# Atrium

> Atrium is a sales-effectiveness and sales-performance analytics platform for revenue
> teams: it monitors sales KPIs, surfaces anomalies in rep and team performance, and
> delivers coaching recommendations to managers. Atrium was acquired by Fullcast in 2025
> and now ships as **Fullcast Performance**. Atrium has **no public developer API** — it
> integrates into Salesforce, HubSpot, data warehouses and communication tools rather than
> exposing one. This file is generated by API Evangelist from a third-party profile;
> Atrium does not serve an llms.txt of its own (every path on atriumhq.com returns HTTP 301
> to the acquirer's product page).

## Status

- Brand status: absorbed by acquirer. atriumhq.com 301s to https://www.fullcast.com/product/fullcast-performance/
- Only surviving Atrium host: https://app.atriumhq.com/auth/login (customer application login, not an API)
- No API host, docs host or developer portal resolves on atriumhq.com

## Where the API surface lives now

- Fullcast product page (successor): https://www.fullcast.com/product/fullcast-performance/
- Fullcast support / documentation: https://support.fullcast.com/performance
- Fullcast is profiled separately by API Evangelist; its Assistant API and MCP server belong to Fullcast, not to Atrium.

## APIs

- None published.

## Specs

- None published. No OpenAPI, AsyncAPI, GraphQL SDL, agent card or MCP server was found on any Atrium host.

## Profile artifacts (API Evangelist)

- Profile: https://raw.githubusercontent.com/api-evangelist/atrium/refs/heads/main/apis.yml
- Lifecycle (acquisition + redirect evidence): lifecycle/atrium-lifecycle.yml
- Well-known probe (all absences): well-known/atrium-well-known.yml
- Domain security probe: security/atrium-domain-security.yml
- Packages (zero, with namesake warning): packages/atrium-packages.yml

## Disambiguation

- "Atrium API" in search results usually means the **MX Atrium API** (docs.mx.com), a financial-data aggregation API by MX. It is a different company.
- `atriumsports-sdk` on PyPI belongs to **Atrium Sports**, also a different company.