generated: '2026-09-17'
method: searched
source: >-
  registry.npmjs.org, pypi.org, rubygems.org, api.nuget.org, search.maven.org,
  repo.packagist.org, crates.io, proxy.golang.org, and
  https://developer.atlassian.com/cloud/trello/guides/client-js/getting-started-with-client-js/
description: >-
  Client libraries for the Trello REST API. THE HEADLINE FINDING IS THE ABSENCE:
  Atlassian publishes exactly one first-party Trello client library — client.js, a
  browser-only jQuery-dependent wrapper served from the API host itself at
  https://api.trello.com/1/client.js. There is no first-party Trello SDK on npm,
  PyPI, RubyGems, NuGet, Maven Central, Packagist, crates.io or the Go module proxy.
  Every server-side language binding below is community-maintained, and most of them
  have not shipped a release since before Trello's OAuth 2.0 3LO launch (15 September
  2026) — so none of them speaks the current authorization system.
summary:
  official_count: 2
  community_count: 10
  official_registry_published: 0
  note: >-
    The single official library is CDN/host-distributed, not registry-distributed,
    and it is unversioned at its URL — a consumer cannot pin it or tell what they
    are getting.
packages:
  - name: client.js
    language: javascript
    official: true
    registry: cdn
    url: https://api.trello.com/1/client.js
    docs: https://developer.atlassian.com/cloud/trello/guides/client-js/client-js-reference/
    getting_started: https://developer.atlassian.com/cloud/trello/guides/client-js/getting-started-with-client-js/
    install: '<script src="https://api.trello.com/1/client.js?key={APIKey}"></script>'
    version: null
    published: null
    note: >-
      Checked 2026-09-17, HTTP 200, 5,891 bytes. First-party Atlassian library, but the
      distribution URL carries no version segment and no CDN metadata endpoint exists
      for it, so the version floats to whatever Trello is serving. That unpinnability
      is itself the finding: a consumer has no way to know which build they loaded.
      Requires jQuery 3.x as a peer dependency. Browser-only — there is no server-side
      first-party equivalent.
  - name: power-up.js (Power-Up client library)
    language: javascript
    official: true
    registry: cdn
    url: https://p.trellocdn.com/power-up.min.js
    docs: https://developer.atlassian.com/cloud/trello/power-ups/client-library/
    install: '<script src="https://p.trellocdn.com/power-up.min.js"></script>'
    version: null
    published: null
    note: >-
      Checked 2026-09-17, HTTP 200, 353,679 bytes minified (862,654 unminified at
      /power-up.js). First-party iframe-bridge library for Trello Power-Ups, not a REST
      client. Same unpinned-CDN problem as client.js — no version in the URL, no
      registry metadata endpoint, so version and publish date are unknowable.
  - name: trello
    language: javascript
    official: false
    registry: npm
    url: https://www.npmjs.com/package/trello
    repository: https://github.com/norberteder/trello
    version: 0.11.0
    published: '2021-11-10'
    note: Community wrapper. Last release predates OAuth 2.0 3LO by nearly five years.
  - name: trello.js
    language: typescript
    official: false
    registry: npm
    url: https://www.npmjs.com/package/trello.js
    repository: https://github.com/MrRefactoring/trello.js
    version: 2.2.0
    published: '2026-08-20'
    note: >-
      The most currently maintained community binding found. Type-safe, ESM-only,
      Zod-validated. Still predates the 15 September 2026 OAuth 2.0 3LO GA by four weeks.
  - name: node-trello
    language: javascript
    official: false
    registry: npm
    url: https://www.npmjs.com/package/node-trello
    repository: https://github.com/adunkman/node-trello
    version: 1.3.0
    published: '2017-08-22'
    note: Community wrapper, effectively abandoned - no release in nine years.
  - name: trello-powerup
    language: typescript
    official: false
    registry: npm
    url: https://www.npmjs.com/package/trello-powerup
    version: 1.0.1
    published: '2025-01-10'
    note: Community TypeScript typings/SDK for building Power-Ups. Not Atlassian-published.
  - name: py-trello
    language: python
    official: false
    registry: pypi
    url: https://pypi.org/project/py-trello/
    version: 0.20.1
    published: '2024-06-11'
    note: The de-facto Python binding. Community-maintained; no OAuth 2.0 3LO support.
  - name: ruby-trello
    language: ruby
    official: false
    registry: rubygems
    url: https://rubygems.org/gems/ruby-trello
    repository: https://github.com/jeremytregunna/ruby-trello
    version: 4.2.0
    published: '2023-12-21'
    note: Community Ruby binding.
  - name: TrelloDotNet
    language: dotnet
    official: false
    registry: nuget
    url: https://www.nuget.org/packages/TrelloDotNet
    version: 2.8.4
    published: '2026-09-16'
    note: >-
      The single most actively maintained community binding in any language - released
      the day before this probe, and one day after Trello's OAuth 2.0 3LO GA.
  - name: com.julienvey.trello:trello-java-wrapper
    language: java
    official: false
    registry: maven
    url: https://search.maven.org/artifact/com.julienvey.trello/trello-java-wrapper
    version: 0.3.2
    published: '2015-09-30'
    note: Only Java binding on Maven Central with any traction. Eleven years stale.
  - name: github.com/adlio/trello
    language: go
    official: false
    registry: gomodules
    url: https://pkg.go.dev/github.com/adlio/trello
    repository: https://github.com/adlio/trello
    version: v1.12.0
    published: '2024-04-15'
    note: Community Go binding.
  - name: stevenmaguire/trello-php
    language: php
    official: false
    registry: packagist
    url: https://packagist.org/packages/stevenmaguire/trello-php
    version: 1.0.0
    published: '2022-10-27'
    note: Community PHP binding.