Guide
Does your Rent Manager plan include API access? It’s probably the most common question from Rent Manager operators who want to connect an outside tool, and the plan name alone won’t answer it. Here’s what Rent Manager publishes, how to check your own account in a few minutes, and what the errors mean.
Rent Manager offers API access as an add-on on every bundle. Its pricing page lists three bundles, Basic, Plus and Premium, and lists Open API under Add-On Services, available with every bundle (rentmanager.com/pricing, checked November 2026). Rent Manager also describes its API under Software Customization (rentmanager.com/software-customization). Pricing is by quote. In practice, API access depends on your Rent Manager license: if the Rent Manager API service isn’t on your account, LCS (the company behind Rent Manager) can add it.
So you can’t tell from your bundle name whether you have it. You can find out for certain by checking two things on your own account, which takes a few minutes.
For any outside tool to read your Rent Manager data, both of these have to be true:
You can check the first switch yourself, without asking anyone. Open this address in a web browser, putting your Rent Manager database name (company ID) in place of yourcompany:
https://yourcompany.api.rentmanager.com
| What the page shows | What it means |
|---|---|
| A “Welcome to the Rent Manager Web API” login screen | Your account has the API service. If a tool still can’t connect, check the user (switch 2). |
| A block of text containing “You do not have licensing for this product” | The API service isn’t on your account. Contact your Rent Manager rep to add it. |
| “503 Service Unavailable” or “No server is available to handle this request” | There’s no database by that name. Check the spelling of your database name. |
This tests the account only. Whether your own user has API access (switch 2) shows up when you connect.
These are the messages Rent Manager itself returns when a tool signs in. We’ve seen each of them while connecting real databases:
| What you see | What it usually means | Who fixes it |
|---|---|---|
| “You do not have licensing for this product” | The API service isn’t on your company’s account (switch 1). Credentials don’t matter until this is fixed. | LCS: contact your Rent Manager rep to add it. |
| “User could not be found” or a similar sign-in failure | The account has the API, but the username or password is wrong, or that user isn’t set up for API use (switch 2). | Your Rent Manager administrator. |
| “503 Service Unavailable” / “No server is available to handle this request” | The database name is wrong. No Rent Manager database exists at that address. | You: check the spelling. See the browser test. |
| “User is already logged in maximum number of times” | Too many active sessions for that one user. Not a licensing problem. | Wait a few minutes and try again. A dedicated user for each tool avoids it. |
One quirk worth knowing: some systems show the licensing problem as a bare “Internal Server Error” because Rent Manager puts the real reason in the body of its reply, not the error code. If a tool shows you only a generic error, ask its support team what Rent Manager’s actual message said.
Contact LCS (your Rent Manager rep) to add the Rent Manager API service. Rent Manager doesn’t publish API pricing, so the cost depends on your account; get it from your rep, not from a third-party review site. When you ask, it helps to say what you want it for (for example, “read-only reporting through an outside tool”).
Don’t turn on API access for every staff login. Create one Rent Manager user just for the outside tool, give it read permissions for the data you want to ask about, and enable API access on that user only. You get a clean audit trail and can disconnect the tool by disabling one user. Step-by-step: Rent Manager API user setup.
No. Rent Manager offers API access as an add-on on every bundle (pricing page). Check your own account rather than going by bundle name.
Not to use it through a tool like AskRentAI. You create a user and paste three values into a form. See using the Rent Manager API without a developer.
Rent Manager’s API supports both reading and writing (Rent Manager). What a given tool can do depends on the tool and on the permissions of the user you give it. AskRentAI only reads.
No. AskRentAI is an independent connector that uses Rent Manager’s API with your credentials.
$10 per user per month. Seven-day free trial, no card required. Cancel anytime, no contract.
Once API access is on, a lease question is a good first test: see the Rent Manager lease expiration report guide.
More: how to connect AI to Rent Manager · connect Claude · connect ChatGPT · first questions to ask · full setup guide.
Once you have the API, connect it with Rent Manager + Claude or Rent Manager + ChatGPT, or see what it makes possible in Rent Manager AI reporting. The overview is on the Rent Manager AI page.
Seven days free. No credit card. Connected in about ten minutes.
Start your free trial $10/user/month after the trial · cancel anytime