> ## Documentation Index > Fetch the complete documentation index at: https://docs.tensorpro.ai/llms.txt > Use this file to discover all available pages before exploring further. # Introduction > Provenance-aware external memory middleware for LLM systems, built by TensorPRO. ## What EDN is EDN is provenance-aware external memory middleware for LLM systems, built by TensorPRO. It provides structured persistence, typed correction channels, and deterministic retrieval for the context your application feeds to a language model. You bring your own LLM. EDN never supplies a model and never routes requests to one. It sits alongside your stack as a memory layer: you write records into it, correct them through typed channels, and retrieve provenance-aware context on demand. What you do with that context, and which model you send it to, is entirely up to you. ## Base URL ``` https://api.tensorpro.ai ``` This base URL is the EDN evaluation endpoint. It is intended for evaluation and testing. Do not describe it or rely on it as a production endpoint. ## How to read these docs Mint an API key and make your first authenticated call. How EDN authenticates requests with an API key. Every endpoint, grouped by resource, with an interactive playground. Create and manage the API keys used to call EDN.