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CONTRIBUTING.md		CONTRIBUTING.md
README.md		README.md
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README.md

x402 Typescript SDK

This folder contains Typescript packages to help developers implement the x402 protocol in their front-end and back-end applications.

Package	Description	Latest version
`@bankofai/x402-core`	Transport-agnostic client, server, and facilitator components.
`@bankofai/x402-extensions`	Additional functionality built on top of x402 (Bazaar, Sign-in-with-x).
`@bankofai/x402-mcp`	MCP server integration for x402.

HTTP integrations

Package	Description	Latest version
`@bankofai/x402-axios`	Axios interceptor for x402 payment flows.
`@bankofai/x402-express`	Express middleware for x402-protected routes.
`@bankofai/x402-fastify`	Fastify middleware for x402-protected routes.
`@bankofai/x402-fetch`	Fetch wrapper for x402 payment handling.
`@bankofai/x402-hono`	Hono middleware for x402 integrations.
`@bankofai/x402-next`	Next.js integration for x402.

Chains implementations

Package	Description	Latest version
EVM - `@bankofai/x402-evm`	EVM implementation of x402 using the Exact payment scheme.
TRON - `@bankofai/x402-tron`	TRON implementation of x402 (exact, permit, GasFree, batch-settlement).