Sponge Sponge is the financial infrastructure for the agent economy. Master keys create and manage agent wallets; scoped agent keys execute wallet actions — transfers, swaps, card issuance, x402/MPP payments, Hyperliquid/Polymarket trades. Official docs: --- When to Use Use this skill when you need to: - Provision a new agent wallet from a master account - List, inspect, or rotate the agent keys in a Sponge platform - Move funds between Sponge wallets or onto external addresses - Issue or fetch a Sponge Card / virtual card for an agent - Pay an x402- or MPP-enabled endpoint on behalf of an ag…