Development – Page 2 – MetaBrainz Blog

Picard 3 alpha 2 released

A second alpha version for the upcoming MusicBrainz Picard 3 is now available. This focuses on fixing issues that were found in the previous alpha 1 as well as some minor improvements and updated translations.

Download links and a list of changes since Picard 3 alpha 1 are available below. For a more detailed overview of what is new in Picard 3 please see the previous blog post Picard 3 Alpha Release.

As before this is still an early pre-release. While we have all the major features implemented and we are rather confident in the current code, it is still a development release and it is expected there will be bugs. If you use this, do so with care, backup your files and please report any issues you encounter.

Some of the changes are also backward incompatible, hence we recommend you make a backup of your Picard.ini config file before trying the alpha version. You can do so in Picard’s Options under Advanced > Maintenance.

Thanks a lot to everyone who gave feedback, reported issues and provided translations.

Picard 3 Alpha Release

Today the Picard team is releasing an early alpha version of the long awaited major update to MusicBrainz Picard. Picard 3 has a lot of changes over the previous versions, and this is the first time we make it available for a larger audience to test.

Please be clear that this is an early alpha release. While we have all the major features implemented and we are rather confident in the current code, it is still a development release and it is expected there will be bugs. If you use this, do so with care, backup your files and please report any issues you encounter.

Below is an overview about the most significant changes and new features.

MusicBrainz Server update, 2026-01-19

Another year starts, and another MusicBrainz update that brings with it small improvements and fixes a bunch of bugs! In addition to a good amount of URL handling improvements, we have found the tables of contents for our documentation which had decided to play hide and seek over the holidays.

Additionally, we have blocked submitting tags that include commas via the API. Tags with commas were never supposed to be supported (commas are generally our tag separator character), and their existence broke in-site tag handling, but the API would until now accept them without complaints. From now on they will be rejected and you will be asked to try again without the commas.

A new release of MusicBrainz Docker is also available that matches this update of MusicBrainz Server. See the release notes for update instructions.

Thanks to helpimnotdrowning, kellnerd, Shreeshanth Shetty and SuperSaltyGamer for having contributed to the code. Thanks to chaban, helpimnotdrowning, HibiscusKazeneko, ivoireshi, jesus2099, kellnerd, SuperSaltyGamer, wileyfoxyx and yomo12 for having reported bugs and suggested improvements. Thanks to -alex., Besnik, KenParker_CN, NorwayFun, Philipp Wolfer, dumbbird, gaahmua, imgradeone, liilliil, salo.rock, wileyfoxyx and yyb987 for updating the translations. And thanks to all others who tested the beta version!

The git tag is v-2026-01-19.0.

MusicBrainz Server update, 2025-12-16

We are back with one last small release before the holidays, which mostly improves URL handling, fixing some broken cleanups and allowing linking to a few new databases. We are also including one small new feature, allowing to browse events by series in the API (to get, for example, all the concerts in a tour in one go). And finally, recording and release group edits entered while editing a release will now also indicate the release they were entered from, mirroring the feature that we recently added for the relationship editor.

A new release of MusicBrainz Docker is also available that matches this update of MusicBrainz Server. See the release notes for update instructions.

Thanks to Jim DeLaHunt and owlpharoah for having contributed to the code. Thanks to Anesidora, Aszazin, dvirtz, fabi123, finalsummer, Griomo, Raman Sinclair, Relaxo5, sanojjonas, yindesu and xodus for having reported bugs and suggested improvements. Thanks to Avava_Ava, Besnik, Echelon, GABG, LeoVallejo, Pioneers, kKZvtcqX, karpuzikov, mfmeulenbelt, miausalvaje, salo.rock, wileyfoxyx and yyb987 for updating the translations. And thanks to all others who tested the beta version!

The git tag is v-2025-12-16.0.

We can’t have nice things… because of AI scrapers

In the past few months the MetaBrainz team has been fighting a battle against unscrupulous AI companies ignoring common courtesies (such as robots.txt) and scraping the Internet in order to build up their AI models. Rather than downloading our dataset in one complete download, they insist on loading all of MusicBrainz one page at a time. This of course would take hundreds of years to complete and is utterly pointless. In doing so, they are overloading our servers and preventing legitimate users from accessing our site.

Now the AI scrapers have found ListenBrainz and are hitting a number of our API endpoints for their nefarious data gathering purposes. In order to protect our services from becoming overloaded, we’ve made the following changes:

The /metadata/lookup API endpoints (GET and POST versions) now require the caller to send an Authorization token in order for this endpoint to work.
The ListenBrainz Labs API endpoints for mbid-mapping, mbid-mapping-release and mbid-mapping-explain have been removed. Those were always intended for debugging purposes and will also soon be replaced with a new endpoints for our upcoming improved mapper.
LB Radio will now require users to be logged in to use it (and API endpoint users will need to send the Authorization header). The error message for logged in users is a bit clunky at the moment; we’ll fix this once we’ve finished the work for this year’s Year in Music.

Sorry for these hassles and no-notice changes, but they were required in order to keep our services functioning at an acceptable level.

MusicBrainz Server update, 2025-11-03

For this release we have a bunch of URL improvements, a couple of bug fixes (including one which was causing broken cover art reorder edits), and some progress in the React conversion. Additionally, address verification emails will be sent with the new email service now, and look substantially nicer!

A new release of MusicBrainz Docker is also available that matches this update of MusicBrainz Server. See the release notes for update instructions.

Thanks to dvirtz, Jade Ellis, jesus2099 and owlpharoah for having contributed to the code. Thanks to dvirtz, Freso, Jade Ellis, jesus2099, nope, practik, Time Dilation and zabey for having reported bugs and suggested improvements. Thanks to Besnik, craftersmine, Dino RTX, Echelon, hamaryns, KenParker_CN, salo.rock, Vaclovas Intas, vacuousVersifier, wileyfoxyx and yyb987 for updating the translations. And thanks to all others who tested the beta version!

The git tag is v-2025-11-03.0.

MusicBrainz Server update, 2025-10-13

Do you remember us? Late Summer and then our September summit has meant again a long break between releases – hopefully we’ll get back to a more consistent update schedule soon (releasing at least once a month if not biweekly).

Other than fixing a bunch of bugs, this release includes one significant new feature and a few noticeable improvements.

It’s now possible to use an API browse query to get all sub-events of a specific event. This means you can get all the events that are part of a specific festival: for example, all events from Wacken 2024 (and the same query including artist and event relationships).

When entering edits from the release relationship editor, the edit will include information about the release it was entered from (no more wondering about which release’s cover art that “See cover art” edit note refers to!).

After not running any captchas for a couple years since we turned off Google’s reCAPTCHA in 2023, we are now running MTCaptcha, a GDPR-compliant captcha. Hopefully this will limit the amount of spammers a bit.

Additionally, you can now select the language you want to receive emails in from your user preferences. This only affects emails that are using our new email service; for now, that is just messages sent to you by other editors.

A new release of MusicBrainz Docker is also available that matches this update of MusicBrainz Server. See the release notes for update instructions.

Thanks to dvirtz and Piper McCorkle for having contributed to the code. Thanks to angriestchair, chaban, dvirtz, Jade, KenParker_CN, Muxxer, Piper McCorkle, RandomMushroom128, Relaxo5, rinsuki, sanojjonas and yindesu for having reported bugs and suggested improvements. Thanks to aboettger, Beteix, djdhsjhshsh, Echelon, erykmichalak, KenParker_CN, Languages add-on, Libra, Ljcbaby, Manuela Silva, matecik, Metafono, mfmeulenbelt, MoeCaa, nitzanakrai, Philipp Wolfer, Poesty Li, Puyol, robertgarrigos, salo.rock, TefWw, tuba56, Vaclovas Intas, vacuousVersifier, vimutti, wileyfoxyx, yyb987 and לוכסן for updating the translations. And thanks to all others who tested the beta version!

The git tag is v-2025-10-13.0.

MusicBrainz Server update, 2025-08-11

This release includes several often-requested improvements and bugfixes, such as better guess casing for English contractions, events being sorted by most recent first, place areas being shown properly in search results again, and the label filter feature actually working at all. It also includes a fair amount of minor improvements, such as updated country flags, new and fixed URL support, and a few more locales for aliases. There’s also two new reports to help find and improve incorrect dates for digital releases and incorrect or missing primary aliases for artists and labels.

We are adding a script to delete accounts that have been around for a year yet have no activity and no verified email address. This mostly affects spam accounts, and its first run deleted several hundred thousand of those. If you’ve been wondering why our user count suddenly dropped, this is the main reason.

A new release of MusicBrainz Docker is also available that matches this update of MusicBrainz Server. See the release notes for update instructions.

Thanks to outsidecontext for having contributed to the code. Thanks to chaban, Deniz C, diskotechjam, emptybrainz, HibiscusKazeneko, jesus2099, Lotheric, Paul Taylor, sammyrayy, silentbird, vexxed, voiceinsideyou and yindesu for having reported bugs and suggested improvements. Thanks to Beteix, Early6431, Echelon, hocu, imgradeone, invalidCards, Libra, ninjum, nzure, Othon19, ROManceJP, sut, TefWw, wileyfoxyx, yyb987, לוכסן and 奶油糖派 for updating the translations. And thanks to all others who tested the beta version!

The git tag is v-2025-08-11.0.

New release python-discid 1.3.0

A new version of python-discid, a Python wrapper library for libdiscid, is now available. Version 1.3.0 is a maintenance release, ensuring this small library stays available on modern systems.

python-discid was originally implemented and maintained by Johannes Dewender (aka jonnyJD), who also maintained the libdiscid library at the time. We have now moved the project over to be part of MetaBrainz and the source code is now on https://github.com/metabrainz/python-discid/ . Thanks Johannes for supporting this move.

Despite the project move one important change is the updated build system, which now allows building with any PEP 518 compatible build tool. Also support for Python 2 was dropped, the new minimal Python version supported is Python 3.9. For a full change log see the changelog in the documentation.

The new version is available on PyPI. See also the install instructions for more options.

MusicBrainz Server update, 2025-06-23

We’re back with another small release which mostly fixes a few bugs and adds support for more types of URLs (including some for streaming podcasts).

Additionally, starting from this release, an alias cannot be both marked as ended and as primary for its locale. Since the primary flag is supposed to represent the most appropriate alias to use, it should only be used for current aliases anyway, so setting an alias as ended will unset the primary flag. A one-off script was run to unset the currently set primary flags on ended aliases.

A new release of MusicBrainz Docker is also available that matches this update of MusicBrainz Server. See the release notes for update instructions.

For mirror owners, after last month’s search upgrade, the transition period to switch to Solr 9 will come to an end by the end of the week. That is, the latest Solr 7 search index dumps will be made available on Saturday, 28 June 2025. After that, only the Solr 9 collection backups will be updated.

Thanks to dvirtz for having contributed to the code. Thanks to beckanhaf, chaban, diskotechjam, dvirtz, M18hellcat, UltimateRiff, yindesu and yyb987 for having reported bugs and suggested improvements. Thanks to Echelon, KiszolgalMotozas0n, mfmeulenbelt, MoeCaa, NorwayFun, roinujnosde, salo.rock, senhordaluz, silentbird, Solarenta, Vaclovas Intas, wileyfoxyx and yyb987 for updating the translations. And thanks to all others who tested the beta version!

The git tag is v-2025-06-23.0.