AI & Agent Protocols

Open standard for communication and task delegation between independent AI agents across different frameworks and vendors. Agents discover each other via Agent Cards, delegate tasks over JSON-RPC 2.0, and track task state through a defined lifecycle.

Specification for a Markdown file published at /auth.md on any service that tells AI agents how to register, which authentication flows are supported, and what credentials they can request. Enables agents to onboard to services without human interaction.

Open standard for connecting LLM applications to external tools, data sources, and prompt templates. Defines how AI hosts communicate with MCP servers over JSON-RPC 2.0.

HTTP-native payment protocol that revives the 402 Payment Required status code to enable programmatic stablecoin payments over standard HTTP. Clients attach signed USDC payment payloads to requests; servers verify via a facilitator and return the paid resource.