Developer portal
Build with 4agent
The public 4agent API is read-only and requires no API key. Use it to discover tools, filter the catalog, retrieve a complete listing, or load an executable recipe into an agent workflow.
Quickstart
Request the catalog with any HTTP client. Responses use JSON and stable field names.
curl "https://4agent.dev/api/tools?q=browser&view=summary"curl "https://4agent.dev/api/tools?id=browserbase"Machine-readable contracts
The OpenAPI 3.1 document describes query parameters, operation identifiers, response schemas, and structured errors. The llms.txt file explains when an agent should use the catalog and points to the same endpoints.
Live examples
These links execute against the production read-only API, so they can be used as a simple sandbox. No account, write access, or credential is involved.
Standards and verification
The schema follows the OpenAPI Specification. Tool records also distinguish MCP support using the terminology in the Model Context Protocol specification. Verify provider-specific fields against the official source linked from each tool page before depending on them in an automated decision.