PrivateGPT Headless is an API-based tool that detects and removes personally identifiable information (PII) from data before it is sent to large language models (LLMs) such as ChatGPT/OpenAI. It operates as a containerized service deployed within the customer's own environment, meaning no data is shared with Private AI. The tool sits between an application and an LLM API call, de-identifying outgoing data and re-identifying the LLM's response — returning contextually accurate output to the end user without ever exposing PII externally. Integration requires only a few lines of code around each LLM API call. Key capabilities include: - Detection and removal of 50+ PII entity types (e.g., names, locations, religion, financial data) - Support for 52 languages - De-identified embeddings to prevent data leaks - Advanced re-identification to restore PII in LLM responses - Real-time processing with no perceptible latency for users - Compliance support for regulations including GDPR, CPRA, HIPAA, and PCI DSS - A reporting dashboard showing volume and types of PII detected The product is aimed at enterprise developers and teams building LLM-powered applications (e.g., summarization tools, chatbots) who need to prevent sensitive data from being transmitted to third-party AI providers. A UI version (PrivateGPT) and a web demo are also available alongside the headless API offering.