generated: '2026-08-13'
method: searched
source: >-
  registry.npmjs.org, proxy.golang.org, pypi.org, github.com/customeros — probed 2026-08-13
description: >-
  CustomerOS publishes no client SDK for its own REST or GraphQL API in any language. What it does
  publish are two installable Go tools (mailsherpa, mailwatcher) and two npm packages left over from
  the Openline era. Nothing here wraps the CustomerOS API, so `official: true` is recorded where the
  publisher is first-party, but `api_client: false` is recorded on every entry — the distinction
  matters, because a first-party package is not the same thing as a first-party API client.
packages:
- language: go
  registry: pkg.go.dev
  name: github.com/customeros/mailsherpa
  url: https://pkg.go.dev/github.com/customeros/mailsherpa
  repository: https://github.com/customeros/mailsherpa
  install: go install github.com/customeros/mailsherpa@latest
  official: true
  api_client: false
  version: v0.3.9
  published: '2025-03-10'
  description: >-
    CLI and Go library that verifies whether an email address is deliverable, over SMTP, without
    sending an email. Standalone tool; it does not call the CustomerOS API.
- language: go
  registry: pkg.go.dev
  name: github.com/customeros/mailwatcher
  url: https://pkg.go.dev/github.com/customeros/mailwatcher
  repository: https://github.com/customeros/mailwatcher
  install: go install github.com/customeros/mailwatcher@latest
  official: true
  api_client: false
  version: v0.1.6
  published: '2024-12-07'
  description: Monitors the reputation of email domains and IPs. Standalone tool.
- language: javascript
  registry: npm
  name: '@openline-ai/openline-web-chat'
  url: https://www.npmjs.com/package/@openline-ai/openline-web-chat
  repository: https://github.com/openline-ai/openline-web-chat
  install: npm install @openline-ai/openline-web-chat
  official: true
  api_client: false
  legacy: true
  version: 1.3.9
  published: '2023-02-15'
  description: >-
    Openline-era embeddable web chat widget. Last published 2023-02-15, more than three years before
    this probe, and the publishing GitHub organization (openline-ai) no longer exists — it now 404s
    and its repositories redirect to github.com/customeros. Recorded as abandoned.
- language: javascript
  registry: npm
  name: '@openline-ai/ui-kit'
  url: https://www.npmjs.com/package/@openline-ai/ui-kit
  repository: https://github.com/openline-ai/openline-ui-kit
  install: npm install @openline-ai/ui-kit
  official: true
  api_client: false
  legacy: true
  version: 1.3.1
  published: '2023-05-05'
  description: >-
    Openline-era React UI kit. Last published 2023-05-05; npm description is still the literal
    string "TODO". Recorded as abandoned, same organization as above.
absent:
- {registry: pypi, query: customeros, status: 404}
- {registry: npm, query: '@customeros', result: no packages under this scope}
- {registry: npm, query: customeros, result: no first-party matches}
currency_finding: >-
  Every first-party package CustomerOS publishes predates the API it would have to wrap. The newest
  is mailsherpa v0.3.9 from 2025-03-10; the two npm packages are from 2023 and were published by an
  organization that has since been deleted. No package was published in the twelve months before
  this probe.