Exa search

Exa is a search engine built for AI by Exa Labs in San Francisco, the company that was called Metaphor until 2024. It runs its own index of more than 500 billion web pages, searches it with its own embedding models, and returns up to 100 results per query with domain, date and category filters. On Opper it is one tool entry away for any model that can call tools: pin it with "engine": "exa", with no separate Exa key or search loop to build. Exa is US-based, so pick Jina or SearchBase when searches have to stay in the EU.

Use

Exa searchwithin

Add Exa search on Opper

Set up with agents

Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.

Get your API key

Key info

Works on

Chat CompletionsResponsesMessagesGeminiSearch API

Region

Pin it with

"engine": "exa"

Citations

Per answer block

In your code

1curl https://api.opper.ai/v3/compat/chat/completions \
2  -H "Authorization: Bearer $OPPER_API_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{"model": "openai/gpt-5.5",
5       "messages": [{"role": "user", "content": "What changed in the news today?"}],
6       "tools": [{"type": "opper:web_search", "engine": "exa"}]}'