To prevent API rate-limit errors in n8n, first check the API’s quota, then pace requests with Retry On Fail, Loop Over Items plus Wait, or HTTP Request batching. There is no universal safe delay: the right interval and batch size depend on the service and endpoint.
What an API rate-limit error looks like in n8n
When a node exceeds an API’s allowed request frequency, it can fail and display the service’s error message. HTTP 429 is the standard signal for too many requests. APIs may also limit the size of requests or responses; those are separate constraints and may need a different fix.
Check the API’s quota before choosing a delay
Read the current documentation for the specific API and endpoint. Look for its request-frequency limit and any rules that affect how the limit is counted. Use those rules to choose a wait interval or batch size; n8n does not provide a single setting that is safe for every API.
For example, n8n’s documentation illustrates a service that allows one request per second with a 1000 ms wait. That is an example configuration, not a general recommendation. UI labels can also vary by installed n8n version.
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Retry a failed request with Retry On Fail
Use this pattern when a request may fail temporarily and you want the node to try again after a pause.
- Open the node that makes the API request.
- Open Settings and enable Retry On Fail.
- Set the wait between tries to match the API’s documented quota.
This retries a failed request after the configured wait. It does not establish that n8n will follow service-specific retry instructions, such as a Retry-After header; the documentation does not specify that behavior. Check the API’s guidance and monitor the resulting executions.
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Control request pacing across multiple items
If a workflow sends a request for each incoming item, processing items too quickly can exceed a frequency quota. You can add an intentional pause between requests using either of these approaches.
Loop Over Items with Wait
Use Loop Over Items to process input in batches, place a Wait node in the request path, and connect the flow back into the loop. Configure the batch handling and pause to fit the API’s rules. This gives the workflow a deliberate pacing point as it processes items.
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HTTP Request batching
In the HTTP Request node, choose Add Option > Batching, then configure Items per Batch and Batch Interval (ms). n8n describes this as an alternative to using Loop Over Items with Wait. Set both values according to the target API; there is no documented universal batch size or interval.
Use pagination for large result sets
Pagination is for APIs that split a large result set across multiple responses. Configure pagination in the HTTP Request node according to the API’s pagination scheme. It helps retrieve results that do not fit in one response, but it does not by itself slow requests enough to comply with a frequency quota. If both constraints apply, configure pagination and request pacing separately.
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Check executions and adjust the workflow
After configuring retries or pacing, inspect execution output for node errors and the service’s returned messages. If rate-limit errors continue, compare the actual request pattern with the API’s current quota and adjust the wait or batch settings. A change that fixes one endpoint or account may not suit another with different rules.
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