DeepSeek Harness Just Got a Web Agent
DeepSeek Harness Desktop is a native app for DeepSeek's open-source agentic coding harness, and almost everything in it is a plugin. In this video, I add TinyFish as one MCP plugin so the agent can search the live web, fetch clean page text, log in to a site, click, fill forms, and return structured JSON. This video is sponsored by TinyFish. → Try TinyFish (Search and Fetch are free, $8 in free credits, no credit card): https://www.tinyfish.ai/compare/tinyfish-vs-firecrawl?utm_source=youtube&utm_medium=affiliate&utm_campaign=firecrawl-switch-marketing-2026q3&utm_term=promptengineering Using Firecrawl? Send TinyFish your latest Firecrawl invoice and get it matched in TinyFish credits. The offer closes October 16, 2026. 🔗 Links • TinyFish: https://www.tinyfish.ai/compare/tinyfish-vs-firecrawl?utm_source=youtube&utm_medium=affiliate&utm_campaign=firecrawl-switch-marketing-2026q3&utm_term=promptengineering • TinyFish docs: https://docs.tinyfish.ai • TinyFish cookbook: https://github.com/tinyfish-io/tinyfish-cookbook • DeepSeek Harness Desktop download: https://www.deepseek.com/download • DeepSeek Harness on GitHub: https://github.com/deepseek-ai/deepseek-harness Model used in the demos: Gemini 3.8 Flash. DeepSeek Harness works with the model of your choice. 📍 Chapters 00:00 DeepSeek Harness Desktop and its plugin system 01:25 DeepSeek Harness UI: trajectories, cache hit rate, and 4 modes 03:24 Built-in web search and web fetch: what they can't do 05:06 TinyFish: web infrastructure for AI agents 06:56 Add the TinyFish MCP server to DeepSeek Harness 08:05 Demos: search, fetch, login, and a Hugging Face web agent 11:09 Monitors, saved logins, and cost #DeepSeek #AIAgents #MCP
