We're making changes to our HTTP/1.0 and HTTP/1.1 request handling to improve security and compliance with web standards. Starting August 1, 2025, all POST requests to Shopify APIs must include either a Content-Length header or Transfer-Encoding: chunked header, or they'll return an HTTP 411 error.
Summary extracted from the official source text. Verify details on the source page.
| Platform | Shopify |
|---|---|
| Effective date | 2025-08-01 (passed) |
| Precision | day |
| Published | 2025-06-28 |
| Categories | DeprecationBreaking / action requiredPolicy |
| Tags | API, Action Required, Admin GraphQL API, Admin REST API, Customer Account API, Deprecation announcement, Events & webhooks, Payments Apps API, Storefront API |
| Official source | Shopify developer changelog ↗ |
| Fetched | 2026-10-17T03:44:00+00:00 |
| First seen | 2026-10-17T01:05:46+00:00 |
| Status | Listed by the source |
| Stable ID | shopify-0d086a53a5 · JSON |