generated: '2026-08-13'
method: searched
source: >-
  https://github.com/Stannp (first-party GitHub organization) plus registry
  metadata endpoints: repo.packagist.org, proxy.golang.org, registry.npmjs.org,
  pypi.org, rubygems.org, azuresearch-usnc.nuget.org
note: >-
  Stannp maintains three first-party client libraries in its own GitHub
  organization (PHP, Go, C#). Only the PHP library is published to a package
  registry (Packagist); the Go library is consumable through the Go module proxy
  by repository path; the C# library is source-only with no NuGet package (a
  NuGet search for "stannp" returns zero hits). All three carry a last-release /
  last-push date of 2017-2022, which predates the current documented API surface
  (SMS, Selections, Files, Reporting, Addresses, QR/PDF tools and idempotency
  keys are all documented at
  https://www.stannp.com/us/direct-mail-api/guide but absent from the SDKs).
  Recorded as a currency signal, not as a judgement of the running API.
packages:
  - language: php
    registry: packagist
    name: stannp/stannp-php
    url: https://packagist.org/packages/stannp/stannp-php
    repository: https://github.com/Stannp/stannp-php
    install: composer require stannp/stannp-php
    official: true
    version: v0.1.5
    published: '2022-03-09'
    license: MIT
    note: >-
      First-party: composer.json authors lists Nathan Wright
      <nathan@stannp.com>. Six published versions; latest v0.1.5 (2022-03-09).
  - language: go
    registry: go-modules
    name: github.com/stannp/stannp-go
    url: https://pkg.go.dev/github.com/stannp/stannp-go
    repository: https://github.com/Stannp/stannp-go
    install: go get github.com/stannp/stannp-go
    official: true
    version: v0.0.0-20170216164327-23fbd1b332d7
    published: '2017-02-16'
    note: >-
      No semver tags exist, so the Go module proxy resolves only a pseudo-version
      pinned to the single 2017 commit (proxy.golang.org/@latest confirms
      2017-02-16T16:43:27Z). `@v/list` returns empty — there is no tagged
      release.
  - language: csharp
    registry: null
    name: Stannp/stannp-c-sharp
    url: https://github.com/Stannp/stannp-c-sharp
    repository: https://github.com/Stannp/stannp-c-sharp
    install: git clone https://github.com/Stannp/stannp-c-sharp
    official: true
    version: null
    published: '2017-02-16'
    note: >-
      Source-only. Checked, nothing to record: no NuGet package exists — a
      package search for "stannp" on azuresearch-usnc.nuget.org returns
      totalHits 0, and the repository carries no tags. `published` is the last
      push to the repository, which is the only dated artifact available.
community_packages:
  - language: python
    registry: pypi
    name: stannp
    url: https://pypi.org/project/stannp/
    repository: https://github.com/andy-pi/stannp-api
    official: false
    version: 1.0.0
    published: '2018-03-07'
    note: Third-party wrapper by "AndyPi"; not published or endorsed by Stannp.
  - language: ruby
    registry: rubygems
    name: stannp
    url: https://rubygems.org/gems/stannp
    official: false
    version: 0.8.0
    published: '2022-05-04'
    note: Third-party wrapper by "k-p-jones"; not published or endorsed by Stannp.
  - language: javascript
    registry: npm
    name: '@pipedream/stannp'
    url: https://www.npmjs.com/package/@pipedream/stannp
    official: false
    version: 0.3.0
    published: '2026-05-15'
    note: >-
      Pipedream's platform connector, not a Stannp SDK. No first-party Stannp
      package exists on npm — `stannp`, `stannp-api`, `stannp-node`,
      `@stannp/sdk` and `stannp-js` were all probed.
languages_without_a_library:
  - javascript
  - python
  - ruby
  - java
docs:
  code_samples: >-
    The API reference at https://www.stannp.com/us/direct-mail-api/guide renders
    every example in cURL, PHP, Python and C# (RestSharp), so Python has
    documented samples but no first-party library.