diff --git a/Companies-and-Individuals-Using-Beast.md b/Companies-and-Individuals-Using-Beast.md
index 3aea2e8..7be49c0 100644
--- a/Companies-and-Individuals-Using-Beast.md
+++ b/Companies-and-Individuals-Using-Beast.md
@@ -87,3 +87,9 @@ https://github.com/openbmc/bmcweb
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 [Robo-FTP](https://www.robo-ftp.com)
 uses beast for its HTTP client and server enterprise managed file transfer software.
+
+-----------
+
+[`Xeverous/filter_spirit`](https://github.com/Xeverous/filter_spirit) is a compiler/generator tool that produces UI stylesheets for the Path of Exile online game (called "item/loot filters") based on the user-written configuration in Filter Spirit's own domain-specific language. Filter Spirit uses Boost Spirit to implement its DSM and Beast's HTTP to query game community tools like poe.ninja or poe.watch to obtain current item prices allowing the tool to (re)generate finely grained loot filters that are adjusted to specific gameplay and ever-changing game economy.
+
+Beast has significantly simplified issuing calls to JSON REST APIs. Big thanks for the examples.