About
A practical directory for agent builders
4agent is an independent directory of APIs, MCP servers, and developer services that AI agents can use. It turns scattered product information into concise listings that people and software can browse.
Who curates 4agent?
Michael Yu curates and maintains 4agent. The project source and change history are available in the public repository.
How are tools selected and reviewed?
Listings focus on services with a clear use in agent workflows and enough public information to evaluate. Each submission is reviewed before publication, then described with practical fields such as authentication, pricing, SDKs, API access, MCP support, and OpenAPI availability.
Read the directory methodologyHow can a listing be corrected?
Send the source that supports the change through the contact page. Tool owners can also submit a new listing for review. Corrections are checked against public product documentation before publishing.
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