Hermes Agent Integrates Perplexity Search API

On September 9, Nous Research and Perplexity announced that the open-source Hermes Agent now integrates Perplexity's Search API as the backend for its websearch and webextract tools, giving it large-scale real-time web retrieval. The integration is live, and both sides publicly exchanged appreciation.

Confirmed

• Teknium of Nous Research confirmed Hermes Agent can now use the Perplexity Search API as the backend for websearch and webextract
• The API is backed by an index of over 400 billion URLs, returns real-time search results, and ranks snippets by relevance for agentic use cases
• Perplexity CEO Arav Srinivas praised Teknium and Nous Research's execution and taste, announcing Perplexity Search is now integrated into the Hermes Agent framework; Teknium reshared with thanks
• Perplexity's index now exceeds 450 billion high-quality URLs with plans to reach 1 trillion by year-end

Unconfirmed

• Index size figures vary slightly across posts: most cite 400B+ URLs while the CEO's latest figure is 450B+

Why it matters

• The integration brings Perplexity's large-scale search infrastructure to the open-source agent ecosystem, giving Hermes Agent users real-time web access without building their own retrieval
• For Perplexity, it is a key deployment of its Search API in agentic scenarios, aligning with its trillion-URL index expansion plan

2026-09-09 ~ 2026-09-09 · 5 related posts

• [source] Hermes Agent adds Perplexity Search integration, tapping an index of 400B+ URLs — Teknium · 2026-09-09
• Perplexity Search API lands in Hermes Agent with 400B+ URL index — inductionheads · 2026-09-09
• Nous Research's Hermes Agent adds Perplexity Search API with 400B URL index — max_paperclips · 2026-09-09
• Perplexity Search API lands in Hermes Agent with a 450B+ URL index — NousResearch · 2026-09-09
• [source] Perplexity Search lands in Nous Research's Hermes Agent, Teknium says thanks — Teknium · 2026-09-09