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AgentCash gives agents instant access to hundreds of premium APIs through a single USDC balance, with no per-provider accounts or API keys. Because it speaks both x402 and MPP, an AgentCash-equipped agent can pay any Proceeds paywall and let the 402 challenge decide which standard to use. Use AgentCash when you want the broadest reach from one wallet — your agent can both discover marketplace services and pay a Proceeds URL you already have.

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Install

AgentCash works in Claude Code, Cursor, Codex, and other clients. Pick the mode that fits your workflow: 
npx agentcash onboard
Onboarding creates and funds the shared USDC balance your agent draws from.

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Pay a Proceeds endpoint

Hand your agent the paywall URL and ask it to call the endpoint. AgentCash handles the 402 challenge, signs the payment from your balance, and retries. 
# x402
https://myproceeds.xyz/api/x402/pay/{serviceId}/{slug}

# MPP (Tempo-enabled paywalls only)
https://myproceeds.xyz/api/mpp/pay/{serviceId}/{slug}
A prompt to your agent can be as simple as: 
Call https://myproceeds.xyz/api/x402/pay/{serviceId}/{slug} and pay for it with AgentCash.
Return the JSON response.
The agent reads the challenge, picks a supported standard, pays, and returns the upstream response.

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Confirm the payment

Watch the matching transaction move from Pending to Completed in Transactions, and trace Request → Payment → Fulfillment in Events.

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When to use AgentCash

  • You want one balance that works across many providers, not just Proceeds.
  • You want the agent to choose between x402 and MPP based on the challenge.
  • You don’t want to manage per-provider API keys or subscriptions.

AgentCash docs

Onboarding, skills, and the full service catalog.

Agents overview

Compare AgentCash with Circle Agent Stack and Tempo Wallet.

x402 standard

The request flow AgentCash uses for x402 paywalls.

MPP standard

The machine-to-machine flow for Tempo-enabled paywalls.