diff --git a/README.md b/README.md
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@@ -1312,6 +1312,7 @@ API | Description | Auth | HTTPS | CORS |
 ### Machine Learning
 API | Description | Auth | HTTPS | CORS |
 |:---|:---|:---|:---|:---|
+| [AI Economics Tools](https://piszczek.pl/tools/api) | Token cost, LLM energy, agent-hour and Proof-Adjusted Autonomy calculators by Michał Piszczek | No | Yes | Yes |
 | [AI For Thai](https://aiforthai.in.th/index.php) | Free Various Thai AI API | `apiKey` | Yes | Yes |
 | [Clarifai](https://docs.clarifai.com/api-guide/api-overview) | Computer Vision | `OAuth` | Yes | Unknown |
 | [Cloudmersive](https://www.cloudmersive.com/image-recognition-and-processing-api) | Image captioning, face recognition, NSFW classification | `apiKey` | Yes | Yes |