Description
Every cache purge leaves your pages “cold”: the first visitor after a purge pays the full origin render time. CacheBoost Warmer closes that gap. Whenever a purge or invalidation occurs in WordPress, it tells the CacheBoost API to re-warm the affected pages, so your cache stays hot and every visitor hits a fast, cached response.
Features:
- Smart warming — resolves purged post/term URLs and triggers a targeted warm (only the affected pages).
- Full warming — triggers a full site warming on global events (theme switch, plugin upgrade, full cache purge).
- Deduplication — multiple purge events within the same HTTP request produce a single API call.
- Non-blocking — uses
wp_remote_post()withblocking => false; never delays a WordPress request. - WooCommerce — warms product and category pages on save; optional stock-change warming.
- Cache plugin integrations — WP Rocket, W3 Total Cache, LiteSpeed Cache, WP Super Cache.
- Multisite — each sub-site has its own settings and API key.
Configuration
Step 1 — Get your API key
- Log in to app.cache-boost.com.
- Go to your profile and click New API key.
- Select the scopes:
sites:read,boosts:read,boosts:write,runs:read. - Copy the generated key (format
cb_live_…).
Step 2 — Configure the plugin
Go to the CacheBoost menu:
- Enable — master on/off switch.
- API Key — paste your
cb_live_...key. - Warming triggers — Smart (targeted URLs) and/or Full (entire site), each can be toggled independently.
- Stock Warming — (WooCommerce only) warm product pages after stock changes.
- Test Connection — validate your API key without leaving the admin.
Cache plugin support
WP Rocket, W3 Total Cache, LiteSpeed Cache, WP Super Cache
External Services
This plugin sends data to the CacheBoost API (https://api.cache-boost.com) to trigger cache warming jobs after a purge event. Data transmitted includes the site URL, the list of page URLs to warm and a timestamp. No personal user data is sent.
Requests are only made when:
– The plugin is enabled in the CacheBoost settings
– A valid API key (format: cb_live_…) has been configured
CacheBoost Terms of Service: https://www.cache-boost.com/terms
Screenshots
Installation
- Upload the
cacheboost-warmerfolder towp-content/plugins/. - Activate the plugin via Plugins Installed Plugins.
- Go to the CacheBoost menu in the admin sidebar and enter your API key.
FAQ
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Does this plugin slow down my WordPress site?
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No. Warming notifications are fire-and-forget (
blocking => false) and never delay a request. The dashboard widget and history page fetch stats from the API; widget results are cached for a couple of minutes. -
Does it work on multisite?
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Yes, but do not network-activate. Each sub-site should have its own settings and API key.
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What is sent to the CacheBoost API?
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Only the site URL, the list of page URLs to warm (Smart mode), and a timestamp. No credentials and no personal data are ever transmitted.
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What happens if my API key is invalid or the API is unreachable?
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Nothing breaks on the front end. Because notifications are non-blocking, a failed or rejected request is logged silently and your WordPress pages keep serving as usual. Use Test Connection in the admin to validate the key.
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Does CacheBoost work with my CDN?
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CacheBoost works with any CDN that serves content via HTTP — Cloudflare, Fastly, BunnyCDN, KeyCDN, and more. If your CDN caches HTTP responses, CacheBoost can warm it.
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Does CacheBoost work without a CDN?
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Absolutely. CacheBoost works with any caching layer — not just CDNs. If your site uses Varnish, Redis, a file cache, a database cache, or any HTTP-based caching system, CacheBoost can warm it. As long as your pages are served faster on the second request, CacheBoost is useful.
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Will the warming requests affect my server load?
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Warming requests are sent at a controlled rate to avoid overloading your origin server. You can configure the concurrency and request rate per boost from your CacheBoost dashboard.
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What if my site has thousands of URLs?
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No problem. On a full warm, CacheBoost reads your sitemap (including multi-level and sitemap index files) with no limit on the number of URLs. Every page gets warmed, regardless of the size of your site.
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Is my data safe?
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CacheBoost only sends HTTP requests to your public URLs — the same requests any visitor would make. No credentials and no private data are ever accessed.
Reviews
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Contributors & Developers
“CacheBoost Warmer” is open source software. The following people have contributed to this plugin.
Contributors
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Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0.1
- Improvement: clearer admin notices on Test Connection failures.
1.0.0
- Initial release.