generated: '2026-08-12'
method: searched
source: https://open-docs.flashexpress.com/#demo-download
note: >-
  Flash Express publishes no client library on any public package registry. npm, PyPI,
  RubyGems and a GitHub code search were all checked and returned nothing first-party
  (the only npm hit, "flashexpress-ui", is an unrelated third-party Vue component library
  published by an individual account; every GitHub match is a third-party or unrelated
  project). What Flash Express does distribute first-party is four downloadable reference
  client implementations — C#, PHP, Java and Python — served as ZIP archives directly from
  the developer documentation host under the "Demo Download" section. These are sample
  clients that implement the SHA256 signature scheme and the order-creation call rather
  than versioned, dependency-managed SDKs, so they have no registry metadata endpoint to
  query. Only the C# archive carries a version in its filename; the other three filenames
  are unpinned and float to whatever the docs host currently serves, which means a consumer
  cannot tell which build they are getting either. Each ZIP was fetched and confirmed to be
  a real archive (PK magic bytes, application/zip) on 2026-08-12.
packages:
- language: csharp
  registry: direct
  name: CSharpDemo
  url: https://open-docs.flashexpress.com/download/CSharpDemo_v1.1.0.zip
  install: Download and unzip CSharpDemo_v1.1.0.zip from the Flash Express docs host
  official: true
  kind: reference-client
  version: 1.1.0
  published: null
  size_bytes: 212943
  note: >-
    Version read from the pinned filename (CSharpDemo_v1.1.0.zip). No registry metadata
    endpoint exists for a direct-download ZIP, so no publication date is available.
- language: java
  registry: direct
  name: flash-open-api-demo
  url: https://open-docs.flashexpress.com/download/flash-open-api-demo.zip
  install: Download and unzip flash-open-api-demo.zip from the Flash Express docs host
  official: true
  kind: reference-client
  version: null
  published: null
  size_bytes: 38191
  note: >-
    Checked, nothing to record. The download URL is unpinned and carries no version, and
    the archive is not published to Maven Central or any other registry, so there is no
    version metadata to read.
- language: php
  registry: direct
  name: flashDemo.php
  url: https://open-docs.flashexpress.com/download/flashDemo.php.zip
  install: Download and unzip flashDemo.php.zip from the Flash Express docs host
  official: true
  kind: reference-client
  version: null
  published: null
  size_bytes: 2951
  note: >-
    Checked, nothing to record. Unpinned download URL, not published to Packagist, so no
    version or publication date is available.
- language: python
  registry: direct
  name: python_order_demo.py
  url: https://open-docs.flashexpress.com/download/python_order_demo.py.zip
  install: Download and unzip python_order_demo.py.zip from the Flash Express docs host
  official: true
  kind: reference-client
  version: null
  published: null
  size_bytes: 2019
  note: >-
    Checked, nothing to record. Unpinned download URL, not published to PyPI (pypi.org
    returned "Not Found" for flashexpress), so no version or publication date is available.
registries_checked:
- registry: npm
  query: flashexpress
  first_party_result: false
  note: 1 unrelated third-party result (flashexpress-ui, last published 2020-07-28)
- registry: pypi
  query: flashexpress
  first_party_result: false
  note: HTTP 404 Not Found
- registry: rubygems
  query: flashexpress
  first_party_result: false
  note: empty result set
- registry: github
  query: flashexpress in:name,description
  first_party_result: false
  note: 11 results, none owned by Flash Express; no first-party GitHub organization found
summary:
  package_count: 4
  official_count: 4
  registry_published_count: 0
  languages: [csharp, java, php, python]