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  • API Rate Limits
API Dashboard

API RATE LIMITING

If you require an increase beyond the default rate limits, please contact our support team to discuss your needs.

API RATE LIMITING

Rate limits are in place to protect our customers and the platform while allowing us to provide you with the best accuracy and validation speed. While it’s not our intention, going over these limits may result in a temporary block. As such, we recommend that our customers and partners adhere to best practices and stay within these limits.

Note for ZeroBounce ONE™ Customers: To support high-volume enterprise workflows, ZeroBounce ONE™ accounts automatically include higher rate limits (approximately 20–25% above standard levels). These adjusted limits are detailed below.

GENERAL RATE LIMITS

Bad requests to any endpoint (as an example, not including the email parameter in an API call) 100 times in 1 minute will result in a temporary block for 1 hour.

Requests to non-existent pages or endpoints 100 times in 2 minutes will result in a temporary block for 1 hour.

GETCREDITS V2

We allow a maximum of 80,000 requests per hour (100,000 for ZeroBounce ONE™ Customers) for the following endpoints:

  • api.zerobounce.net/v2/getcredits

  • api-us.zerobounce.net/v2/getcredits*

  • api-eu.zerobounce.net/v2/getcredits

Exceeding this limit results in a temporary block for 1 day.

Bad API key requests (200 times in 1 hour) to the following endpoints will result in a temporary block for 1 day:

  • api.zerobounce.net/v2/getcredits

  • api-us.zerobounce.net/v2/getcredits

  • api-eu.zerobounce.net/v2/getcredits

API VALIDATION V2

We allow a maximum of 80,000 requests in 10 seconds validations (100,000 for ZeroBounce ONE™ Customers) for the following endpoints:

  • api.zerobounce.net/v2/validate

  • api-us.zerobounce.net/v2/validate*

  • api-eu.zerobounce.net/v2/validate

Exceeding this limit results in a temporary block for 1 minute.

Bad API key requests (200 times in 1 hour) to the following endpoints will result in a temporary block for 1 hour:

  • api.zerobounce.net/v2/validate

  • api-us.zerobounce.net/v2/validate*

  • api-eu.zerobounce.net/v2/validate

GETAPIUSAGE V2

We allow a maximum of 800 requests in 1 hour (1000 for ZeroBounce ONE™ Customers) for the following endpoints:

  • api.zerobounce.net/v2/getapiusage

  • api-us.zerobounce.net/v2/getapiusage*

  • api-eu.zerobounce.net/v2/getapiusage

Exceeding this limit results in a temporary block for 1 hour.

Bad requests (200 times in 1 hour) to the following endpoints will result in a temporary block for 1 hour:

  • api.zerobounce.net/v2/getapiusage

  • api-us.zerobounce.net/v2/getapiusage*

  • api-eu.zerobounce.net/v2/getapiusage

BULKAPI AND BULKAPI BATCH VALIDATE

We allow a maximum of (250 requests in 1 minute) for the bulkapi.zerobounce.net/ before temporarily blocking for 1 hour.

To ensure optimal performance and stability, the following endpoints are subject to rate limiting. We support batch processing for up to 100 emails per request, with a maximum of 30 requests per minute (40 for ZeroBounce ONE™ Customers). Exceeding these limits will result in a temporary 10-minute cooling-off period (block).

  • bulkapi.zerobounce.net/v2/validatebatch

  • api-us.zerobounce.net/v2/validatebatch

  • api-eu.zerobounce.net/v2/validatebatch

  • api.zerobounce.net/v2/validatebatch

  • bulkapi.zerobounce.net/v2/validatebatch

  • api-us.zerobounce.net/v2/validatebatch

  • api-eu.zerobounce.net/v2/validatebatch

  • api.zerobounce.net/v2/validatebatch

Bad requests to bulkapi.zerobounce.net (200 times in 1 hour) will result in a temporary block for 1 hour.

BULKAPI UNKNOWN

Batch responses to bulkapi.zerobounce.net/v2/validate that contains over 20 unknown statuses (that are neither greylisted nor antispam) more than once per hour will temporarily block for 1 hour.

ACTIVITY V2

Bad API key requests (200 times in 1 hour)to the following endpoints will result in a temporary block for 1 hour:

  • api.zerobounce.net/v2/activity

  • api-us.zerobounce.net/v2/activity*

  • api-eu.zerobounce.net/v2/activity

  • *This endpoint uses servers located within the United States. By utilizing this endpoint, you acknowledge and consent to your data being processed on servers in the United States.