Add Verifiable Identity to Any LangChain Agent in 10 Lines LangChain agents are powerful but anonymous. Every time you restart your agent, it starts from zero — no persistent identity, no verifiable history, no way for other agents to know if it can be trusted. This tutorial shows how to give any LangChain agent a W3C DID (Decentralized Identifier) and portable reputation using AURA Open Protocol. Install pip install langchain langchain-openai requests Enter fullscreen mode Exit fullscreen mode No blockchain SDKs. No wallet. Just requests . Step 1: Register Your Agent import requests AURA_API = " https://api.auraopenprotocol.org/v1 " # Register once — store the DID and api_key permanently resp = requests . post ( f " { AURA_API } /register/ghost " , json = { " name " : " my-research-agent " }) identity = resp . json () print ( f " DID: { identity [ ' did ' ] } " ) print ( f " Key: { identity [ ' api_key ' ] } " ) # DID: did:aura:base:0x... # Key: aura_sk_...…