SSO MCP Server

# API Design Specification ## API: [API Name] **Version**: [1.0.0] **Prepared By**: [Architect Name] **Date Created**: [YYYY-MM-DD] **Last Updated**: [YYYY-MM-DD] **Base URL**: `https://api.example.com/v1` --- ## 1. Overview ### 1.1 Purpose [Describe the purpose of this API and what it enables consumers to do] ### 1.2 Intended Audience * **Internal Developers**: [How they will use the API] * **External Partners**: [Integration scenarios] * **Third-party Developers**: [Public API use cases] ### 1.3 API Style * **Style**: REST / GraphQL / gRPC / WebSocket * **Protocol**: HTTPS * **Data Format**: JSON / Protocol Buffers / XML --- ## 2. API Design Principles ### 2.1 Design Guidelines * **RESTful Conventions**: Follow REST principles (resources, HTTP verbs, status codes) * **Resource-Oriented**: Design around resources, not actions * **Consistency**: Consistent naming, structure, and behavior across endpoints * **Versioning**: Support multiple API versions for backward compatibility * **Idempotency**: GET, PUT, DELETE operations must be idempotent * **Error Handling**: Consistent error response format * **Security First**: All endpoints require authentication unless explicitly public ### 2.2 Naming Conventions **Resource Names**: * Use plural nouns: `/users`, `/orders`, `/products` * Use kebab-case for multi-word resources: `/order-items`, `/user-preferences` * Avoid verbs in URLs (use HTTP methods instead) **Query Parameters**: * Use camelCase: `?sortBy=createdAt&pageSize=20` **JSON Properties**: * Use camelCase: `{"firstName": "John", "createdAt": "2025-01-01T00:00:00Z"}` --- ## 3. Authentication & Authorization ### 3.1 Authentication Method **Method**: OAuth 2.0 with JWT tokens / API Key / Basic Auth **Token Format**: ``` Authorization: Bearer <JWT_TOKEN> ``` **Token Acquisition**: ```http POST /auth/token Content-Type: application/json { "username": "user@example.com", "password": "SecurePassword123" } Response: { "accessToken": "eyJhbGciOiJIUzI1NiIs...", "refreshToken": "dGhpc2lzYXJlZnJlc2h0b2tlbg==", "expiresIn": 3600, "tokenType": "Bearer" } ``` ### 3.2 Authorization Model **Model**: Role-Based Access Control (RBAC) **Roles**: * **Admin**: Full access to all resources * **User**: Access to own resources and public data * **Guest**: Read-only access to public resources **Permission Format**: ```json { "userId": "12345", "roles": ["user"], "permissions": ["read:users", "write:own-profile"] } ``` --- ## 4. API Endpoints ### 4.1 Resource: Users #### GET /users **Description**: Retrieve a list of users **Authentication**: Required (Admin only) **Rate Limit**: 100 requests per minute **Request Parameters**: | Parameter | Type | Required | Description | Default | | :--- | :--- | :---: | :--- | :--- | | `page` | integer | No | Page number (1-indexed) | 1 | | `pageSize` | integer | No | Number of items per page (max 100) | 20 | | `sortBy` | string | No | Field to sort by (createdAt, name, email) | createdAt | | `sortOrder` | string | No | Sort direction (asc, desc) | desc | | `status` | string | No | Filter by status (active, inactive, pending) | - | | `search` | string | No | Search in name or email | - | **Request Example**: ```http GET /users?page=1&pageSize=20&sortBy=createdAt&sortOrder=desc&status=active Authorization: Bearer <JWT_TOKEN> ``` **Response (200 OK)**: ```json { "data": [ { "id": "user-123", "email": "john.doe@example.com", "firstName": "John", "lastName": "Doe", "status": "active", "roles": ["user"], "createdAt": "2025-01-01T00:00:00Z", "updatedAt": "2025-01-15T10:30:00Z" } ], "pagination": { "page": 1, "pageSize": 20, "totalItems": 150, "totalPages": 8 }, "links": { "self": "/users?page=1&pageSize=20", "next": "/users?page=2&pageSize=20", "last": "/users?page=8&pageSize=20" } } ``` **Error Responses**: * `401 Unauthorized`: Missing or invalid authentication token * `403 Forbidden`: User lacks admin role * `429 Too Many Requests`: Rate limit exceeded --- #### GET /users/{userId} **Description**: Retrieve a specific user by ID **Authentication**: Required **Rate Limit**: 100 requests per minute **Path Parameters**: | Parameter | Type | Description | | :--- | :--- | :--- | | `userId` | string | Unique identifier of the user | **Request Example**: ```http GET /users/user-123 Authorization: Bearer <JWT_TOKEN> ``` **Response (200 OK)**: ```json { "id": "user-123", "email": "john.doe@example.com", "firstName": "John", "lastName": "Doe", "status": "active", "roles": ["user"], "profile": { "bio": "Software engineer", "avatarUrl": "https://cdn.example.com/avatars/user-123.jpg", "location": "San Francisco, CA" }, "createdAt": "2025-01-01T00:00:00Z", "updatedAt": "2025-01-15T10:30:00Z" } ``` **Error Responses**: * `401 Unauthorized`: Missing or invalid authentication token * `403 Forbidden`: User can only access own profile * `404 Not Found`: User not found --- #### POST /users **Description**: Create a new user **Authentication**: Required (Admin only) **Rate Limit**: 20 requests per minute **Request Body**: ```json { "email": "jane.smith@example.com", "firstName": "Jane", "lastName": "Smith", "password": "SecurePassword123!", "roles": ["user"] } ``` **Validation Rules**: * `email`: Valid email format, unique * `firstName`: 1-50 characters, required * `lastName`: 1-50 characters, required * `password`: Min 8 characters, must contain uppercase, lowercase, number, special char * `roles`: Array of valid role names **Response (201 Created)**: ```json { "id": "user-456", "email": "jane.smith@example.com", "firstName": "Jane", "lastName": "Smith", "status": "active", "roles": ["user"], "createdAt": "2025-01-20T14:22:00Z", "updatedAt": "2025-01-20T14:22:00Z" } ``` **Error Responses**: * `400 Bad Request`: Invalid request body or validation failure * `401 Unauthorized`: Missing or invalid authentication token * `403 Forbidden`: User lacks admin role * `409 Conflict`: Email already exists --- #### PUT /users/{userId} **Description**: Update an existing user **Authentication**: Required **Idempotency**: Idempotent **Rate Limit**: 20 requests per minute **Request Body**: ```json { "firstName": "Jane", "lastName": "Doe-Smith", "profile": { "bio": "Updated bio", "location": "New York, NY" } } ``` **Response (200 OK)**: [Same structure as GET /users/{userId}] **Error Responses**: * `400 Bad Request`: Invalid request body * `401 Unauthorized`: Missing or invalid token * `403 Forbidden`: User can only update own profile * `404 Not Found`: User not found --- #### DELETE /users/{userId} **Description**: Delete a user (soft delete) **Authentication**: Required (Admin only) **Idempotency**: Idempotent **Rate Limit**: 10 requests per minute **Response (204 No Content)**: [Empty response body] **Error Responses**: * `401 Unauthorized`: Missing or invalid token * `403 Forbidden`: User lacks admin role * `404 Not Found`: User not found --- ### 4.2 Resource: [Another Resource] [Repeat the structure above for each major resource] --- ## 5. Common Patterns ### 5.1 Pagination All list endpoints support cursor-based or offset-based pagination. **Offset-based** (Simple, stateless): ``` GET /users?page=2&pageSize=20 ``` **Cursor-based** (Efficient for large datasets): ``` GET /users?cursor=eyJpZCI6MTIzfQ==&limit=20 ``` **Response includes**: ```json { "data": [...], "pagination": { "cursor": "nextCursorValue", "hasMore": true } } ``` ### 5.2 Filtering Use query parameters for filtering: ``` GET /orders?status=pending&createdAfter=2025-01-01&minAmount=100 ``` ### 5.3 Sorting Use `sortBy` and `sortOrder` parameters: ``` GET /products?sortBy=price&sortOrder=asc ``` ### 5.4 Field Selection (Sparse Fieldsets) Clients can request specific fields: ``` GET /users/123?fields=id,email,firstName ``` ### 5.5 Expanding Related Resources Use `expand` parameter to include related resources: ``` GET /orders/456?expand=customer,items ``` --- ## 6. HTTP Status Codes ### 6.1 Success Codes | Code | Status | Usage | | :--- | :--- | :--- | | 200 | OK | Successful GET, PUT, PATCH requests | | 201 | Created | Successful POST request that creates a resource | | 204 | No Content | Successful DELETE request | ### 6.2 Client Error Codes | Code | Status | Usage | | :--- | :--- | :--- | | 400 | Bad Request | Invalid request body, validation failure | | 401 | Unauthorized | Missing or invalid authentication | | 403 | Forbidden | Authenticated but lacks permission | | 404 | Not Found | Resource does not exist | | 409 | Conflict | Resource conflict (e.g., duplicate email) | | 422 | Unprocessable Entity | Validation errors | | 429 | Too Many Requests | Rate limit exceeded | ### 6.3 Server Error Codes | Code | Status | Usage | | :--- | :--- | :--- | | 500 | Internal Server Error | Unexpected server error | | 502 | Bad Gateway | Upstream service failure | | 503 | Service Unavailable | Service temporarily down | | 504 | Gateway Timeout | Upstream service timeout | --- ## 7. Error Response Format All error responses follow a consistent structure: ```json { "error": { "code": "VALIDATION_ERROR", "message": "The request contains invalid data", "details": [ { "field": "email", "message": "Email is already registered", "code": "DUPLICATE_EMAIL" } ], "requestId": "req-abc123", "timestamp": "2025-01-20T14:30:00Z" } } ``` **Error Code Categories**: * `VALIDATION_ERROR`: Input validation failure * `AUTHENTICATION_ERROR`: Auth token missing or invalid * `AUTHORIZATION_ERROR`: Insufficient permissions * `NOT_FOUND`: Resource not found * `CONFLICT`: Resource conflict * `RATE_LIMIT_EXCEEDED`: Too many requests * `INTERNAL_ERROR`: Server error --- ## 8. Rate Limiting ### 8.1 Rate Limit Policy * **Standard Users**: 100 requests per minute * **Premium Users**: 1000 requests per minute * **Admin Users**: 5000 requests per minute ### 8.2 Rate Limit Headers All responses include rate limit information: ```http X-RateLimit-Limit: 100 X-RateLimit-Remaining: 95 X-RateLimit-Reset: 1642684800 ``` ### 8.3 Rate Limit Exceeded Response ```http HTTP/1.1 429 Too Many Requests Retry-After: 60 { "error": { "code": "RATE_LIMIT_EXCEEDED", "message": "Too many requests. Please try again later.", "retryAfter": 60 } } ``` --- ## 9. Versioning ### 9.1 Versioning Strategy **Method**: URL-based versioning (e.g., `/v1/users`, `/v2/users`) **Version Lifecycle**: * **Current**: v1 (Stable, fully supported) * **Deprecated**: v0 (Supported until 2025-12-31) * **Beta**: v2 (Preview, subject to breaking changes) ### 9.2 Deprecation Policy * Deprecation announced 6 months in advance * Deprecated versions supported for 12 months * Sunset date communicated via API response headers: ```http Sunset: Sat, 31 Dec 2025 23:59:59 GMT Deprecation: Mon, 01 Jul 2025 00:00:00 GMT ``` --- ## 10. Security ### 10.1 Security Headers All responses include security headers: ```http Strict-Transport-Security: max-age=31536000; includeSubDomains X-Content-Type-Options: nosniff X-Frame-Options: DENY Content-Security-Policy: default-src 'self' ``` ### 10.2 Input Validation * All inputs are validated and sanitized * SQL injection prevention via parameterized queries * XSS prevention via output encoding * CSRF protection for state-changing operations ### 10.3 Data Protection * All data encrypted in transit (TLS 1.3) * Sensitive data encrypted at rest (AES-256) * PII masked in logs and monitoring * GDPR compliance (data export, right to be forgotten) --- ## 11. Testing ### 11.1 Test Environments * **Development**: `https://dev-api.example.com` * **Staging**: `https://staging-api.example.com` * **Production**: `https://api.example.com` ### 11.2 Test Credentials Contact [email] for test account credentials. ### 11.3 Sandbox Mode Use `X-Sandbox-Mode: true` header to interact with test data without affecting production. --- ## 12. API Documentation ### 12.1 Interactive Documentation * **Swagger UI**: `https://api.example.com/docs` * **OpenAPI Spec**: `https://api.example.com/openapi.json` ### 12.2 Code Examples Code examples available in multiple languages: * cURL * JavaScript (Node.js) * Python * Java * C# --- ## 13. Support & Feedback ### 13.1 Support Channels * **Email**: <api-support@example.com> * **Developer Portal**: <https://developers.example.com> * **Status Page**: <https://status.example.com> ### 13.2 Changelog * **Changelog**: <https://developers.example.com/changelog> * **API Updates**: Subscribe to email notifications --- ## 14. Appendices ### Appendix A: Complete OpenAPI Specification [Link to full OpenAPI/Swagger YAML file] ### Appendix B: Postman Collection [Link to Postman collection for testing] ### Appendix C: Rate Limit Algorithms [Technical details on rate limiting implementation] ### Appendix D: Webhook Documentation [If webhooks are supported, document event types and payload formats] --- ## 15. Revision History | Version | Date | Author | Changes | | :--- | :--- | :--- | :--- | | 1.0 | YYYY-MM-DD | [Name] | Initial API specification | | 1.1 | YYYY-MM-DD | [Name] | Added pagination support |