Adopt WebMCP
Choose a runtime and expose application behavior to agents.Choose a runtime
Choose native WebMCP, the tool-only polyfill, or the full
@mcp-b/global runtime.Add tools to an existing app
Expose existing application functions as WebMCP tools.
Use schemas and structured output
Add input schemas, output schemas, and typed results to MCP-B tools.
Register prompts and resources
Expose prompts and resources through the MCP-B extension API.
Integrate a framework
Integrate with a framework
Register tools through the lifecycle patterns used by your frontend framework.
Connect and verify tools
Bridge tools across contexts, diagnose failures, and test runtime behavior.Connect desktop agents with the local relay
Bridge browser tools to desktop MCP clients.
Bridge tools across iframes
Expose tools from an embedded iframe to its parent page.
Debug and troubleshoot
Diagnose registration, transport, and execution failures.
Test native and polyfill runtimes
Run the same checks against native and polyfilled implementations.