Four free, no-signup demos of Caesar search, hosted on one deployment. Each shows the same idea from a different angle: the answer is a live source, captured at a moment — not a model's memory.
The hosted demos are free to use, no signup: the server holds the Caesar API key. Powered by Caesar search.
- Verifier (
/verifier): paste a claim, a paragraph, or a URL; every factual claim is checked against live sources and shown with the exact captured passage and a timestamp. - Research (
/research): ask anything and get a short briefing: the extracted facts, then a numbered, dated list of where each one came from. - Monitor (
/monitor): name a topic and see the freshest captured items, newest first, a freshness radar for what's new right now. - Finder (
/find): name a product or describe the one you're picturing; Caesar identifies it and finds live retailer listings, each with a capture timestamp.
Every panel keeps quiet receipts, and where Caesar returns them, those receipts are character-precise: the exact character range and section of the quoted passage in the captured document, plus how many times the page has been captured.
The hub lives at / and links to all four.
git clone https://github.com/TF-Caesar/caesar-demo
cd caesar-demo
npm install
cp .env.example .env.local # then add your CAESAR_SEARCH_API_KEY
npm run devCAESAR_SEARCH_API_KEY is required: Caesar's API is keyed. Get a key at trycaesar.com (new accounts include $1,000 in credits). Deploying? Set it as a secret, e.g. fly secrets set CAESAR_SEARCH_API_KEY=<your-key> for the Fly deployment. Optional env:
CLAIMS_LLM_KEY— an Anthropic key for sharper claim extraction in the Verifier (off by default; deterministic otherwise).VERIFIER_DEMO=1— force the cached demo responses across all four demos (offline showcase / screenshots).
Every route has a graceful demo fallback, so the hosted demos never error under throttling or a missing key.
search the query → read the top sources → ground the result against the captured passage (or the full read text when no structured passage is returned). The entire Caesar integration is one small, dependency-light file you can copy into your own project: lib/caesar.ts.
Each demo also ships on its own:
- github.com/TF-Caesar/caesar-verifier
- github.com/TF-Caesar/caesar-research
- github.com/TF-Caesar/caesar-monitor — also a CLI + GitHub Action for tracking changes over time.
- github.com/TF-Caesar/caesar-finder
MIT.