Val Town promotes OAuth Dynamic Client Registration to solve app-to-app connections

Val Town, a vibe coding platform, describes how it adopted Dynamic Client Registration (DCR), a little-known OAuth extension built into the MCP spec by Anthropic and OpenAI, to let apps automatically register as OAuth clients without manual developer portal work. Using this, Val Town built its MCP server so Claude and ChatGPT can authenticate into user accounts, and created a library called std/oauth that lets any app add 'Login with Val Town' in just two lines of code.