Keyline FAQ

Common questions about file types, size limits, sharing, supported languages, and troubleshooting.

What file types does Keyline support?

Keyline accepts PDF, PNG, JPEG, DOCX, and XLSX files. Upload one and Keyline analyzes it and builds a search index automatically; see Getting started for the upload flow.

Is there a file size or page limit?

Each file can be up to 260 MB and 500 pages. Your library itself is uncapped, so you can keep adding files. If a document exceeds either per-file limit, split it before uploading.

Who can see the files I upload?

Uploaded files and their conversations are visible to the members of the library you upload into. They stay inside that library.

What languages does Keyline support?

Keyline can read and answer questions in multiple languages, including English and Japanese. You can ask a question in a different language than the source document.

The retrieval API

These answers cover Keyline as an API you call from your own code. The landing page for that audience is Keyline for developers, and the call-by-call reference is the agent runbook.

How does the Keyline API differ from a document parsing API?

Parsing tools convert a document you hand them, per call. Keyline answers a question across a library you indexed earlier and decides for itself which pages to read. For structured output from one known file, a parsing API is the right tool.

Do I have to bring my own vector store?

Keyline builds and owns its own index over the documents you send it. Embeddings, chunking, and the database are handled for you.

Can I use my own model?

The reasoning that decides what to read is part of the product. Keyline returns text and images to your application, and you use whatever model you like from there.

How do I know when a document is ready?

Poll its status. Documents become deep-readable slightly before the library-wide search index finishes, so there are two states that both mean usable.

What does a citation look like?

A numbered reference that resolves to a file, a page number, and a cropped PNG of the block the claim came from. Region coordinates for that block arrive with the preview.

Will Keyline read scanned documents?

Yes. Every page is analyzed as an image, so a scan is an ordinary case. Architectural, electrical, and wiring drawings are a confirmed failure case in our own testing, so build elsewhere for those.

Is there a free tier?

Public Preview access comes with $50 in free credit, then usage-based pricing. Indexing has a real per-page cost, so pricing stays usage-based after the credit runs out. Rates and published limits live on the pricing page.

How do I get an API key today?

Troubleshooting

My upload seems stuck

Indexing runs at roughly 30 seconds per page, so a long document takes real time: a 500-page manual is a few hours. Keyline also processes about three files per library at once, so a bulk upload queues behind the files ahead of it. Check the file's status before re-uploading it.

Keyline's answer did not match what I expected

Open the citation to see the block it came from: the page number plus a cropped image of the figure, table, or paragraph behind the claim. If that block does not support the answer, rephrase the question more specifically, for example naming the figure, table, or section you are asking about.