Citation API with real page numbers
Send a sentence. Get an academic source that actually supports it, the page the claim appears on, and a formatted citation. Refusals are free — if nothing supports the claim, you pay nothing.
Free tier: 100 resolved citations, no card.
curl -X POST https://cytado.com/api/ext/find-source \
-H "Authorization: Bearer $CYTADO_KEY" \
-H "Content-Type: application/json" \
-d '{
"items": [{
"id": "c1",
"claim": "Children aged 2-5 spend on average more than two hours a day in front of a screen.",
"hint": "screen time in preschool children"
}],
"langs": ["en"]
}'{
"results": [{
"id": "c1",
"found": true,
"source": {
"title": "…",
"authors": "…",
"year": 2021,
"page_from": 47,
"page_from_label": "47",
"snippet": "…",
"relevance": 9
}
}],
"rozliczenie": { "cytowania": 1, "tematy": 0 }
}What makes it different from a search API
Crossref, OpenAlex and Semantic Scholar are free and excellent at metadata — and none of them can tell you which page your claim is on, because they never open the document. cytado reads the paginated text, finds the passage, and reports the printed page number: the one on the page itself, the one a supervisor checking your footnote will land on.
Four endpoints
POST /find-sourceA sentence in, a source with a page number out. The core call — this is what you are billed for.
POST /chapter-sourcesA chapter topic in, a set of citable sources out, ranked by how much of the topic they cover.
POST /formatMetadata in, ready footnotes and bibliography out — APA 7, MLA, Chicago, BibTeX, RIS. Free in every plan.
GET /usageWhat you have used this period, against your plan. The same numbers your invoice is built from.
Pricing
| Plan | Price / mo | Citations | New topics | Extra citation | Extra topic |
|---|---|---|---|---|---|
| Test | free | 100 | 3 | — | — |
| Start | €49 | 1,500 | 20 | €0.04 | €1.00 |
| Pro | €199 | 7,000 | 100 | €0.04 | €1.00 |
| Scale | €699 | 30,000 | 500 | €0.04 | €1.00 |
A citation is one sentence resolved to a source with a page number. A new topic is building the corpus for a subject we do not have yet — it takes minutes of work and costs two orders of magnitude more, so it is metered separately. Formatting is free.
What it will not do
It will not invent a source for a claim nothing supports — you get an explicit miss, not the nearest match dressed up as an answer. It will not attach a page number to a document without printed pagination. Sources we may not republish are returned as metadata and a short quotation under fair use, never as full text.