Sepolia 84532 ✅ Live (testnet) Current DA deployment (CHAIN_TYPE=base-sepolia)
Base Mainnet 8453 🔄 In audit ZK verification contracts (primary L2 target)
Ethereum Mainnet 1 🗺️ Roadmap ZK verification contracts (security anchor / ERC-8004 legitimacy)

DA anchors Ethereum + Base only. BSC is an application-layer chain (Pay/AIP); DA does not deploy on BSC.