Avery SDKThe best Agent Payment SDK for the AI Agent era

Turn paid x402 endpoints into safe, capped, model-callable tools for server-side AI agents.

Agent-native tools

Wrap paid endpoints with x402tool() as Vercel AI SDK-compatible tools that models can call.

Use X402Client to sign, pay, and retry HTTP calls against x402-protected resources.

Bound agent payment exposure with maxAmount at the client, call, or tool level.

Keep EVM and Solana private keys, RPC URLs, and payment signing on the server.