What Counts as an API Request?

Depending on the endpoint you’re using, API calls are counted differently.

Enrichment API

With Clearbit’s Enrichment API, one API call is used per request made. This means that when you look up a person or company’s data based on an email or domain, one Enrichment API call will be used; this holds true even if no results are returned.

API requests can be made by way of:

  • Direct access (ex. cURL command)
  • Your own application
  • A prebuilt integration (ex. Slack)

Note: Unique requests are only counted once every 30 days against your allotment, so if you didn’t store the data properly or need to re-run a series of requests for any reason, those won’t count against your monthly quota. As such, you’re free to make identical API requests over and over during the same billing period, which is often very helpful for developers who’re testing out an integration.

For Enrichment API details, visit our support library.


Discovery APIs

With Clearbit’s Discovery API, one API call is used per unique result that Clearbit is able to return. This means that when you make a request with a specific criteria, the endpoint will give you an array of companies that fit the bill; one Discovery API call will be used for each company that is returned to you.

Note: Unique requests are only counted once every 30 days against your allotment, so if you didn’t store the data properly or need to re-run a series of requests for any reason, those won’t count against your monthly quota. As such, you’re free to make identical API requests over and over during the same billing period, which is often very helpful for developers who’re testing out an integration.

For Discovery API details, visit our support library.

Prospector API

With Clearbit’s Prospector API, one API call is used per unique result that Clearbit is able to return. This means that when you search for a company to find its contacts, the endpoint will give you an array of people who work at the company; one Prospector API call will be used for each person’s contact that is returned to you.

Note: Unique requests are only counted once every 30 days against your allotment, so if you didn’t store the data properly or need to re-run a series of requests for any reason, those won’t count against your monthly quota. As such, you’re free to make identical API requests over and over during the same billing period, which is often very helpful for developers who’re testing out an integration.

For Prospector API details, visit our support library.