Every WooCommerce REST API fix we catalog

Add a descriptive, non-empty `<title>` element to every page so browsers, screen readers, and search engines can identify it.

On WooCommerce REST API

1. When creating or updating products via the REST API, include the 'yoast_head_json' or use the Yoast SEO REST endpoint PATCH /wp-json/yoast/v1/indexable to set the title.
2. Alternatively, update the post's native title (which Yoast uses as fallback) via PATCH /wp-json/wc/v3/products/{id} with { 'name': 'Your Product Title' } — this populates the SEO title template automatically.
3. Verify by fetching the page HTML and confirming a non-empty <title> tag is present.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Women's Running Shoes – Acme Sports</title>
</head>
<body>
  <!-- page content -->
</body>
</html>

Enable HTTPS by installing a valid SSL/TLS certificate and redirecting all HTTP traffic to the secure HTTPS version of your store.

On WooCommerce REST API

1. The REST API inherits the SSL status of the WordPress/WooCommerce installation.
2. Ensure HTTPS is active and enforced on the WordPress site first (see WooCommerce steps above).
3. WooCommerce REST API requires HTTPS by default for all authenticated endpoints — if your site is HTTP-only, API calls using OAuth or Application Passwords will fail or be insecure.
4. After enabling HTTPS, update any API client configurations or webhooks to use the https:// base URL.

Add a DNS TXT record containing a valid SPF policy to your domain so that email receivers can verify which servers are authorised to send mail on your behalf.

On WooCommerce REST API

1. This is a headless WooCommerce setup; email is still sent by the WordPress/WooCommerce backend via your SMTP configuration.
2. Identify your SMTP provider in your SMTP plugin settings (e.g. WP Mail SMTP → Settings) and add its SPF include: tag to a TXT record at '@' in your DNS provider.
3. Verify propagation.

v=spf1 include:_spf.google.com include:sendgrid.net include:spf.mailgun.org -all