Metis Check

Metis Check asks the body that issues an identifier whether it exists and what it points to, then tells you in plain words.

WHAT IT CHECKS Scholarly: DOI, PubMed ID, arXiv id, ORCID iD, ROR ID, ISBN, OpenAlex ID. Companies and finance: Legal Entity Identifier (LEI), ISIN, CUSIP, SEC CIK, US EIN (tax-exempt), UK company number. Health and science: NPI, RxNorm RxCUI, PubChem CID, USGS event id. Other: Wikidata item, FAA N-number, domain name, U.S. case citation (CourtListener index).

HOW IT ANSWERS Each identifier gets exactly one of four states, never a score:

• settled true: the registry answered and the identifier resolves as stated.
• settled false: the registry answered and it does not.
• not decidable: the registry's answer does not settle it (for example the name given does not match the registered one); a person decides.
• unreachable: the registry did not answer in time. That is a delay, not evidence.

Anything not looked at is listed as not checked, with the reason.

FIVE TOOLS check_identifier checks one identifier. check_text finds every identifier in one passage you paste or point to (a paragraph, a reference list, an abstract) at its exact position and checks each one; the passage itself is not stored, only the identifiers, their positions and a hash. get_report opens a report you already have by its id. request_human_verification asks a Metis researcher to verify the identifiers in one of your reports by hand: that each resolves to the work or entity the citation names, and what the registry and the source document say (not whether the surrounding argument is true). The result is filed on the same report as a signed addendum with the reviewer's name and the date. set_live_verification turns that on for every report the account files, for eight hours, and off again. Where an account does not include human verification, these two tools say so and file nothing.

THE REPORT Every check ends in a report with a unique id (MC-XXXX-XXXX-XXXX), a public page, a PDF, signed receipts (the registry query, the HTTP status and the SHA-256 of the registry's answer) and a recheck button. Anyone with the link can recheck the report; the recheck asks the registries again, live, and is filed as a new report linked to the first. Reports also live on your Metis account page.

WHAT IT DOES NOT DO It does not grade a text true or false, and a report is not a statement that the surrounding text is accurate. It checks the identifiers in a text, not the argument around them. Registries are issuers or indexes: CourtListener is a case-law citation index, not the court that issued a decision. It does not read your conversation; it checks only the identifier or passage you give it.

ACCOUNT Requires a Metis account (sign in or create one when connecting). Checks count against the account's monthly allowance; the account page shows what has been used.