Rate Limits

The impact.com partner API limits how many calls a client can make in a given hour to help protect our system against traffic spikes that could disable it. If the number of requests you are trying to make exceeds your limit, your requests will be throttled and we will respond with a 429 - Too Many Requests response along with the following headers:

Attribute	Description
X-RateLimit-Limit-hour	Maximum number of requests allowed for the resource within the given time period.
X-RateLimit-Remaining-hour	Number of requests left as of the current request within the given time period.
RateLimit-Reset	Number of seconds until the limit is reset. This is in-line with IETF standards
Retry-After	Will only be present on rate limited responses, and indicates how long the client will be rate limited for.

Different endpoint groups have different default rate limits.

Hourly rate limits

Group	Description	Hourly rate limit
Performance detail	Any resource that references event level performance data, including /Actions, /Clicks, and some /Reports.	500 requests
Performance aggregate	Any /Reports resource that references aggregated performance data.	250 requests
Product Search	Any resource that enables partners to query brand’s product, including /Catalogs/ItemSearch and /Catalogs/*/Items.	3,000 requests
Other	Any resource not referenced above.	1,000 requests

Daily rate limits

Group	Description	Daily rate limit
Report Export	Any /ReportExport requests.	100 requests
Click Export	Any /ClickExport requests.	10 requests

Rate limits are subject to change at any given time based on the needs of the system. It is best practice for applications to monitor their current rate limit status and dynamically throttle requests if necessary.

Example rate limit headers

HTTP

HTTP/1.1 200 OK
Content-Type: application/json
X-RateLimit-Limit-hour: 100
X-RateLimit-Remaining-hour: 100
RateLimit-Reset: 700

LIMIT EXCEEDED