DeepSeek deepseek-flash Web Search and URL Reading Setup

DeepSeek's web tools guide says the deepseek-flash model can search the web and read links from the last user message once deepseek_web_search and deepseek_read_url are declared. With thinking enabled, the search becomes deep thinking search with up to about 20 tool calls. The guide gives no wording advice, so the question text below is an untested starting point.

{
  "model": "deepseek-flash",
  "thinking": {
    "type": "enabled"
  },
  "tools": [
    {
      "type": "deepseek_web_search",
      "name": "deepseek_web_search"
    },
    {
      "type": "deepseek_read_url",
      "name": "deepseek_read_url"
    }
  ],
  "messages": [
    {
      "role": "user",
      "content": "Question: {{RESEARCH_QUESTION}}. Read these pages first: {{URL_1}} and {{URL_2}}. Then search for anything they leave out. Answer in under 200 words. After each claim, give the source URL and the page date if it shows one. If no source supports a claim, say so instead of guessing."
    }
  ]
}

Send it to the Messages endpoint at api.deepseek.com/anthropic/v1/messages with an x-api-key header.