---
title: How does carrier API response time impact rates returned to my Shopify store?
description: Shopify allows a 10 second window for a response back to the store. The carrier response may not take more than 5-7 seconds.
---

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October 27, 2026

# How does carrier API response time impact rates returned to my Shopify store?

## Shopify allows a 10 second window for a response back to the store. The carrier response may not take more than 5-7 seconds.

## Why does Shopify's 10-second limit affect whether a shipping rate is returned?

Shopify allows third-party apps a maximum of 10 seconds to return negotiated shipping rates. Verify the current limit in Shopify's documentation, as this value is subject to change. Within that window, an Eniture quoting app must complete several additional API transactions beyond the carrier's own response — including confirming the address type, running Standard Box Sizes (SBS) if enabled, and querying Google Cloud Platform to determine warehouse distances and select the correct fulfillment location. The time the carrier's API takes to respond directly affects whether a rate is returned before Shopify's limit is reached.

## How does carrier API response time affect the likelihood of a successful rate response?

The longer the carrier takes to respond, the less time remains for the app to complete its other operations before Shopify's limit is reached. Use the thresholds below as a guide:

- **5 seconds or less:** Very high probability of a successful rate response
- **6 seconds:** High probability
- **7 seconds:** Low to medium probability
- **More than 7 seconds:** Unlikely to return a rate

## How can you check how long the carrier is taking to respond?

To view carrier API response times for individual rate requests, enable the **Logs** feature in the Eniture quoting app. For step-by-step instructions, see [Using Logs In Quoting Apps & Plugins From Eniture Technology](https://support.eniture.com/using-logs-in-quoting-apps-from-eniture-technology?hsLang=en).

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