Liner AI Search: Sources, Citations and Site Access
Liner is an AI search and research tool with web and scholar search. Which sites it cites most, and what it documents about crawler access.
Liner is an AI search and research company. People use the Liner app to search, read and organize sources, and developers use the Liner API for web and scholarly search. Liner says that it cites a source for every sentence of its answers. Liner publishes no crawler documentation, so there is no documented user agent or robots.txt token.
Where Liner answers come from
Liner’s developer index and API documentation describe two search sources:
- Web Search, which returns web search results for a query. Liner does not say which index or crawler supplies these results.
- Scholar Search, which uses “Liner’s proprietary academic database” of papers.
The Liner Search Agent searches web and academic sources and writes answers with sentence-level citations. The Liner about page says: “we cite high-quality sources for every sentence.” The Liner Model API does not search the web by itself. A developer must pair it with the Search API or the Search Agent API.
Which sites Liner cites most
In October 2025, Liner published its own analysis of the sites that it cited through July 2025. The page does not explain how Liner counted the citations.
| Source | Share of Liner citations |
|---|---|
| Semantic Scholar | 31.0% |
| ScienceDirect | 2.7% |
| Springer Nature Link | 1.9% |
| Taylor & Francis Online | 1.6% |
| Wiley Online Library | 1.6% |
Most of the top sources are academic databases and journal publishers. For the largest source, see Semantic Scholar.
Crawlers and robots.txt
As of October 2026, Liner has no crawler page, no published IP list and no robots.txt token. Liner documents no way to add a site to its sources or to remove one. If you see unknown bot traffic in your logs and want to stop it, block it on your server or firewall.