CHLOM License Exchange (LEX) — API & Integration Specification (Phase 3→4)

Owner: CrownThrive, LLC Date: 2025-08-08 Classification: Internal — Decentralized Licensing Marketplace API, Integration, and Interoperability Framework

1. Purpose

This specification defines the complete API architecture, integration protocols, and interoperability standards for the LEX platform. It ensures secure, scalable, and standards-compliant communication between LEX components, third-party systems, AI/ML services, and DAO governance modules.

2. API Architecture

  • Primary Protocol: REST + gRPC hybrid model for optimized performance.
  • Base URL:
  • Versioning: Semantic versioning (
  • Transport Security: TLS 1.3 with mTLS for all privileged endpoints.

3. Endpoint Categories

  1. Licensing Operations
  2. Compliance & Verification
  3. Marketplace Data
  4. AI/ML & Fraud Detection
  5. DAO Governance

4. Authentication & Authorization

  • Auth Method: OAuth2.0 with JWT tokens, scopes for granular permissions.
  • mTLS: Required for regulated actors (issuers, regulators).
  • Role-Based Access Control: Roles include

5. Data Formats & Standards

  • Interoperability: JSON-LD with IPFS CIDs for immutable references.
  • Proof Format: zk-SNARK/zk-STARK proof objects with Merkle inclusion proofs.
  • Event Streaming: Server-Sent Events (SSE) and WebSocket for real-time updates.

6. Integration Patterns

  • Webhook Callbacks: For compliance results, fraud alerts, and governance outcomes.
  • gRPC Services: For high-throughput fraud detection and AI/ML inference calls.
  • SDKs: Rust, Python, and TypeScript SDKs for developers.

7. Security Controls

  • Rate Limiting: Adaptive based on user role and reputation score.
  • Replay Protection: Nonce + timestamp validation.
  • Audit Logging: Immutable logs stored in Arweave.

8. Developer Build Notes

  • Gateway: Kong or Envoy for API routing, integrated with OAuth2 provider.
  • Monitoring: Prometheus metrics, Grafana dashboards for API health.
  • Testing: Postman collection for REST, gRPC test harness for service validation.
  • CI/CD: GitHub Actions with automated schema validation and contract testing.

This API & Integration specification ensures LEX functions as a fully interoperable, secure, and developer-friendly platform, enabling cross-industry adoption and smooth integration with compliance, fraud detection, and DAO governance modules.

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