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.
What is 4agent?
4agent organizes agent-ready services by the work they help with, from search and data access to deployment and hosting. Each listing brings the product summary and integration details into one place.
Which standards inform the catalog?
Integration fields use the terminology defined by the Model Context Protocol specification and the OpenAPI Specification. These sources define the interface formats; individual provider claims are verified against the official product site linked from its listing.
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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