Understanding and Resolving ATTOM API Usage Limit Alerts

Last updated: September 1, 2026

If you've received an email notification that your ATTOM API application is approaching or has exceeded its usage limit, this article explains what those alerts mean and what steps you can take.

What Do the Limit Alert Emails Mean?

ATTOM sends automated email alerts when your application reaches certain usage thresholds (e.g., 50%, 80%, 90%, or 100% of your limit). Limits can apply to different time windows depending on your plan, including:

  • Hits per eternity – A lifetime cap on total API calls (common on free trial accounts, typically 1,000 total hits)

  • Hits per month – A monthly rolling limit

  • Hits per day – A daily limit that resets at midnight

  • Hits per minute – A rate limit on how many calls can be made within a single minute

Each API call (hit) counts toward your limit — not just the number of test runs or results returned. Every individual API request is counted.

What Happens When You Hit the Limit?

  • Daily limits reset at midnight, after which your full daily quota becomes available again.

  • Monthly limits reset at the start of the next billing month.

  • Lifetime (per eternity) limits do not reset automatically. Once consumed, further API calls will be blocked and you may receive HTTP 401 Unauthorized errors.

  • Per-minute rate limits: Exceeding the rate limit will temporarily block requests. It is recommended to stay below the per-minute ceiling and avoid short burst spikes at that limit.

I Have Multiple API Keys — Which One Is Generating the Alert?

If you have more than one API key or application registered, the alert will specify the application name. You can review usage for each of your applications at the ATTOM API Usage Dashboard. Make sure you are using the correct key, as different keys may have different limits and usage levels.

How Do I Increase My API Limit?

The ability to reset or increase API limits depends on your account type:

Free Trial Accounts

Technical Support cannot directly reset or increase trial account limits. Only the ATTOM sales and account management team has the authority to adjust free trial quotas or extend access. Please contact your assigned sales or account management representative to discuss your options. If you are unsure who your sales rep or account manager is, you can email datacustomercare@attomdata.com and the support team will connect you with the right person.

Paid / Contracted Accounts

If you are on a paid plan and believe your limit has been set incorrectly (e.g., it does not match your contract), please contact your account manager or the support team at datacustomercare@attomdata.com.

To increase your contracted limit, your account manager can work with you on a plan amendment or upgrade.

How Do I Upgrade to a Paid Plan?

To move from a free trial to a paid subscription, or to upgrade your existing plan for higher call volumes, please reach out to the datacustomercare@attomdata.com and request to be connected with a sales representative.

Tips to Avoid Unexpected Limit Consumption

  • Implement quota management in your application to track and throttle API calls before limits are reached.

  • Use caching to avoid making repeat calls for the same data.

  • Only call the API after qualifying records, rather than on all raw discovery data.

  • Avoid automated processes (such as health monitors or batch scripts) that may make unintended high volumes of API calls.

  • Monitor your usage regularly at the ATTOM API Usage Dashboard.

Still Need Help?

If you believe you received a limit alert in error, or if your dashboard shows usage well below the reported limit, please contact ATTOM Technical Support at datacustomercare@attomdata.com for investigation.