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Generate tools automatically from an OpenAPI spec at runtime. Overview
  • Attach the OpenAPI adapter to an app; it fetches the spec and exposes operations as tools.
  • Input schema is derived from operation parameters/body via JSON Schema → Zod conversion.
Steps
  1. Add the adapter to your app with a URL to the OpenAPI JSON.
  2. Optionally configure include/exclude (future), naming, and dereference behavior.
Example (pseudocode) 
import OpenapiAdapter from '@frontmcp/adapters/openapi'

@App({
  id: 'expense-2',
  name: 'Expense MCP 2',
  adapters: [
    OpenapiAdapter.init({
      name: 'mock-expense-server',
      url: 'https://example.com/openapi.json',
    })
  ],
})
export default class ExpenseMcpApp {}
Notes
  • Adapter-generated tools inherit plugins and providers defined on the app.
  • At runtime, each generated tool validates inputs using derived schemas.
  • See the expenses example for a working setup.