diff --git a/README.md b/README.md
index 0dce405..4b2c92f 100644
--- a/README.md
+++ b/README.md
@@ -406,7 +406,7 @@ Please remove secrets, cookies, private tokens, and customer data from logs befo
 <table>
   <tr>
     <td align="center">
-      <a href="https://coldproxy.com/">
+      <a href="https://coldproxy.com/?utm_source=github&utm_medium=sponsorship&utm_campaign=webclaw-sponsor">
         <img src="./assets/sponsors/coldproxy-banner.png" alt="ColdProxy" width="720" />
       </a>
     </td>
@@ -416,7 +416,7 @@ Please remove secrets, cookies, private tokens, and customer data from logs befo
       <strong>ColdProxy</strong> supports webclaw as an Infrastructure Partner, providing residential IPv4,
       residential IPv6, and datacenter IPv6 proxy infrastructure across 195+ countries for public data
       collection, regional testing, monitoring, and web scraping workflows. Explore
-      <a href="https://coldproxy.com/">ColdProxy</a>'s latest plans and available offers directly on the website.
+      <a href="https://coldproxy.com/?utm_source=github&utm_medium=sponsorship&utm_campaign=webclaw-sponsor">ColdProxy</a>'s latest plans and available offers directly on the website.
       See the <a href="examples/proxy-backed-crawling/#using-coldproxy">proxy-backed crawling guide</a>
       for a hands-on walkthrough of wiring ColdProxy into webclaw.
     </td>
diff --git a/examples/proxy-backed-crawling/README.md b/examples/proxy-backed-crawling/README.md
index 3bf3829..e628769 100644
--- a/examples/proxy-backed-crawling/README.md
+++ b/examples/proxy-backed-crawling/README.md
@@ -4,11 +4,11 @@ Use proxy rotation when you need to distribute a crawl across a proxy pool. webc
 
 ## Using ColdProxy
 
-[ColdProxy](https://coldproxy.com/) is webclaw's infrastructure partner, providing residential IPv4, residential IPv6, and datacenter IPv6 proxies across 195+ countries. Use a ColdProxy endpoint as a full URL with `--proxy` / `WEBCLAW_PROXY`, or list several in a `--proxy-file` pool.
+[ColdProxy](https://coldproxy.com/?utm_source=github&utm_medium=sponsorship&utm_campaign=webclaw-sponsor) is webclaw's infrastructure partner, providing residential IPv4, residential IPv6, and datacenter IPv6 proxies across 195+ countries. Use a ColdProxy endpoint as a full URL with `--proxy` / `WEBCLAW_PROXY`, or list several in a `--proxy-file` pool.
 
 ### 1. Get your endpoint
 
-Sign in to your [ColdProxy dashboard](https://coldproxy.com/) and copy your proxy host, port, and credentials. Assemble them into a standard proxy URL:
+Sign in to your [ColdProxy dashboard](https://coldproxy.com/?utm_source=github&utm_medium=sponsorship&utm_campaign=webclaw-sponsor) and copy your proxy host, port, and credentials. Assemble them into a standard proxy URL:
 
 ```text
 http://USERNAME:PASSWORD@HOST:PORT