Ask the literature. Get the trial, the paper and the page.
Human sleep research from the public biomedical infrastructure: the open-access full texts of PubMed Central articles under CC0, CC BY and CC BY-SA, ClinicalTrials.gov registrations, and one AHRQ evidence report from the NCBI Bookshelf, 77,899 texts, every one carrying its license and source. Research literature, not medical advice; no subscription literature, no abstracts of closed articles, no clinical practice guidelines.
The registry and the papers answer together. NCT00230737, Melatonin Randomized Trial for Insomnia in the Elderly: phase 2, completed, 27 enrolled, 0.4 mg against 4.0 mg, for sleep initiation and maintenance disorders. NCT07695246: cognitive behavioural therapy for insomnia with and without adjunct melatonin in older adults, randomised, double-blind, placebo-controlled, measuring sleep, circadian outcomes and daytime functioning. The largest paper, Wade and colleagues, nightly prolonged-release melatonin for six months: 791 randomized, 722 analysed, patients 55 and older, sleep latency shortened by 15.6 minutes in the 65 to 80 group (95 percent CI minus 25.3 to minus 6.0). The systematic review and meta-analysis of melatonin and ramelteon in older adults with chronic insomnia searched 1990 to June 2021, the year the Beers Criteria chose, and pools these designs. One hit was dropped on reading: the tasimelteon phase III trial tests a receptor agonist, not melatonin.
Real, from the sealed sleep collection, asked through the same engine the door serves, on 12 October 2026. Registrations and full texts on one answer, with the arms, the numbers and the one that did not belong.
What is in the collection, and what is not.
Every door carries a card, sealed with the collection and shown to your assistant on every connection. This one reads:
Human sleep research from the public biomedical infrastructure: the open-access full texts of PubMed Central articles under CC0, CC BY and CC BY-SA, ClinicalTrials.gov registrations, and one AHRQ evidence report from the NCBI Bookshelf (a US Government work). Every text is openly licensed or in the public domain and carries its licence and source. It holds no subscription literature, no abstracts of closed articles and no clinical practice guidelines; it is research literature, not medical advice.
Sealed 2026-09-22; 77,899 texts; nothing is added, changed or removed, and a question outside the collection is answered "not in this corpus".
Full texts, openly licensed.
PubMed Central articles under CC0, CC BY and CC BY-SA, normalized with their license flags, cited to the passage.
Trial registrations.
ClinicalTrials.gov records with status, phase, enrollment, conditions and arms, so "which trial tested what" is answered from the registry and tied to the papers that report it.
What stays out.
Abstract-only records, author manuscripts and publisher open access under other licenses, the clinical practice guidelines, and the literature indexes that need the reader's own subscription.
Ask across editions, across volumes, across the shelf.
Trials and papers
Which trials registered this intervention, with which arms, and which papers report them?
Which studies report this effect at this dose, and where do they disagree?
Which registration belongs to this paper?
Over time
What is the earliest paper here making this claim, and did a replication fail?
Which review pooled these trials, and what window did it search?
Evidence and gaps
Which papers cite the same underlying experiment rather than providing independent evidence?
What does the collection not contain on this question?
One address, one sign-in, every answer cited to the passage.
The sealed collection above is served as an MCP server at https://sleep.docenta.ai/mcp: a public collection we host on purpose so your assistant can ask it today. You add it once; from then on it asks the collection the way it asked the question above, and reads the paper or the registration back with its license.
Register once
Use the form at the bottom of this page and say "sleep". You confirm your address with one click, and that registration is what opens the collection for you. There is no key to copy, ever: the address below is not a secret, and signing in is what makes it yours.
Add the address to your assistant
https://sleep.docenta.ai/mcp
Claude Code: one line, then type /mcp and press Enter on docenta-sleep.
claude mcp add --transport http docenta-sleep https://sleep.docenta.ai/mcp
Claude (web and desktop): Settings, Connectors, Add custom connector, paste the address, Connect. ChatGPT: Settings, Connectors, Create, paste the address, choose OAuth.
Allow it, once
Your assistant opens a docenta page by itself. It asks who you are (your address and six digits from your mail; nothing at all if you come from your start page) and shows one sentence: which assistant, which collection. Press Allow. You can disconnect any assistant later on your start page.
Ask, and read the citation
Every answer names the document and the page it came from. The first question after a quiet spell can take half a minute while the collection wakes up; your assistant is told so and asks again by itself.
The door never sees your files, and cannot be changed by anyone, us included, without a new seal and a new date on this page. It knows that a registered person asked, so each person gets a fair share of it. It keeps nothing you ask unless you choose to, with two boxes that start unticked when you connect: "tell me when a question can be answered later", which keeps only the questions the collection could not answer, and "keep my questions, without my name", which keeps the words for 180 days with no name, address or time of day beside them. You can change both on your start page.
Boundedness is the feature.
It is research literature, not medical advice. The door cites the paper, the page and the registration; what to do about it is not retrieval.
A near miss is read and dropped. A receptor agonist trial surfaced for a melatonin question; reading it put it out, and the answer says so.
The window is stated. A review's search dates are part of its citation, because a 2021 window cannot pool a 2026 trial.
The seal is the date. Nothing is added, changed or removed after the seal; a new seal means a new date on this page.
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What is one question your files should be able to answer today?
docenta is a commercial product of SKY, LLC, now in private preview. Tell us the question; we will tell you when the door opens, and the questions we hear shape what we build.
No account and no newsletter: you confirm your address by mail, then we write back when the door opens. Prefer mail? sleep@docenta.ai