valeo-cash

Use whenever the user wants to add payments to an API, monetize endpoints, implement x402, handle HTTP 402 responses, create paid APIs, set up crypto paywalls, accept USDC, or build agent payments. Trigger on: x402, 402 Payment Required, paid API, paywall, micropayments, USDC payments, agent payments, monetize API, payment middleware, x402-next, x402-express, x402-fetch, Sentinel, payment router, audit trail, budget caps, payment receipts, facilitator. Also trigger when turning a free API into paid, adding per-request pricing, or building AI agent autonomous payment flows. Covers Base (EVM), Solana, and Stellar with USDC. Trigger on: Stellar, Soroban, Freighter, OpenZeppelin, OZ Channels, auth-entry, SEP-41, fee bump, smart accounts, fee-free. Even without "x402" mentioned — if they want to charge for API access with crypto or build agent payment infrastructure, this skill applies.