Changelog

Aerion now has a new developer platform. We shipped an official MCP server so AI assistants can read and act on your Aerion data through natural language, and we rebuilt our API documentation from the ground up — new structure, real model descriptions, search, and dark mode.

Aerion MCP server

Your AI models and agents can now use our official MCP server to access your Aerion data in a simple and secure way.

The server exposes Find, Create, Update, and Delete tools for all core models — projects, tasks, time entries, clients, users, invoices, and the rest — plus customized Project and User analytics feeds for the questions you'd otherwise build a report for. Ask an assistant who's over budget this month, have it log time against the right task, or spin up a project from a quick brief.

We follow the authenticated remote MCP spec, so the server is centrally hosted and managed at https://cloud.aerion.app/mcp. Authentication uses OAuth — the first time you connect, your client opens a browser window where you sign in to your Aerion tenant. The server respects the exact same permissions as the rest of the Aerion API: it acts as the signed-in user and can only see or change what that user can. For destructive workflows, connect with a utility user scoped to the access you actually need.

Connect it natively as a custom connector in Claude, or drop the same entry into Cursor, VS Code, Codex, and other clients:

{
  "mcpServers": {
    "aerion": {
      "url": "https://cloud.aerion.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "aerion": {
      "url": "https://cloud.aerion.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "aerion": {
      "url": "https://cloud.aerion.app/mcp"
    }
  }
}

{
  "mcpServers": {
    "aerion": {
      "url": "https://cloud.aerion.app/mcp"
    }
  }
}

MCP is built for interactive use through an LLM. For scripted, production-style integrations, the REST API is still the right tool — and it just got a lot better to work with.

Full setup instructions for every client are in the MCP docs.

Reworked API documentation

What's new:

• A real structure. A dedicated developer portal with an API overview, authentication guide, files and documents guide, and the MCP server docs — separate from the endpoint reference, so you can learn the platform before diving into individual calls.

• In-depth model descriptions. Every resource is documented properly. The TimeEntry model, for example, now explains how trackingType and timerMode interact and which fields are required in each combination — the kind of context that used to live only in someone's head.

• Search. Find any endpoint, model, or field instantly instead of scrolling one giant page.

• New design with dark and light mode. A faster, cleaner reading experience that's easy on the eyes, day or night.

• Clearer navigation. Endpoints are grouped by resource with CRUD and domain-specific calls laid out consistently, so the shape of the API is obvious at a glance.

The full reference covers every Aerion model — Absence, Client, Invoice, Project, Task, TimeEntry, User, and many more — with their CRUD endpoints, analytics, and approval flows.

Start at the developer portal or jump straight into the API reference.

We're excited to see what you and your agents build on Aerion. If you have questions, feedback, or requests for new MCP tools, let us know.

This release introduces a flexible and compliant worktime synchronization between Aerion and your HRIS (e.g. Personio). It eliminates manual data transfer, improves data consistency, and aligns operational time tracking with HR approval processes.

What's new

HRIS Worktime Synchronization
Working hours and breaks recorded in Aerion can be automatically synchronized to the connected HRIS (e.g. Personio). Breaks are transferred correctly and split in a compliant way.

Configurable Sync Triggers
Worktime synchronization can be aligned with internal workflows:

• Manual sync by team lead

• After each change

• After employee submission

• After managerial approval

Selectable Approval Location
Organizations can define where worktimes are reviewed and approved:

• In Aerion: Approval status is transferred to the HRIS (e.g. Personio)

• In HRIS: Worktimes are transferred unapproved and reviewed directly in the HRIS
  
  

Benefits

No double data entry
Worktimes are recorded once in Aerion and reliably synchronized to your HRIS (e.g. Personio).

Compliance by design
Approval workflows and break handling align operational time tracking with HR and legal requirements.

Clear ownership of approvals
Define whether worktimes are reviewed in Aerion or directly in the HRIS—fully aligned with your internal processes.

Faster, more reliable payroll preparation
Consistent and approved worktime data is always available in the HRIS, reducing follow-ups and corrections.

Logging into Aerion just got a whole lot easier. You can now use Google or Microsoft Single Sign-On (SSO) to access your workspace — no more juggling multiple passwords.

New

• Google SSO → Sign in with your Google Workspace account

• Microsoft SSO → Sign in with your Microsoft 365 account

• Faster, more secure, and easier access for your whole team

Benefits

• Save time on logins

• Rely on enterprise-grade security

• Manage access centrally through your identity provider

• Manage SSO settings for each user individually

We’ve made several improvements to the browser and desktop app including Submission Rules for workdays to improve the overall quality of submitted time entries.

Browser App

• Work time & project time submission rules which can be defined per account settings and per project

• Set work time to sum of project time in submission modal

• A new KPI "Profitability incl. Forecast" which provides a projected profitability percentage respecting planning

• several UI and UX improvements

MacOS and Windows App (Version 2.7.0)

• Support of work time & project time submission rules

• Support of custom Jira issue type icons for references like in the desktop app

• Fixes an issue where dropdowns could lose their ability to be navigated with the keyboard

• Planner assignments and account settings now update live via socket