Pay.sh uses the x402 protocol — Coinbase's open AI-payments standard — as its gateway, and is compatible with a similar solution called the Machine Payments Protocol (MPP), developed by Tempo and Stripe.

Users can link their Solana wallets to a range of platforms, including Google Gemini and public systems such as Openclaw, and top up their balance via credit card or stablecoins.

From there, agents — operating under human supervision or fully autonomously — can browse an API marketplace and access services without creating an account or signing up for a subscription.

How It Works

Pay.sh is a protocol built for bots. An API proxy is deployed on Google Cloud Platform (GCP), sitting between the AI agent and Google Cloud's backend services: BigQuery for data analysis, Gemini for LLM calls, and Cloud Run for containerized applications.

The proxy authenticates and modifies the agent's request before forwarding it to GCP, and adds payment handling via x402 or MPP.

"Your agent's Solana wallet serves as its identifier. That removes the need to create a Google account or manage rotating credentials. No subscriptions, no minimum spend. The agent pays for exactly what it uses," the announcement reads.

Beyond Google Cloud's official APIs, more than 50 community providers will plug into Pay.sh — including communication platforms, online stores, blockchain infrastructure providers Helius and Alchemy, and data services Dune Analytics and Nansen.

Agents can query up to five sources per request and pay "fractions of a cent per call," allowing them to pick the best offer and avoid lock-in to a single provider.