Best API integration platforms to use with Claude Code, Cursor, and Codex (2026)

The text compares four API integration platforms—Nango, Arcade.dev, Composio, and Merge Agent Handler—focusing on their suitability for AI coding agents like Claude Code, Cursor, and Codex. Nango is highlighted for its agentic capabilities, supporting over 700 APIs and offering a comprehensive AI builder skill that allows coding agents to research, write, test, and deploy integrations directly within a development environment. It features robust runtime capabilities, including an MCP server, data syncs, webhooks, and OpenTelemetry observability. Arcade.dev is noted for its MCP-first runtime but lacks a coding-agent skill and broader integration patterns like data syncs. Composio offers a large catalog of pre-built tools with managed authentication but is closed-source and lacks custom tool deployment. Merge Agent Handler provides pre-built tool calls and a catalog of connectors but does not support custom tool calls, data syncs, or webhooks. The text emphasizes that while all platforms provide an MCP server, Nango uniquely supports end-to-end integration development within the same platform, making it ideal for teams needing both build and runtime integration capabilities.

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