Deltek Ajera Python client

A typed Python client and command-line interface for the Deltek Ajera API.

Ajera exposes a single JSON-RPC style endpoint; this package wraps it in an ergonomic, fully type-hinted client built on Pydantic models, plus an ajera CLI for quick access from the terminal. Responses are validated and normalized into predictable Python objects so you can work with employees, projects, vendors, invoices, and general-ledger data without hand-rolling request payloads.

Features

• Typed models - every response is parsed into Pydantic models with descriptive fields.
• Python client and CLI - use it as a library or straight from the shell via ajera.
• Sync and async - AjeraClient and AsyncAjeraClient expose the same methods over httpx.
• Sensible defaults - handles session tokens and per-method API versions for you.
• Read and write - list, get, update, and create across the supported APIs.

Installation

The package is published on PyPI as ajera:

pip install ajera
# or, with uv:
uv add ajera

Requires Python 3.12+.

Configuration

Credentials are read from environment variables (or can be passed directly to AjeraClient):

export AJERA_API_URL="https://ajera.com/V0000000/AjeraAPI.ashx?..."
export AJERA_API_USERNAME="your-username"
export AJERA_API_PASSWORD="your-password"

For setting up an API user and generating credentials, see the Deltek Ajera Learning Hub API docs.

Timeouts and retries

Every request carries a timeout (default (5, 30) seconds for connect and read) so a stalled connection can't hang the caller forever. Pass timeout= to override it (a single float, a (connect, read) tuple, or None to disable), and retries= to retry connection-establishment failures:

# Wait longer, and retry a dropped/stale connection up to 3 times.
client = AjeraClient(timeout=60, retries=3)

retries retries only the connection stage (before any bytes reach the server), which is safe for the non-idempotent writes this client performs: a create whose response is merely lost is never resubmitted. The CLI reads AJERA_API_TIMEOUT (seconds) and AJERA_API_RETRIES (count) for the same behavior.

Quick start

Python

from ajera import AjeraClient

# Reads AJERA_API_URL / AJERA_API_USERNAME / AJERA_API_PASSWORD from the
# environment, or pass url=, username=, password= explicitly.
client = AjeraClient()

for employee in client.list_employees():
    print(employee.employee_key, employee.first_name, employee.last_name)

Python (async)

AsyncAjeraClient mirrors AjeraClient method for method - same arguments, same return types, awaited. Share one instance across tasks so they reuse its connection pool and session token, and bound the fan-out with a semaphore (the API throttles at roughly 9 requests per second):

import asyncio

from ajera import AsyncAjeraClient


async def main() -> None:
    async with AsyncAjeraClient() as client:
        projects = await client.list_projects()
        limit = asyncio.Semaphore(5)

        async def totals(project_key: int):
            async with limit:
                return await client.get_project_totals(project_key)

        for total in await asyncio.gather(
            *(totals(project.project_key) for project in projects)
        ):
            print(total.project_key, total.totals)


asyncio.run(main())

Outside a context manager, call await client.aclose() when you're done with it.

CLI

$ ajera employees list
[
  {
    "employee_key": 42,
    "first_name": "John",
    "last_name": "Smith",
    ...
  },
  ...
]

Note: List commands backed by an active/inactive status return only active records by default. Pass --status to override - e.g. --status Inactive, or --status Active --status Inactive to include both.

Reference Documentation

This client adheres (to the extent possible) to the API documentation provided by Deltek Ajera, which can be found at:

https://help.deltek.com/product/Ajera/api/index.html

API reference

Each section below maps a CLI command group to the Ajera API(s) it is built on. The Python client exposes the same operations as client.<method>() (e.g. client.list_employees(), client.get_projects(...)), and AsyncAjeraClient exposes every one of them as a coroutine of the same name.

Employees

Docs: Employees API · List Methods API

pays, payroll-taxes, and wage-tables come from the List Methods API; the rest come from the Employees API.

Note: employees list returns company_key and department_key as bare integers - the API attaches no names to them. To group employees by department, join department_key against the department_key of client.list_departments() (ajera departments).

Clients

Docs: Clients API

Contacts

Docs: Contacts API

Vendors

Docs: Vendors API · Vendor Invoices API (v2)

The invoices subcommands come from the Vendor Invoices (v2) API; the rest come from the Vendors API.

Ajera reports no payment property on a vendor invoice: paid, unpaid, and voided exist only as list filters. Passing --with-payment-status (or with_payment_status=True to list_vendor_invoices) derives it and fills in each invoice's payment field with Paid, Unpaid, or Voided. It costs one extra request, so the field stays null unless you ask for it:

for invoice in client.list_vendor_invoices(with_payment_status=True):
    print(invoice.vendor_invoice_key, invoice.payment)

Projects

Docs: Projects API (v2) · Projects API (v1) · List Methods API

list, get, update, and create use the v2 Projects API; totals, types, and templates use the v1 Projects API; chargeable-phases comes from the List Methods API.

General Ledger

Docs: GL Accounts API · List Methods API

account-groups comes from the List Methods API; list and get come from the GL Accounts API.

Reference lists

Docs: List Methods API

Lightweight lookup lists. (Other List Methods endpoints are grouped with their domain - see employees, ledger, and projects above.)