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There are two ways to use Clay as a developer: install the agent plugin to build with Clay inside your coding agent, or call the Public API directly from your own applications and services.

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Agent plugin

The agent plugin gives your coding agent Clay’s skills, MCP tools, and the clay CLI — the fastest way to build with Clay from any coding agent. Copy this into your agent of choice and let it install and set up the plugin for you: 
Install the Clay plugin by following the steps in
https://github.com/clay-run/agent-plugins/blob/main/GETTING_STARTED.md

Agent plugin repository

Manual install and setup instructions for Claude Code, Codex, and Cursor.

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API

Use the Public API to call Clay from your own applications and services — backend jobs, internal tools, queues, and product features. Requests authenticate with a Clay API key in the clay-api-key header.

API reference

Endpoint paths, request bodies, response schemas, and an interactive try-it console.

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Get an API key

You can create an API key two ways: Keep keys server-side. Do not expose them in browser code, mobile apps, public repositories, logs, or analytics tools. See Authentication for details.