# DOI checker: does the record exist, and does the title match?

> One DOI, or a DOI plus the title you cited. Resolves against Crossref and DataCite. Dead DOIs, title mismatches, and retractions show up in seconds. This is existence, not formatting, and not a claim verdict.

## Which job do you need?

| What you need | The answer | Where |
| --- | --- | --- |
| I want APA or Harvard generated from the DOI | That is a generator. Scribbr or citation.doi.org are built for that. Acurio does not format citations. | Elsewhere |
| I want to know this DOI exists and matches the title | That is this field. One DOI, optionally a title. | This page |
| I want to know the source supports the sentence in my thesis | That is the analysis: thesis plus uploaded sources, not this mini-check. | Elsewhere |

## What the DOI checker does

AI lists often pair a real DOI with a different title. The checker resolves the DOI and puts the registry title next to the text you supplied.

A dead DOI (no Crossref or DataCite record) is an existence problem. A live DOI with a retraction flag is too. Same core as Quick Check, here for one identifier.

For a whole reference list: Quick Check. For whether the source supports your claim: an analysis with uploads.

## Frequently asked questions

### What does the DOI checker verify?

Whether the DOI resolves in Crossref or DataCite, which metadata sits there, whether a supplied title matches, and whether the record is marked as a retraction.

### Is it free?

Yes. One DOI, no account. A full list in Quick Check is also free. Claim-by-claim analysis of a thesis needs an account and credits.

### Does this check APA or Harvard?

No. Formatting is a different job. This is identity: does the record exist, and is it the work you meant.

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Source: https://acurio.ch/en/doi-checker