> ## Documentation Index
> Fetch the complete documentation index at: https://doc.lucidworks.com/llms.txt
> Use this file to discover all available pages before exploring further.

# OAuth 2.0 Protected Resource Metadata (RFC 9728)

> Get protected resource metadata for Model Context Protocol (MCP) client discovery. Implements RFC 9728.



## OpenAPI

````yaml /api-reference/5.18/fusion-api-api-docs.json get /.well-known/oauth-protected-resource
openapi: 3.0.1
info:
  title: Fusion Proxy API
  description: Manage Fusion users, roles, realms, access tokens, and API keys.
  contact:
    name: Lucidworks
    url: www.lucidworks.com
    email: support@lucidworks.com
  license:
    name: License of API
    url: https://lucidworks.com/legal/developer-license-agreement/
  version: '5.9'
servers:
  - url: https://{FUSION HOST}/api
    description: Fusion
    variables:
      FUSION HOST:
        default: FUSION_HOST
        description: Your environment host.
security: []
tags:
  - name: Realm management
    description: >-
      Endpoints for creating, configuring, and managing authentication realms
      such as LDAP, SAML, OIDC, and others.
  - name: User management
    description: >-
      Endpoints for creating, updating, deleting, and retrieving Fusion users
      and their associated metadata.
  - name: Suggestions
    description: >-
      Endpoints that provide query suggestions or autocomplete results to
      improve search experiences.
  - name: API key management
    description: >-
      Endpoints for managing API keys used to authenticate Fusion services and
      integrations.
  - name: OAuth 2.0
    description: >-
      Endpoints that support OAuth 2.0 authentication, including token issuance,
      validation, and client registration.
  - name: OAuth 2.1 Well-Known
    description: >-
      OAuth 2.1 discovery endpoints that return server metadata and
      configuration. The `.well-known` URI prefix is a standard defined in RFC
      8615 for automatic service discovery.
  - name: Role management
    description: >-
      Endpoints for creating and managing user roles and their associated
      permissions within Fusion.
  - name: System status
    description: >-
      Endpoints for retrieving basic system health, configuration, and
      authentication status.
externalDocs:
  description: Lucidworks Documentation
  url: https://doc.lucidworks.com/
paths:
  /.well-known/oauth-protected-resource:
    get:
      tags:
        - OAuth 2.1 Well-Known
      summary: OAuth 2.0 Protected Resource Metadata (RFC 9728)
      description: >-
        Get protected resource metadata for Model Context Protocol (MCP) client
        discovery. Implements RFC 9728.
      operationId: getProtectedResourceMetadata
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: 2eb83d88-09b0-4ab9-b855-f0d9054a9ae9

````