Perplexity Has a Free API: Build AI Search Into Your Applications

What is Perplexity API? Perplexity API gives you programmatic access to their AI search engine — the one that provides real-time, cited answers from the web. Unlike ChatGPT which hallucinates sources, Perplexity actually searches the internet and provides verifiable citations. Why Perplexity API? Real-time web search — answers include current information, not training data Built-in citations — every claim comes with a source URL OpenAI-compatible — drop-in replacement for OpenAI SDK Multiple models — sonar-small (fast), sonar-medium, sonar-large (best) No RAG needed — the web IS your knowledge base Quick Start from openai import OpenAI client = OpenAI ( api_key = " your-perplexity-key " , # From pplx.ai/settings/api base_url = " https://api.perplexity.ai " ) response = client . chat . completions . create ( model = " sonar " , messages = [{ " role " : " user " , " content " : " What are the latest Kubernetes security best practices in 2026? " }] ) print ( response . choices [ 0 ]. mess