iGPT is an email intelligence API that converts unstructured email threads and attachments into structured, reasoning-ready JSON for developers building AI agents, workflow automation, and business applications. The platform connects to email providers such as Gmail and Microsoft Outlook, indexes full thread and attachment history, and returns structured data through a single API endpoint. When you send a natural language query or automated trigger, iGPT processes context across entire email histories and returns extracted entities, relationships, action items, decision timelines, and sentiment signals with source citations traced back to the original messages. iGPT is built on a proprietary Context Engine Framework (CEF) that handles the full pipeline from indexing to inference: Deep Indexing: Multi-layer semantic, structural, and metadata indexing designed for agent-grade reasoning and high-precision retrieval. Advanced Document Extraction: Asynchronous parsing, normalization, and entity enrichment during indexing to maximize inference quality and grounding. Intent Classification: Transforms natural language into structured retrieval actions, enabling precise filters, weighting, and query orchestration. Smart Hybrid Retrieval: Combines deep semantic search, full-text precision, and structured filtering with dynamic ranking for optimal relevance. Inference Context Building: Reformats and compresses raw search results into structured, LLM-optimized context blocks for coherent, grounded responses. iGPT is designed for programmatic, multi-tenant access. Unlike personal email assistants that serve one user at a time, iGPT allows any application to query any connected user's email with full tenant isolation, making it suitable for organization-wide deployments across CRM enrichment, customer support automation, compliance auditing, and project management. The platform supports native integration with LangChain, LlamaIndex, CrewAI, n8n, and MCP-compatible agent frameworks, and provides Python and JavaScript/TypeScript SDKs. Deployment options include cloud-hosted, hybrid, and on-premises configurations. Security features include OAuth and RBAC access controls, zero data retention processing, and SOC 2 and GDPR compliance. iGPT serves developers and engineering teams at SaaS companies, AI startups, and enterprises who need to add email understanding to their applications without building custom parsing, threading, or context engineering infrastructure from scratch.