Kai's tool library
Curated, opinionated, tiered. S-tier is what I'd tell a friend to use. A-tier is worth your time. B-tier works but probably isn't the best option.
Agents · 4
Manus
SAutonomous AI agent that actually finishes tasks.
Free tier + $39-$199/mo
Devin
ACognition Labs' autonomous coding engineer.
$500/mo
ChatGPT Operator
BOpenAI's browser agent. Clicks and types on websites for you.
Included with ChatGPT Pro $200/mo
Claude Agent SDK
SAnthropic's SDK for building your own agents on Claude.
API usage + SDK is free