x402

Axios is a promise-based HTTP client for browser and Node.js applications. It creates API instances and sends requests such as authentication, session, logout, and project operations. Its interceptor system can modify request, response, and error handling, and it includes TypeScript support.

Enable Banking is an open-banking infrastructure platform that provides a single PSD2-compliant API for connecting products to more than 2,700 banks across 30 European countries. It supports real-time account information and payment initiation for business and personal accounts, while handling bank-specific APIs, authentication methods, API updates, and regulatory changes. The platform provides documentation, sandbox environments, and engineering support.

**Stripe** is a financial technology company that provides online payment processing software and APIs for businesses of all sizes. Founded in 2010 by Irish brothers Patrick and John Collison, it lets companies accept payments, manage subscriptions and billing, handle tax compliance, prevent fraud, and access treasury and banking tools. Headquartered in South San Francisco and Dublin, it remains privately held.

Cloudflare is an internet infrastructure and security platform that provides hosting and delivery infrastructure for applications, agents, websites, and data. Its network combines compute, connectivity, and security at edge locations, with Workers running code close to users and backend data; the company states that its network operates in more than 335 cities and reaches 95% of the world's Internet-connected population within 50 milliseconds. Cloudflare also provides AI crawler controls that let site owners inspect, allow, or block crawler activity, along with pay-per-crawl and a monetization gateway for pages, data sets, APIs, MCP tool calls, files, and search indexes. The described x402 flow uses an HTTP 402 response to request payment, after which an agent pays, retries with proof, and Cloudflare verifies the payment at the edge.

OpenSend is a self-hosted transactional and marketing email platform built on Amazon SES for sending transactional mail, newsletters, and campaigns. It provides a dashboard, a TypeScript SDK distributed as the `opensend-js` npm package, and an MCP server over one public API; the video also describes send simulation and delivery-status logs. The project supports Docker or Cloudflare deployment, uses Google-only sign-in, keeps API-secret setup out of the browser, and recommends starting with simulated sending before provisioning infrastructure or sending real email.