DMSI Advanced API — Full Feature List

Enterprise-grade authentication, GraphQL, native SDKs, interactive documentation, and usage analytics. Below is the complete feature set across all six capability areas.

OAuth 2.0 and JWT

Advanced API adds proper OAuth 2.0 infrastructure to DMSI DDLS, supporting every major authentication pattern used in modern integrations.

Authorization Code flow — For third-party application access with PKCE support
Client Credentials flow — Server-to-server integrations without a user context
JWT Bearer token authentication — Stateless authentication for high-performance API calls
Scoped access tokens — Four built-in scopes: read-only, license management, customer management, and full access
Token expiry configuration — Set access token lifetime per OAuth client
Refresh token support — Obtain new access tokens without user re-authentication
OAuth client management dashboard — Register clients, rotate secrets, view tokens, and revoke access

GraphQL Support

A full GraphQL endpoint alongside the existing REST API, for efficient data querying from complex integrations and custom portals.

GraphQL endpoint — Available at /wp-json/dmsi/v2/graphql with OAuth 2.0 or API key auth
Query exactly what you need — Request only the fields your application uses
Introspection support — Full schema introspection for IDE tooling
Supported types — License, Customer, Product, Order, Subscription, Activation, and Download
Real-time subscription queries — WebSocket-based subscriptions for live dashboards
GraphQL playground in admin — Browser-based playground for developing and testing queries

Client SDKs

All three official client SDKs are included with your Advanced API license. No additional purchase required.

PHP SDK — Composer package: dmsi/ddls-php-sdk
Node.js SDK — npm package: @dmsi/ddls-sdk
Python SDK — PyPI package: dmsi-ddls
SDK methods mirror API endpoints — Methods like license.activate() map directly to REST endpoints
Built-in reliability features — Error handling, retry logic, and cursor-based pagination
Both authentication methods supported — OAuth 2.0 access token or DMSI DDLS API key
SDK download links — Available in your customer portal alongside the plugin ZIP

Interactive API Documentation

Documentation generated live from your DMSI DDLS instance — always accurate and always up to date.

Swagger/OpenAPI 3.0 specification — Generated automatically from your running instance
Swagger UI — Browse every endpoint with parameters, request body schema, and response format
“Try it” on every endpoint — Test API calls directly from the browser documentation
API key and OAuth support in Swagger UI — Switch between auth methods in the Authorize dialog
OpenAPI spec export — Download as JSON or YAML for Postman, Insomnia, or any API gateway

API Usage Analytics

Understand how your API is being consumed and enforce usage limits per client.

Per-client call volume dashboard — API call counts by OAuth client and time period
Rate limiting per client — Configure max calls per minute, hour, and day per client
Rate limit response headers — X-RateLimit-Limit, Remaining, and Reset on every response
Top endpoints by call volume — Identify which endpoints integrations rely on most
Error rate by client and endpoint — Monitor 4xx/5xx rates to detect issues

White-Label Support

Build customer-facing portals with your own domain and branding, powered by DMSI DDLS data via Advanced API.

Custom portal domain — Serve your portal from your own domain, no DMSI.gr URLs visible
Full branding control — Configure logo, colours, and typography via CSS custom properties
OAuth-powered data layer — Your portal authenticates via OAuth 2.0
Open-source portal templates — Ready-to-customise templates on GitHub under MIT licence
No DMSI branding in output — Customer-facing pages contain no DMSI references

Advanced API is available individually or as part of the All Access Bundle — all 8 extensions for €449/yr.