generated: '2026-08-13' method: searched source: >- https://github.com/NeverBounce (first-party org) plus registry metadata endpoints: registry.npmjs.org, pypi.org/pypi/*/json, rubygems.org/api/v1/gems/*.json, repo.packagist.org/p2/*, search.maven.org, proxy.golang.org, azuresearch-usnc.nuget.org docs: https://developers.neverbounce.com/reference/getting-started summary: official_count: 9 third_party_count: 3 registries: - npm - pypi - rubygems - packagist - maven - go note: >- NeverBounce's own getting-started page names Node.js, Java, .NET and Python as the supported SDKs. Only the Node.js and Ruby libraries have shipped a release since 2021; the PHP, Python, Java, Go and .NET clients have not been published to a registry in four to six years, which is the clearest decay signal on this provider. The single most recent first-party release is not an SDK at all — it is the n8n community node (2026-02-17), maintained from @zoominfo.com accounts, which is where the team's integration effort is now going. github_org: https://github.com/NeverBounce github_org_repo_count: 11 packages: - name: neverbounce registry: npm url: https://www.npmjs.com/package/neverbounce repository: https://github.com/NeverBounce/NeverBounceApi-NodeJS language: javascript official: true version: 5.0.5 published: '2025-05-12' note: >- Current first-party SDK. v5 was rewritten in TypeScript, moved to ES Modules and the Fetch API, and requires Node.js 18+. Server-side only — NeverBounce documents that the standard API must not be called from a browser. - name: neverbounce-api registry: rubygems url: https://rubygems.org/gems/neverbounce-api repository: https://github.com/NeverBounce/NeverBounceApi-Ruby language: ruby official: true version: 1.2.1 published: '2025-11-13' note: The official Ruby wrapper for the v4 API. Most recently released first-party client. - name: neverbounce/neverbounce-php registry: packagist url: https://packagist.org/packages/neverbounce/neverbounce-php repository: https://github.com/NeverBounce/NeverBounceAPI-PHP language: php official: true version: v4.5.0 published: '2020-08-03' note: >- Last Packagist release 2020-08-03; the GitHub repository has commits as recent as 2023-11-27 that were never tagged to a release. - name: neverbounce-sdk registry: pypi url: https://pypi.org/project/neverbounce-sdk/ repository: https://github.com/NeverBounce/NeverBounceApi-Python language: python official: true version: 4.3.0 published: '2020-08-05' note: Official Python SDK. No release in six years. - name: com.neverbounce:neverbounce-api-java registry: maven url: https://central.sonatype.com/artifact/com.neverbounce/neverbounce-api-java repository: https://github.com/NeverBounce/NeverBounceApi-Java language: java official: true version: 4.0.15 published: '2020-11-11' note: Published under the com.neverbounce group id, so first-party. No release since 2020. - name: github.com/NeverBounce/NeverBounceApi-Go registry: go url: https://pkg.go.dev/github.com/NeverBounce/NeverBounceApi-Go repository: https://github.com/NeverBounce/NeverBounceApi-Go language: go official: true version: v0.0.0-20210719183823-e6b7873134ae published: '2021-07-19' note: >- Never tagged a semantic version — the Go module proxy only resolves a pseudo-version from the last commit (2021-07-19). - name: NeverBounceApi-DotNet registry: null url: https://github.com/NeverBounce/NeverBounceApi-DotNet repository: https://github.com/NeverBounce/NeverBounceApi-DotNet language: csharp official: true version: null published: null note: >- First-party .NET client exists as a GitHub repository (last push 2023-07-04) but is not published to nuget.org under a NeverBounce-owned account. Checked azuresearch-usnc.nuget.org: every `NeverBounce*` package on NuGet is authored by a third party (Joel Christner, Mike Mollick, Hymma). Recorded null rather than guessed. - name: neverbounce-cli registry: rubygems url: https://rubygems.org/gems/neverbounce-cli repository: https://github.com/NeverBounce/NeverBounceCli-Ruby language: ruby official: true version: 1.1.0 published: '2020-02-21' note: >- "The official NeverBounce CLI written in Ruby" — the binary that backs cli/neverbounce-cli.yml. No release in six years; source repo last pushed 2021-01-11. - name: n8n-nodes-neverbounce-email-verification registry: npm url: https://www.npmjs.com/package/n8n-nodes-neverbounce-email-verification repository: https://github.com/NeverBounce/n8n-nodes-neverbounce language: javascript official: true version: 1.0.20 published: '2026-02-17' category: workflow-node note: >- First-party n8n community node — package author is "NeverBounce ", the repository sits in the NeverBounce GitHub org, and both npm maintainers hold @zoominfo.com addresses. Not an SDK, but the most recently published first-party artifact by five years. - name: NeverBounce/neverbounce-laravel registry: null url: https://github.com/NeverBounce/neverbounce-laravel repository: https://github.com/NeverBounce/neverbounce-laravel language: php official: true version: null published: null note: >- Laravel integration in the first-party org, last pushed 2016-06-06 and never published to Packagist under the neverbounce vendor. Recorded null — checked, nothing to record. third_party: - name: NeverBounce.SDK registry: nuget url: https://www.nuget.org/packages/NeverBounce.SDK language: csharp official: false version: 4.2.0 published: null note: >- Community .NET SDK by Mike Mollick, not published by NeverBounce. Version read from the NuGet search index; publish date not recorded by that endpoint for this package. - name: NeverBounce registry: nuget url: https://www.nuget.org/packages/NeverBounce language: csharp official: false version: 1.0.6 published: '2026-01-15' note: Community wrapper by Joel Christner (github.com/jchristn/NeverBounce). - name: neverbounce registry: pypi url: https://pypi.org/project/neverbounce/ language: python official: false version: 0.2.0 published: '2016-11-12' note: >- Community package by Martin Kosír targeting the legacy API. Not to be confused with the official `neverbounce-sdk`.