# Citation Checker: Find Fake References and Check DOIs (`fernandosord/citation-checker-doi-validator`) Actor
Check reference lists against Crossref, DataCite and OpenAlex. Each reference is verified, mismatch (with the fields that differ), not found (possibly made up) or ambiguous, with DOI, retraction flag, open-access link and a corrected APA or BibTeX citation.
- **URL**: https://apify.com/fernandosord/citation-checker-doi-validator.md
- **Developed by:** [Plainsource](https://apify.com/fernandosord) (community)
- **Categories:** AI, Automation
- **Security:** Limited permissions
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet
## Pricing
from $4.00 / 1,000 reference checkeds
This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.
Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event
## What's an Apify Actor?
An Actor is a serverless cloud program that runs on the Apify platform. It has two run modes.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Apify vocabulary and the platform model are defined once, in the agent quickstart at https://apify.com/agents.md.
## How to integrate an Actor?
If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.
For examples already wired to this Actor's own input schema, see the [API](#api) section below.
Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).
# README
### What this Actor does
Citation Checker takes a list of references and looks each one up in Crossref, DataCite and OpenAlex. For every reference it tells you whether the cited work exists and whether the citation describes it correctly:
- `verified`: a record matches the title, authors, year and venue.
- `mismatch`: the work exists, but some details in the citation are wrong. `mismatchedFields` lists which: `title`, `authors`, `year`, `venue` or `doi`.
- `not_found`: Crossref, DataCite and OpenAlex were all searched and none has a matching record. The citation may be made up, or the work may not be indexed (see the limits below).
- `unverified`: Crossref and DataCite have no match and OpenAlex could not be searched (its free daily budget was used up, or a lookup failed), so the Actor cannot tell whether the work exists. These rows are never flagged as possibly made up and are not charged.
- `ambiguous`: two different records fit about equally well, or only part of the citation agrees with the closest record.
Each row also carries the matched record (DOI, title, authors, year, venue, type), a retraction flag from Crossref and Retraction Watch, the open-access status and best free link from OpenAlex, the citation count, and a corrected citation in APA, BibTeX and the style you pick.
It was built for checking text written with AI tools, which often cite papers that do not exist or attach a real DOI to the wrong paper. Editors, reviewers, students and AI agents can run it on a bibliography before it goes out.
### Input
Give references in any of these fields. You can combine them in one run.
| Field | Default | What it does |
|---|---|---|
| **References** (`references`) | none | One reference per item: a citation in any style (APA, MLA, Chicago, Harvard, IEEE, Vancouver, Nature), a DOI, a doi.org link or an arXiv ID. An item can also hold a BibTeX entry. |
| **Reference list (paste)** (`text`) | empty | A whole bibliography: one reference per line, or references separated by blank lines. Numbered lists (`[1]`, `1.`) whose items wrap over several lines are joined. BibTeX pasted here is read as BibTeX. |
| **BibTeX** (`bibtex`) | empty | BibTeX entries, for example an export from Zotero, Mendeley, JabRef or Overleaf. Entries need a title or a DOI. |
| **PDF URLs** (`pdfUrls`) | none | Direct links to PDFs. The Actor reads the text after the last "References" or "Bibliography" heading and checks each reference. Up to 20 PDFs and 500 references per PDF. |
| **Style of corrected citations** (`citationStyle`) | `apa` | `apa`, `mla`, `chicago` (author-date), `harvard`, `ieee`, `vancouver` or `bibtex`. APA and BibTeX are always included as well. |
| **Contact email for Crossref** (`crossrefMailto`) | empty | Optional. With an email, Crossref serves your searches from its polite pool (3 a second instead of 1). Falls back to the `CROSSREF_MAILTO` environment variable. |
| **OpenAlex API key** (`openAlexApiKey`) | empty | Optional free key from openalex.org/settings/api. Falls back to the `OPENALEX_API_KEY` environment variable. See the limits section for why it helps. |
| **Search OpenAlex when Crossref and DataCite have no good match** (`useOpenAlexSearch`) | `true` | Turn off to use OpenAlex only for open-access data and citation counts. With it off, a reference that Crossref and DataCite do not hold is reported as not found, even though OpenAlex might have it. |
| **Maximum references** (`maxReferences`) | `1000` | References beyond this number are not checked and not charged (1 to 5,000). |
Example input with a pasted list and a PDF:
```json
{
"text": "[1] Granovetter MS. The strength of weak ties. Am J Sociol. 1973;78(6):1360-80.\n[2] Hardin G. The tragedy of the commons. Science. 1968;162(3859):1243-8.",
"pdfUrls": ["https://arxiv.org/pdf/1810.04805"],
"citationStyle": "vancouver",
"crossrefMailto": "you@your-university.edu"
}
```
### Output
One row per reference in the dataset. This is a real row from a test run on Apify. The input was the bare DOI of the 1998 Wakefield paper, which The Lancet retracted in 2010:
```json
{
"index": 3,
"input": "10.1016/S0140-6736(97)11096-0",
"inputType": "doi",
"sourcePdfUrl": null,
"status": "verified",
"confidence": 1,
"mismatchedFields": [],
"possibleHallucination": false,
"notes": [],
"matchedDoi": "10.1016/s0140-6736(97)11096-0",
"matchedTitle": "RETRACTED: Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children",
"matchedAuthors": ["Wakefield, AJ", "Murch, SH", "Anthony, A", "Linnell, J", "Casson, DM", "Malik, M", "Berelowitz, M", "Dhillon, AP", "Thomson, MA", "Harvey, P", "Valentine, A", "Davies, SE", "Walker-Smith, JA"],
"matchedYear": 1998,
"matchedVenue": "The Lancet",
"matchedType": "journal-article",
"matchedPublisher": "Elsevier BV",
"matchedVolume": "351",
"matchedIssue": "9103",
"matchedPages": "637-641",
"matchedUrl": "https://doi.org/10.1016/s0140-6736(97)11096-0",
"matchSource": "crossref",
"retracted": true,
"retractionDate": "2010-02-06",
"retractionNoticeDoi": "10.1016/s0140-6736(10)60175-4",
"expressionOfConcern": false,
"corrected": true,
"updateNotices": [
{ "type": "correction", "date": "2004-03-06", "doi": "10.1016/s0140-6736(04)15715-2", "source": "retraction-watch" },
{ "type": "retraction", "date": "2010-02-06", "doi": "10.1016/s0140-6736(10)60175-4", "source": "retraction-watch" }
],
"isOpenAccess": false,
"oaStatus": "closed",
"bestOaUrl": null,
"citationCount": 3011,
"openAlexId": "W2117847125",
"citationStyle": "apa",
"formattedCitation": "Wakefield, A. J., Murch, S. H., Anthony, A., Linnell, J., Casson, D. M., Malik, M., Berelowitz, M., Dhillon, A. P., Thomson, M. A., Harvey, P., Valentine, A., Davies, S. E., & Walker-Smith, J. A. (1998). RETRACTED: Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children. The Lancet, 351(9103), 637–641. https://doi.org/10.1016/s0140-6736(97)11096-0",
"apaCitation": "Wakefield, A. J., Murch, S. H., Anthony, A., Linnell, J., Casson, D. M., Malik, M., Berelowitz, M., Dhillon, A. P., Thomson, M. A., Harvey, P., Valentine, A., Davies, S. E., & Walker-Smith, J. A. (1998). RETRACTED: Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children. The Lancet, 351(9103), 637–641. https://doi.org/10.1016/s0140-6736(97)11096-0",
"bibtex": "@article{wakefield1998retracted,\n author = {Wakefield, AJ and Murch, SH and Anthony, A and Linnell, J and Casson, DM and Malik, M and Berelowitz, M and Dhillon, AP and Thomson, MA and Harvey, P and Valentine, A and Davies, SE and Walker-Smith, JA},\n title = {{RETRACTED: Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children}},\n journal = {The Lancet},\n year = {1998},\n volume = {351},\n number = {9103},\n pages = {637--641},\n doi = {10.1016/s0140-6736(97)11096-0}\n}",
"alternatives": [],
"parsedTitle": null,
"parsedFirstAuthor": null,
"parsedYear": null,
"parsedVenue": null,
"checkedAt": "2026-10-26T21:21:10.334Z",
"error": null
}
```
Other fields worth knowing:
- `confidence` is the confidence in the status, from 0 to 1. For `verified` and `mismatch` it is the match score. For `not_found` it is higher when even the closest record is far from the citation.
- `possibleHallucination` is `true` for `not_found` references that look like articles, for references whose DOI belongs to a different work, and for mismatches in three or more fields.
- `alternatives` lists up to three of the closest records (DOI, title, first author, year, venue, `titleSimilarity`, `score`) for `not_found`, `ambiguous` and `mismatch` rows.
- `parsedTitle`, `parsedFirstAuthor`, `parsedYear` and `parsedVenue` show what the Actor read from your citation, which helps when a result looks wrong.
- `notes` explains special cases: a preprint matched instead of the published version, a cited DOI that belongs to another paper, or OpenAlex search being unavailable.
Statuses that are not charged: `unverified` (no match in Crossref or DataCite, and OpenAlex could not be searched), `duplicate` (the same reference appeared earlier in the run), `invalid` (too short to be a reference), `error` (the indexes could not be reached), `not_allowed` (a PDF URL that is private or disallowed by robots.txt) and `skipped` (the run reached your cost limit).
The run also saves these records in its key-value store:
- `OUTPUT`: counts per status, the list of possibly made-up references with the reason, retracted references, mismatches, PDF results and the number of charged references.
- `BIBLIOGRAPHY`: the verified, mismatched and ambiguous references as corrected citations in your chosen style.
- `BIBTEX`: the same references as a `.bib` file.
### How matching works
1. The Actor reads the citation and pulls out the DOI, arXiv ID, years, first author, title and venue. It handles APA, MLA, Chicago, Harvard, IEEE, Vancouver and Nature styles, and the author-year and numbered reference lists found in PDFs.
2. A DOI or arXiv ID in the citation is looked up directly. Then the citation is searched in Crossref (`query.bibliographic`). If Crossref has no convincing match, the title is searched in DataCite (arXiv, Zenodo and other repositories, exact phrase first and then with typo tolerance) and in OpenAlex.
3. Each candidate gets a score from title similarity (60%), author surnames (20%), year (10%) and venue (10%). Titles are compared after removing accents, punctuation, case and HTML tags, with an edit-distance ratio, so typos still match. Years within one of each other count as the same, which covers online-first and print dates. Journal abbreviations (`N Engl J Med`, `Proc Natl Acad Sci USA`) and conference short names (NeurIPS, CVPR, ACL) are matched against the full names.
4. A preprint and its published version are treated as one work. If you cite the journal, the published version is returned; if you cite arXiv, the preprint is, with a note about the published version.
5. Retraction data comes from the `updated-by` field of the Crossref record, which includes notices from publishers and from the Retraction Watch database. OpenAlex's `is_retracted` flag is used as a second source.
### Accuracy
The numbers depend on whether OpenAlex search is available (see the limits section).
**Blind test, 26 October 2026.** 30 references the matcher was never tuned on: 16 real references sampled at random from the reference lists of three recent papers (forest-bird ecology in Scientific Reports, 2025; family economics in the Journal of Population Economics, 2026; protein language models in Nature Machine Intelligence, 2025), 6 more of their references with one detail changed (year, journal, first author, DOI or a title word), and 8 made-up references in the same fields, most under real authors' names. The set is in `test/eval/blind-review-2026-10-26.json`.
| Condition | Real references `verified` | Made-up flagged (precision / recall) | Wrong detail found (precision / recall) | Real references flagged as possibly made up |
|---|---|---|---|---|
| Run on Apify, OpenAlex search available | 10 of 16 | 0.73 / 1.00 | 0.63 / 0.83 | 1 of 16 |
| Local run, OpenAlex search budget used up | 9 of 16 | 0.50 / 0.13 | 0.57 / 0.67 | 0 of 16 |
With OpenAlex search available:
- One real reference was flagged as possibly made up: the 2023 UniProt database update, cited as "The UniProt Consortium UniProt: ..." without a full stop after the group name, so the group name was read as part of the title and older yearly updates ranked higher.
- The other two flags were the reference with a changed title word (reported `not_found` rather than as a title error) and the one with another paper's DOI, which is flagged on purpose.
- Three correct citations came back `mismatch`: a discussion paper matched to its later journal version (`venue`), a 1996 journal article matched to its 1993 working paper (`year`) and an ICLR 2019 paper matched to its 2017 arXiv preprint (`year`).
- A web page and a book cited without its DOI came back `not_found`, with a note and without the flag.
Without OpenAlex search, 13 of the 30 came back `unverified`, including 7 of the 8 made-up references; the one flagged had another paper's DOI.
**Sets used while building the matcher** (`test/eval/references.json`, 41 references, and `test/eval/holdout.json`, 25). They were used for tuning, so they are not blind. With OpenAlex search unavailable, the current version returns `verified` for all 38 real and retracted references, finds all 10 wrong details and flags all 6 retractions. 4 of the 18 made-up references are flagged (those with a fake or borrowed DOI); the other 14 come back `unverified`. One real reference cited with another paper's DOI is flagged on purpose.
In an earlier development run on real reference lists from three papers (BERT, "Attention Is All You Need" and a PLOS ONE stroke study; 135 references) in a run on Apify with OpenAlex search available, 126 came back `verified`, 4 `mismatch`, 2 `ambiguous` and 3 `not_found`. Two of the 135 were flagged as possibly made up, both real: a dataset ("Quora question pairs") and a magazine article that none of the indexes holds. The four mismatches were a title abbreviated in the citation, a shortened title, a symposium paper whose record names another venue, and a book chapter whose record carries a later date. That run took 4 minutes 47 seconds, including reading the three PDFs.
### Pricing
You pay per event:
| Event | Price |
|---|---|
| Actor start | $0.002 per run |
| Reference checked | $0.004 per reference |
A reference is charged when it gets an answer: `verified`, `mismatch`, `not_found` or `ambiguous`. References that could not be verified, duplicates, invalid lines, failed lookups, refused PDFs and references skipped at your cost limit are free. Reading a PDF is free; its references are charged like any others. Checking a 50-reference bibliography costs $0.002 + 50 × $0.004 = $0.202.
If a run reaches the maximum cost you set, the remaining references are marked `skipped` and the run finishes normally.
### Limits
- **Made-up references are only flagged when OpenAlex can be searched.** Many real works (conference papers without DOIs, older articles, small journals) are only in OpenAlex. Without an OpenAlex key, OpenAlex search uses a free daily budget shared by everyone on the same IP address (about 100 searches a day), which often runs out on shared servers. When it is unavailable, a reference that Crossref and DataCite do not hold comes back `unverified` instead of `not_found`: it is not flagged and not charged, and its notes say why. Only a cited DOI that is not registered, or that belongs to another work, is still flagged. In the blind test above, 7 of 8 made-up references came back `unverified` this way. A free OpenAlex key avoids this.
- **Books, reports, theses, datasets and web pages** are often not indexed. A `not_found` reference that looks like one of these gets a note and is not flagged as possibly made up.
- **Speed.** Without a contact email, Crossref allows 1 search a second; in the test run on Apify that came to about 40 references a minute. With `crossrefMailto` set, Crossref allows 3 searches a second.
- **PDFs** need a text layer (scanned PDFs are not read), must be direct links to the PDF file, must be allowed by the site's robots.txt, and must be under 40 MB. A PDF that needs more than about 60% of the run's memory to read, or more than about 3 minutes, is stopped and reported as `error`; run again with more memory for very large files. Private and local addresses are refused, including through redirects. Sites that block automated visitors are reported as `error` and not charged.
- **Titles in corrected citations** keep the capitalisation the publisher registered; APA's sentence case is not applied automatically.
- **Metadata errors** in the indexes carry through. For example, a book chapter reprinted years later can show the reprint year, which produces a `year` mismatch.
### Data sources and their terms
- **Crossref REST API.** Since 1 December 2025 the public pool allows 5 single-record and 1 list request a second with 1 at a time; the polite pool (requests with a `mailto`) allows 10 and 3 a second with 3 at a time ([Crossref blog](https://www.crossref.org/blog/announcing-changes-to-rest-api-rate-limits/), [access and authentication](https://www.crossref.org/documentation/retrieve-metadata/rest-api/access-and-authentication/)). Crossref describes its metadata as "openly shared with the global scholarly community through our free APIs" ([tips for using the REST API](https://www.crossref.org/documentation/retrieve-metadata/rest-api/tips-for-using-the-crossref-rest-api/)). Retraction Watch data is in the REST API, marked with `source: retraction-watch`, and updated every working day ([Crossref: Retraction Watch](https://www.crossref.org/documentation/retrieve-metadata/retraction-watch/)).
- **OpenAlex.** CC0 data ([api.openalex.org](https://api.openalex.org/)). 10 requests a second without a key and 30 with a free key ([authentication](https://help.openalex.org/api/authentication/)). Single-work lookups are free, list requests cost $0.0001 and searches $0.001 of the daily budget ([quick reference](https://help.openalex.org/api/llm-quick-reference/)); without a key the budget is $0.10 a day per IP address, as reported in the API's rate-limit headers.
- **DataCite REST API** for arXiv and repository DOIs, with a limit of 3,000 requests per 5 minutes per IP address ([DataCite support](https://support.datacite.org/docs/is-there-a-rate-limit-for-making-requests-against-the-datacite-apis)). The Actor stays at 1 request a second.
- **doi.org handle API**, to tell a DOI that is not registered at all from one whose agency has no metadata.
The Actor identifies itself as `PlainsourceCitationChecker` in its User-Agent and backs off when an API returns HTTP 429.
### FAQ
**Is a `not_found` reference always made up?** No. It means none of the three indexes has a matching record. Check the `alternatives` and `notes`: a near miss in `alternatives` often points to the real paper, and works without a DOI may need an OpenAlex key to be found.
**Why is a correct citation reported as `mismatch`?** The indexes sometimes hold a different version: a reprint with a later year, a title registered without its subtitle, or a conference paper registered under its journal version. `notes` and the matched fields show what was compared.
**Can I check DOIs only?** Yes. Put one DOI per item in **References**. A registered DOI comes back `verified` with its record; an unregistered one comes back `not_found`.
**Which email should I give Crossref?** Any address where you can be reached about your requests. Crossref uses it to sort traffic into its faster pool and to contact you if your requests cause problems.
**Can an AI agent call it?** Yes, through the Apify API or the Apify MCP server. For example, with the API client: `client.actor("fernandosord/citation-checker-doi-validator").call({ references: ["10.1038/nature14539"] })`. The `possibleHallucination` field and the `OUTPUT` summary are meant for this use.
# Actor input Schema
## `references` (type: `array`):
One reference per item: a full citation in any style (APA, MLA, Chicago, Harvard, IEEE, Vancouver, Nature), a DOI, a doi.org link or an arXiv ID. An item can also hold a whole BibTeX entry.
## `text` (type: `string`):
Paste a whole bibliography here: one reference per line, or references separated by blank lines. Numbered lists (\[1], 1.) whose items wrap over several lines are joined. BibTeX pasted here is read as BibTeX.
## `bibtex` (type: `string`):
BibTeX entries, for example an export from Zotero, Mendeley, JabRef or Overleaf. Entries need at least a title or a DOI.
## `pdfUrls` (type: `array`):
Direct links to PDF files whose reference section should be read and checked, for example https://arxiv.org/pdf/1706.03762. The Actor reads the text after the last "References" or "Bibliography" heading. Scanned PDFs without a text layer are not supported. Up to 20 PDFs and 500 references per PDF.
## `citationStyle` (type: `string`):
Style of the formattedCitation field and the corrected bibliography. APA and BibTeX are always included as well.
## `crossrefMailto` (type: `string`):
Crossref serves requests that include a contact email from its faster "polite" pool: 3 searches a second instead of 1. Crossref uses the address only to contact you about problems with your requests. If empty, the CROSSREF_MAILTO environment variable is used, then the slower public pool.
## `openAlexApiKey` (type: `string`):
A free key from openalex.org/settings/api. Without one, OpenAlex search shares a small daily budget with everyone on the same IP address and is often unavailable on shared servers; references that only OpenAlex indexes (many conference papers without a DOI) may then come back as not found. If empty, the OPENALEX_API_KEY environment variable is used.
## `useOpenAlexSearch` (type: `boolean`):
Turn off to use OpenAlex only for open-access data and citation counts. With it off, a reference that Crossref and DataCite do not hold is reported as not found, even though OpenAlex might have it.
## `maxReferences` (type: `integer`):
References beyond this number are not checked and not charged.
## Actor input object example
```json
{
"references": [
"LeCun, Y., Bengio, Y., & Hinton, G. (2015). Deep learning. Nature, 521(7553), 436–444.",
"Hochreiter S, Schmidhuber J. Long short-term memory. Neural Comput. 1997;9(8):1735-80.",
"10.1016/S0140-6736(97)11096-0",
"Bengio, Y., & Hinton, G. (2019). Recursive attention gating for low-resource protein folding. Nature Machine Intelligence, 1(4), 212–220."
],
"citationStyle": "apa",
"useOpenAlexSearch": true,
"maxReferences": 1000
}
```
# Actor output Schema
## `results` (type: `string`):
One row per reference: status, confidence, the fields that differ, the matched record, retraction flag, open-access link and corrected citations.
## `summary` (type: `string`):
Counts per status, the list of possibly made-up references, retracted references and mismatches.
## `bibliography` (type: `string`):
The verified, mismatched and ambiguous references as corrected citations in the chosen style, one per paragraph.
## `bibtex` (type: `string`):
The same references as a BibTeX file.
# API
You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.
## JavaScript example
```javascript
import { ApifyClient } from 'apify-client';
// Initialize the ApifyClient with your Apify API token
// Replace the '' with your token
const client = new ApifyClient({
token: '',
});
// Prepare Actor input
const input = {
"references": [
"LeCun, Y., Bengio, Y., & Hinton, G. (2015). Deep learning. Nature, 521(7553), 436–444.",
"Hochreiter S, Schmidhuber J. Long short-term memory. Neural Comput. 1997;9(8):1735-80.",
"10.1016/S0140-6736(97)11096-0",
"Bengio, Y., & Hinton, G. (2019). Recursive attention gating for low-resource protein folding. Nature Machine Intelligence, 1(4), 212–220."
]
};
// Run the Actor and wait for it to finish
const run = await client.actor("fernandosord/citation-checker-doi-validator").call(input);
// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
console.dir(item);
});
// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs
```
## Python example
```python
from apify_client import ApifyClient
# Initialize the ApifyClient with your Apify API token
# Replace '' with your token.
client = ApifyClient("")
# Prepare the Actor input
run_input = { "references": [
"LeCun, Y., Bengio, Y., & Hinton, G. (2015). Deep learning. Nature, 521(7553), 436–444.",
"Hochreiter S, Schmidhuber J. Long short-term memory. Neural Comput. 1997;9(8):1735-80.",
"10.1016/S0140-6736(97)11096-0",
"Bengio, Y., & Hinton, G. (2019). Recursive attention gating for low-resource protein folding. Nature Machine Intelligence, 1(4), 212–220.",
] }
# Run the Actor and wait for it to finish
run = client.actor("fernandosord/citation-checker-doi-validator").call(run_input=run_input)
# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
print(item)
# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start
```
## CLI example
```bash
echo '{
"references": [
"LeCun, Y., Bengio, Y., & Hinton, G. (2015). Deep learning. Nature, 521(7553), 436–444.",
"Hochreiter S, Schmidhuber J. Long short-term memory. Neural Comput. 1997;9(8):1735-80.",
"10.1016/S0140-6736(97)11096-0",
"Bengio, Y., & Hinton, G. (2019). Recursive attention gating for low-resource protein folding. Nature Machine Intelligence, 1(4), 212–220."
]
}' |
apify call fernandosord/citation-checker-doi-validator --silent --output-dataset
```
## MCP server setup
```json
{
"mcpServers": {
"apify": {
"type": "http",
"url": "https://mcp.apify.com/?tools=fetch-actor-details,fernandosord/citation-checker-doi-validator"
}
}
}
```
The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer ` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).
## OpenAPI specification
Download the OpenAPI definition: https://api.apify.com/v2/actors/Q0sERF1oMdzZRGugt/builds/YkNUP2fzartVBNsRp/openapi.json