SearchBase
SearchBase is an open-source web search and fetch API for AI agents, built by Coolapso AB in Kiruna, Sweden, and licensed under AGPLv3. Its hosted service runs on Scaleway in Europe and searches Staan, the independent European index from Ecosia and Qwant, rather than Google or Bing. On Opper, pin it with "engine": "searchbase" and any tool-calling model searches through it, with citations in your endpoint's own shape and every search in your traces.
SearchBasewithinAdd SearchBase 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.
Key info
"engine": "searchbase"In your code
curl https://api.opper.ai/v3/compat/chat/completions \-H "Authorization: Bearer $OPPER_API_KEY" \-H "Content-Type: application/json" \-d '{"model": "openai/gpt-5.5","messages": [{"role": "user", "content": "What changed in the news today?"}],"tools": [{"type": "opper:web_search", "engine": "searchbase"}]}'
Use SearchBase with these models
Step-by-step setup for SearchBase on each of these models through Opper.
More tools on Opper
Jina search
Opper's default search engine for models without their own. Search processing stays in the EU.
"engine": "jina"
Exa search
Exa's search engine built for AI, on any tool-calling model through one tool entry. US-based.
"engine": "exa"
Linkup search
Linkup's search for AI apps, running in the US, EU, Canada and APAC, on any tool-calling model.
"engine": "linkup"