# \#xml\_api **URL:** https://community.crossref.org/tag/xml-api/143.md [Latest](https://community.crossref.org/latest.md) · [Categories](https://community.crossref.org/categories.md) · [Tags](https://community.crossref.org/tags.md) --- ## [Crossref not working and sometimes slowness](https://community.crossref.org/t/crossref-not-working-and-sometimes-slowness/15159)
**Author:** [@perumal](https://community.crossref.org/u/perumal)\ **Replies:** 5\ **Last updated:** [21 April 2026 21:57 UTC](https://community.crossref.org/t/crossref-not-working-and-sometimes-slowness/15159 "2026-04-21T21:57:20Z")
Hi Team, We are using Paid(lisence) XML API method. From today afternoon india time after 12 to 1 PM Crossref XML API method not working properly and sometimes very slow. If any updates going on. Kindly check and let us… --- ## [UNIXREF XML API inserting incorrect whitespace between HTML-like elements](https://community.crossref.org/t/unixref-xml-api-inserting-incorrect-whitespace-between-html-like-elements/14539)
**Author:** [@castedo](https://community.crossref.org/u/castedo)\ **Replies:** 4\ **Last updated:** [19 March 2026 15:12 UTC](https://community.crossref.org/t/unixref-xml-api-inserting-incorrect-whitespace-between-html-like-elements/14539 "2026-03-19T15:12:18Z")
This topic is related to topic #14533 which is a question specifically about the REST JSON API. My question here is specifically about a different problem in the UNIXREF XML API, as used by Zotero, via the HTTP endpoint… --- ## [Fetching reindexed works](https://community.crossref.org/t/fetching-reindexed-works/14322)
**Author:** [@abeechin](https://community.crossref.org/u/abeechin)\ **Replies:** 9\ **Last updated:** [18 August 2025 15:46 UTC](https://community.crossref.org/t/fetching-reindexed-works/14322 "2025-08-18T15:46:09Z")
Hello and first a note of solidarity to your tech team with the ongoing issues in the API - we appreciate their efforts to resolve things! :slight\_smile: For the reindexed works, will this affect their “deposit-date“ at… --- ## [Seeing data for pending publications](https://community.crossref.org/t/seeing-data-for-pending-publications/14226)
**Author:** [@mklem](https://community.crossref.org/u/mklem)\ **Replies:** 2\ **Last updated:** [31 July 2025 17:20 UTC](https://community.crossref.org/t/seeing-data-for-pending-publications/14226 "2025-07-31T17:20:41Z")
When we submit data as a pending publication, how can we see that data? The API https://api.crossref.org/works/${DOI} does not show it. --- ## [Crossref XML API method](https://community.crossref.org/t/crossref-xml-api-method/14113)
**Author:** [@perumal](https://community.crossref.org/u/perumal)\ **Replies:** 1\ **Last updated:** [10 July 2025 13:27 UTC](https://community.crossref.org/t/crossref-xml-api-method/14113 "2025-07-10T13:27:46Z")
Hi Team, Crossref XML API Method issues now resolved after cloud Maintenance? If not please let us know when resolved? Thanks, Perumal N. --- ## [Querying citations via API](https://community.crossref.org/t/querying-citations-via-api/13454)
**Author:** [@tomwagstaff-opml](https://community.crossref.org/u/tomwagstaff-opml)\ **Replies:** 7\ **Last updated:** [26 March 2025 17:48 UTC](https://community.crossref.org/t/querying-citations-via-api/13454 "2025-03-26T17:48:30Z")
Hi everyone, I’m planning to do a network analysis of some research, looking at how it has been used and how it’s located in the broader body of evidence. For that purpose, I need to retrieve data on citations i.e. I pr… --- ## [Keeping Cited-by counts current across a large corpus](https://community.crossref.org/t/keeping-cited-by-counts-current-across-a-large-corpus/12946)
**Author:** [@alarba](https://community.crossref.org/u/alarba)\ **Replies:** 8\ **Last updated:** [10 January 2025 09:27 UTC](https://community.crossref.org/t/keeping-cited-by-counts-current-across-a-large-corpus/12946 "2025-01-10T09:27:28Z")
Wondering what others are finding most effective for keeping cited-by counts up-to-date over say 500k DOIs. Main options I see are, given that you cannot check too often on most sites that get a large amount of bot traf… --- ## [Ticket of the month - February 2022 - ORCID auto-update notifications](https://community.crossref.org/t/ticket-of-the-month-february-2022-orcid-auto-update-notifications/2527)
**Author:** [@ifarley](https://community.crossref.org/u/ifarley)\ **Replies:** 1\ **Last updated:** [7 November 2022 17:01 UTC](https://community.crossref.org/t/ticket-of-the-month-february-2022-orcid-auto-update-notifications/2527 "2022-11-07T17:01:21Z")
We get many questions from contributors (e.g., authors) and members about ORCID auto-update. Sometimes contributors are expecting an auto-update notification for a DOI that was recently registered and are not receiving i… --- ## [How long is the delay when updating metadata?](https://community.crossref.org/t/how-long-is-the-delay-when-updating-metadata/12315)
**Author:** [@MTP](https://community.crossref.org/u/MTP)\ **Replies:** 2\ **Last updated:** [3 October 2024 16:32 UTC](https://community.crossref.org/t/how-long-is-the-delay-when-updating-metadata/12315 "2024-10-03T16:32:03Z")
About an hour or two ago, I successfully submitted an update to a DOI via an XML deposit. The update was the addition of a fourth editor which had accidentally been left out in the initial deposit (myself, as it happens)… --- ## [Metadata retrieval question](https://community.crossref.org/t/metadata-retrieval-question/5413)
**Author:** [@mklem](https://community.crossref.org/u/mklem)\ **Replies:** 1\ **Last updated:** [2 May 2024 20:31 UTC](https://community.crossref.org/t/metadata-retrieval-question/5413 "2024-05-02T20:31:27Z")
Hello Crossref community. When I post xml data to crossref that contains affiliations, should I expect to see the affiliation data when I retrieve the same doi? I am using this url to retrieve the xml: http s://api.cr… --- ## [API returns no works for a DOI that does resolve](https://community.crossref.org/t/api-returns-no-works-for-a-doi-that-does-resolve/3443)
**Author:** [@ajt\_muse](https://community.crossref.org/u/ajt_muse)\ **Replies:** 5\ **Last updated:** [17 April 2024 19:11 UTC](https://community.crossref.org/t/api-returns-no-works-for-a-doi-that-does-resolve/3443 "2024-04-17T19:11:48Z")
Hi - I am seeing a few cases where I do an API works query that returns no results for a DOI that does resolve to a URL. I tried to post the actual URLs but it is not allowing any links in the post. DOIs pattern are: 1… --- ## [Impossible to get the 10.3389/fmars.2024.1347990 metadata](https://community.crossref.org/t/impossible-to-get-the-10-3389-fmars-2024-1347990-metadata/5137)
**Author:** [@fmerceur](https://community.crossref.org/u/fmerceur)\ **Replies:** 1\ **Last updated:** [26 March 2024 15:10 UTC](https://community.crossref.org/t/impossible-to-get-the-10-3389-fmars-2024-1347990-metadata/5137 "2024-03-26T15:10:00Z")
Hello, I can’t get the metadata of the 10.3389/fmars.2024.1347990 DOI : api crossref org works 10.3389/fmars.2024.1347990 → no ressource found Is there a problem with this article ? How does it work ? As soon as… --- ## [Article titles missing from API](https://community.crossref.org/t/article-titles-missing-from-api/5039)
**Author:** [@bms](https://community.crossref.org/u/bms)\ **Replies:** 8\ **Last updated:** [4 March 2024 21:53 UTC](https://community.crossref.org/t/article-titles-missing-from-api/5039 "2024-03-04T21:53:07Z")
We’re coming across many DOIs that are missing titles of the articles. Do you have a suggestion for handling this? Here are some examples: 10.1023/a:1016128715865 10.1002/job.v45.2 10.1023/a:1008061017938 10.1023/a… --- ## [DOIs are not unique...?](https://community.crossref.org/t/dois-are-not-unique/4473)
**Author:** [@OppfinnarJocke](https://community.crossref.org/u/OppfinnarJocke)\ **Replies:** 7\ **Last updated:** [8 December 2023 21:59 UTC](https://community.crossref.org/t/dois-are-not-unique/4473 "2023-12-08T21:59:26Z")
Newbie here, I searched but could not find anything about this. If I input the following DOI into the metadata search box on the main page of CrossRef, I get over 5 million results! I expected a single one (or zero, bu… --- ## [Ticket of the month - September 2023 - A DOI-namic timeline](https://community.crossref.org/t/ticket-of-the-month-september-2023-a-doi-namic-timeline/4143)
**Author:** [@pdavis](https://community.crossref.org/u/pdavis)\ **Replies:** 0\ **Last updated:** [5 October 2023 11:20 UTC](https://community.crossref.org/t/ticket-of-the-month-september-2023-a-doi-namic-timeline/4143 "2023-10-05T11:20:54Z")
A DOI-namic timeline Where should I expect to see my DOI and when? Hello, We get a lot of questions coming into support asking why isn’t a DOI showing up in our search and metadata retrieval tools shortly after registra… --- ## [ISSN discrepancy between JSON and XML responses](https://community.crossref.org/t/issn-discrepancy-between-json-and-xml-responses/4066)
**Author:** [@abeechin](https://community.crossref.org/u/abeechin)\ **Replies:** 7\ **Last updated:** [5 October 2023 09:48 UTC](https://community.crossref.org/t/issn-discrepancy-between-json-and-xml-responses/4066 "2023-10-05T09:48:04Z")
Hello Crossref, I noticed a very minor data discrepancy relating to the ISSN of a publication between the JSON and XML endpoints. In the later the ISSN is missing the hyphen, so appears as 8 numbers together. https://a… --- ## [Public XML metadata API returns 503](https://community.crossref.org/t/public-xml-metadata-api-returns-503/3997)
**Author:** [@abeechin](https://community.crossref.org/u/abeechin)\ **Replies:** 4\ **Last updated:** [31 August 2023 16:30 UTC](https://community.crossref.org/t/public-xml-metadata-api-returns-503/3997 "2023-08-31T16:30:22Z")
Hello (again so soon!) - we’re seeing an issue with the XML public endpoint for works. It returns 503 whilst the JSON equivalent returns 200: 503: https://api.crossref.org/works/10.1080/17540054.2006.12288851/transfor… --- ## [Determining if a DOI is/has an alias and if it is locked/unlocked?](https://community.crossref.org/t/determining-if-a-doi-is-has-an-alias-and-if-it-is-locked-unlocked/3346)
**Author:** [@ajt\_muse](https://community.crossref.org/u/ajt_muse)\ **Replies:** 2\ **Last updated:** [22 February 2023 02:42 UTC](https://community.crossref.org/t/determining-if-a-doi-is-has-an-alias-and-if-it-is-locked-unlocked/3346 "2023-02-22T02:42:23Z")
Is there a programmatical way to determine if a DOI is and alias or has alias? Is there a way to determine is a DOI is locked or unlocked? Thank you. Abba --- ## [Fix for querying DOIs with non-ASCII characters](https://community.crossref.org/t/fix-for-querying-dois-with-non-ascii-characters/3040)
**Author:** [@ppolischuk](https://community.crossref.org/u/ppolischuk)\ **Replies:** 0\ **Last updated:** [18 October 2022 21:42 UTC](https://community.crossref.org/t/fix-for-querying-dois-with-non-ascii-characters/3040 "2022-10-18T21:42:44Z")
Today we released a fix for a bug that prevented users from querying for DOIs with diacritic marks. https://crossref.atlassian.net/browse/CR-776 This bug impacted 232 registered DOIs. Now, DOIs with diacritics can be … --- ## [Ticket of the month - July 2022 - Retrieving metadata records for aliased DOIs](https://community.crossref.org/t/ticket-of-the-month-july-2022-retrieving-metadata-records-for-aliased-dois/2870)
**Author:** [@ifarley](https://community.crossref.org/u/ifarley)\ **Replies:** 0\ **Last updated:** [8 August 2022 21:49 UTC](https://community.crossref.org/t/ticket-of-the-month-july-2022-retrieving-metadata-records-for-aliased-dois/2870 "2022-08-08T21:49:50Z")
Hello all, I thought this month I’d address a question that we get from time to time into support@crossref.org. The question deals with retrieving metadata records for DOIs that have been aliased to other DOIs. You can … --- ## [XML API results do not validate against the schema](https://community.crossref.org/t/xml-api-results-do-not-validate-against-the-schema/2858)
**Author:** [@ialarmedalien](https://community.crossref.org/u/ialarmedalien)\ **Replies:** 4\ **Last updated:** [4 August 2022 22:18 UTC](https://community.crossref.org/t/xml-api-results-do-not-validate-against-the-schema/2858 "2022-08-04T22:18:13Z")
doi: 10.46936/10.25585/60000611 request results as unixsd, i.e. using the schema crossref\_query\_output3.0.xsd validate results against xsd using the online validator at utilities-online.info gives the errors: Eleme… --- ## [Uploading new information in DOI](https://community.crossref.org/t/uploading-new-information-in-doi/2249)
**Author:** [@ADSingh](https://community.crossref.org/u/ADSingh)\ **Replies:** 4\ **Last updated:** [3 December 2021 01:26 UTC](https://community.crossref.org/t/uploading-new-information-in-doi/2249 "2021-12-03T01:26:08Z")
I made a new submission, the DOI was generated and now when I try to search the DOI, in https://search.crossref.org/ it returns with nothing, moreover, I am very new to crossref and learned everything, but now I want to … --- ## [Retrieving older metadata after an update](https://community.crossref.org/t/retrieving-older-metadata-after-an-update/2166)
**Author:** [@fgnievinski](https://community.crossref.org/u/fgnievinski)\ **Replies:** 2\ **Last updated:** [18 October 2021 00:18 UTC](https://community.crossref.org/t/retrieving-older-metadata-after-an-update/2166 "2021-10-18T00:18:33Z")
Hi. Is it possible to retrieve older metadata after it’s been updated, please? I’m doing: https://doi.crossref.org/servlet/query?pid=fgnievinski@gmail.com&id=10.14358/PERS.85.7.475&format=info I believe the article ti…