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Sponge Wallet is a wallet for AI agents. It enables you to store stablecoins, issue virtual cards, accept ACH/wires, perform trades and call x402/MPP endpoints. 
npx spongewallet init

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Agents can

  • create their own wallets
  • pay for x402 and MPP API endpoints
  • issue virtual cards or store a human’s card
  • receive and send ACH/wire transfers.
  • accept payments.
  • trade on Hyperliquid and Polymarket.

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Choose your path

MCP

Connect an agent framework to Sponge wallet tools with a remote MCP server.

CLI

Initialize an agent, claim it later, inspect balances, transfer funds, and print MCP config from the terminal.

SDK

Build with @paysponge/sdk or paysponge using wallet and platform clients.
https://mintcdn.com/sponge-f5c885b4/VF1R3WE1Q8n76rSe/images/icons/claude-blue.svg?fit=max&auto=format&n=VF1R3WE1Q8n76rSe&q=85&s=06b66767f85cc060349d2d8030e4ae1f

Claude Agent SDK

Give Claude Agent SDK the full Sponge wallet toolset through MCP.
https://mintcdn.com/sponge-f5c885b4/VF1R3WE1Q8n76rSe/images/icons/vercel-blue.svg?fit=max&auto=format&n=VF1R3WE1Q8n76rSe&q=85&s=c3273dac84ae69a2b95ff70942266673

Vercel AI SDK

Wrap Sponge wallet calls as Vercel AI SDK tools with your own policy checks.
https://mintcdn.com/sponge-f5c885b4/VF1R3WE1Q8n76rSe/images/icons/openai-blue.svg?fit=max&auto=format&n=VF1R3WE1Q8n76rSe&q=85&s=d9e998f6c27f6e309f81cbe4d26cf70e

OpenAI Agents SDK

Use OpenAI Agents SDK function tools around SpongeWallet actions.

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Supported networks

EthereumEthereum
BaseBase
TempoTempo
SolanaSolana

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Supported markets

HyperliquidHyperliquid
PolymarketPolymarket

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Also building paid APIs?

Use Sponge Gateway to turn an upstream API into paid x402 and MPP endpoints with dashboard and MCP workflows.