Update a product metafield in Shopify using a Zapier webhook.

Shopify Discussion

Topic summary

A user is attempting to update a product metafield in Shopify via a Zapier webhook but encounters a 400 error: “Required parameter missing or invalid.”

Metafield specifications:

  • Namespace: custom
  • Key: recommended_style_url
  • Type: URL
  • Target Product ID: 9049973784855

Core problem: The user cannot identify the correct API endpoint or proper request formatting for updating this specific metafield.

Supporting materials: Five screenshots are provided showing error messages and configuration details, which likely contain the attempted endpoint, request structure, and full error response.

Status: The issue remains unresolved with no responses yet. The user is seeking confirmation of the correct API endpoint and request format to successfully update the metafield value.

Summarized with AI on November 1. AI used: claude-sonnet-4-5-20250929.
1

I’m trying to update a product metafield in Shopify using a Zapier webhook, but I’m facing an issue finding the correct API endpoint to update the required metafield.

Metafield Details:- Namespace: custom

  • Key: recommended_style_url
  • Type: URL
  • Value: A URL that I need to update on a specific product
  • Product ID: 9049973784855

Issue:

I’m getting the following error:
Required parameter missing or invalid (HTTP Status Code: 400)

Can anyone help me confirm the correct API endpoint for updating a product metafield and ensure that my request is properly formatted?

Adding the error screenshot below

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