Loupe Citation Checker
Claude connectorCommunityChecks the citations in a US legal draft against public sources: whether each authority exists, is the one named, and is quoted correctly,…
- Tools
- 5
exposed by this connector
Movement
From our daily snapshots over the last 30 days.
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Popularity score
Trending score
Movement is measured against our own daily snapshots, and there isn’t an earlier one to compare with yet.
In its categories
How this connector compares with others in the same category. Positions are counted within the category, not across the whole directory.
Legalnot ranked by popularity · not ranked by trending score
This connector isn’t ranked by popularity, so the category’s top connectors are shown instead.
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 1 | 20,114 | 1places up | ||
| 2 | 18,526 | 0 | ||
| 3 |  Dropbox | 18,068 | 5places up | |
| 4 | 16,725 | 2places down | ||
| 5 | 16,488 | 4places down | ||
| 6 | 16,250 | 3places down | ||
| 7 | 16,225 | 1places down |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 |  Paxton Legal Research | 1,387,274 | 6places down | |
| 2 | 436,492 | 1places down | ||
| 3 |  Patent Bear | 289,074 | 45places up | |
| 4 |  PointOne | 231,587 | — | |
| 5 | 122,139 | 13places up | ||
| 6 |  8am MyCase | 117,028 | 43places up | |
| 7 |  Filevine | 82,152 | 70places down |
Productivitynot ranked by popularity · not ranked by trending score
This connector isn’t ranked by popularity, so the category’s top connectors are shown instead.
| # | Connector | Popularity | Trending | 7d |
|---|---|---|---|---|
| 1 | 24,674 | 0 | ||
| 2 | 23,930 | 0 | ||
| 3 | 22,285 | 0 | ||
| 4 |  Notion | 22,149 | 0 | |
| 5 | 21,822 | 0 | ||
| 6 | 20,663 | 1places up | ||
| 7 | 20,635 | 1places up |
This connector isn’t ranked by trending score, so the category’s top connectors are shown instead.
| # | Connector | Trending | Popularity | 7d |
|---|---|---|---|---|
| 1 |  Amazon Selling Partner | 20,051,962 | — | |
| 2 | 16,163,753 | 2places up | ||
| 3 | 2,749,468 | 18places up | ||
| 4 | 1,895,581 | 172places up | ||
| 5 |  Tineo | 1,215,161 | 27places up | |
| 6 | 1,093,314 | — | ||
| 7 | 865,660 | 39places up |
Loupe checks the authorities cited in United States legal writing (cases, statutes, regulations, court rules and links) against the sources that settle them, and says plainly which checks ran and which did not.
With Loupe connected, Claude can:
- check a passage or a whole draft, finding cases that do not exist, citations that lead to a different case, pin cites outside the opinion, wrong years or reporters, and dead links;
- check a single citation;
- find a case by name in Loupe's index of American case law;
- verify that quoted words are in the opinion they are attributed to, and whose words they are (Solo and Firm plans);
- make a sealed record of a check, kept in the user's Loupe account and verifiable at loupe.legal/verify (Solo and Firm plans).
How it checks: no language model is asked whether a citation is right, and nothing is generated. Whether a case exists is answered from Loupe's own index, built from public-domain court data with the page ranges of close to seven million opinions. Statutes and regulations are asked of their publishers: the House's U.S. Code, GovInfo, the eCFR, Congress.gov and the Federal Register. A citation Loupe could not settle is reported as not verified, never as correct and never as wrong.
What it does not do: it does not say whether a case is still good law or whether it supports the point. That remains the lawyer's reading. It is not legal advice.
Users sign in with a Loupe account, which is free. The text sent for checking is not kept.
Tools
- check_citation
- check_draft
- evidence_bundle
- find_case
- verify_quote
- Categories
- Sign-in
- Required
- Connector URL
- https://loupe.legal/mcp
- Transport
- Streamable HTTP
- Works with
- Claude, Claude API, Claude Code, Claude Desktop
- Added
- October 1, 2026
- More info