DeepSeek-V4.io - Text chat, API, and agent guides
DeepSeek-V4.io is an independent resource for developers evaluating text-based DeepSeek workflows. It combines hosted chat, a paid API gateway, and practical configuration guides for coding-agent clients such as Codex, Claude Code, and DeepSeek Harness. The public gateway exposes deepseek-v4-flash for text input only, and API access requires paid balance and a paid API key. The site clearly separates its own gateway from official DeepSeek services and documents the route developers are actually configuring.