Networks

MPP_STELLAR_NETWORK accepts stellar:testnet or stellar:pubnet and nothing else; anything else is a configuration error reported once via PREFLIGHT.

Only testnet has a default RPC endpoint. Pubnet deliberately has none, so a pubnet run must pass --rpc-url explicitly rather than silently reaching a third-party node.

The x402 payment checks also pay on Base Sepolia (eip155:84532), through --network (MCP: network), with the payer key in EVM_PRIVATE_KEY. Its default RPC endpoint is Base's public https://sepolia.base.org, overridable with --rpc-url. Any other network gets the read-only checks only.