# Perplexity > Perplexity AI search and research. Use for AI search. Use when this capability is needed. - Skill: `tomevault-io/perplexity-2` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/perplexity-2` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/perplexity-2/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/perplexity-2 --- # Perplexity Perplexity is an AI search engine. For developers, the **Sonar API** provides grounded, cited answers for building search-enabled apps. ## When to Use - **Real-time Info**: "What is the stock price of Apple?" (LLMs can't answer this without tools). - **Research Apps**: Building an app that needs to cite sources. - **Citations**: You need reliability and links to original data. ## Core Concepts ### Sonar API API access to Perplexity's online models (`llama-3-sonar-large-32k-online`). ### Citations API returns a list of citations used to generate the answer. ### Pro Search Multi-step reasoning search (Googles multiple times to answer complex queries). ## Best Practices (2025) **Do**: - **Use for Grounding**: If your chatbot needs current events, route those queries to Perplexity. - **Use Search Options**: Filter by domain (e.g., search only `reddit.com` or `stackoverflow.com`). **Don't**: - **Don't use for creative writing**: It is optimized for facts, not fiction. ## References - [Perplexity API](https://docs.perplexity.ai/) --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/g1joshi) — claim your Tome and manage your conversions.