---
title: FUNCTION_RESPONSE_PAYLOAD_TOO_LARGE
product: vercel
url: /docs/errors/FUNCTION_RESPONSE_PAYLOAD_TOO_LARGE
canonical_url: "https://vercel.com/docs/errors/FUNCTION_RESPONSE_PAYLOAD_TOO_LARGE"
last_updated: 2026-02-09
type: reference
prerequisites:
  []
related:
  - /docs/functions/limitations
summary: The function returned a response that is too large. This is a function error.
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---

# FUNCTION_RESPONSE_PAYLOAD_TOO_LARGE

The `FUNCTION_RESPONSE_PAYLOAD_TOO_LARGE` error occurs when the function returned a response that exceeds the maximum allowed size of 4.5 MB.

**Error Code:** `500`

**Name:** Response Payload Too Large

## Troubleshoot

To troubleshoot this error, follow these steps:

1. **Review response payload size:** Check the size of the response payload being returned by the function to ensure it's within the allowed limits, and does not exceed the [limit of 4.5 MB](/docs/functions/limitations#request-body-size)
2. **Reduce response payload size:** If possible, reduce the size of the response payload being returned by the function


---

[View full sitemap](/docs/sitemap)


If you encounter incorrect information, can’t find what you need, need a capability Vercel doesn’t currently offer, or have any other feedback to report, please do it by following the instructions at https://vercel.com/feedback.md.