feat(web): multi-provider web search + Jina Reader fetch

README.md

@@ -169,7 +169,9 @@ nanobot channels login
 
 > [!TIP]
 > Set your API key in `~/.nanobot/config.json`.
-> Get API keys: [OpenRouter](https://openrouter.ai/keys) (Global) · [Brave Search](https://brave.com/search/api/) (optional, for web search)
+> Get API keys: [OpenRouter](https://openrouter.ai/keys) (Global)
+>
+> For web search capability setup, please see [Web Search](#web-search).
 
 **1. Initialize**
 
@@ -960,6 +962,102 @@ That's it! Environment variables, model prefixing, config matching, and `nanobot
 </details>
 
 
+### Web Search
+
+nanobot supports multiple web search providers. Configure in `~/.nanobot/config.json` under `tools.web.search`.
+
+| Provider | Config fields | Env var fallback | Free |
+|----------|--------------|------------------|------|
+| `brave` (default) | `apiKey` | `BRAVE_API_KEY` | No |
+| `tavily` | `apiKey` | `TAVILY_API_KEY` | No |
+| `jina` | `apiKey` | `JINA_API_KEY` | Free tier (10M tokens) |
+| `searxng` | `baseUrl` | `SEARXNG_BASE_URL` | Yes (self-hosted) |
+| `duckduckgo` | — | — | Yes |
+
+When credentials are missing, nanobot automatically falls back to DuckDuckGo.
+
+**Brave** (default):
+```json
+{
+  "tools": {
+    "web": {
+      "search": {
+        "provider": "brave",
+        "apiKey": "BSA..."
+      }
+    }
+  }
+}
+```
+
+**Tavily:**
+```json
+{
+  "tools": {
+    "web": {
+      "search": {
+        "provider": "tavily",
+        "apiKey": "tvly-..."
+      }
+    }
+  }
+}
+```
+
+**Jina** (free tier with 10M tokens):
+```json
+{
+  "tools": {
+    "web": {
+      "search": {
+        "provider": "jina",
+        "apiKey": "jina_..."
+      }
+    }
+  }
+}
+```
+
+**SearXNG** (self-hosted, no API key needed):
+```json
+{
+  "tools": {
+    "web": {
+      "search": {
+        "provider": "searxng",
+        "baseUrl": "https://searx.example"
+      }
+    }
+  }
+}
+```
+
+**DuckDuckGo** (zero config):
+```json
+{
+  "tools": {
+    "web": {
+      "search": {
+        "provider": "duckduckgo"
+      }
+    }
+  }
+}
+```
+
+| Option | Type | Default | Description |
+|--------|------|---------|-------------|
+| `provider` | string | `"brave"` | Search backend: `brave`, `tavily`, `jina`, `searxng`, `duckduckgo` |
+| `apiKey` | string | `""` | API key for Brave or Tavily |
+| `baseUrl` | string | `""` | Base URL for SearXNG |
+| `maxResults` | integer | `5` | Results per search (1–10) |
+
+> [!TIP]
+> Use `proxy` in `tools.web` to route all web requests (search + fetch) through a proxy:
+> ```json
+> { "tools": { "web": { "proxy": "http://127.0.0.1:7890" } } }
+> ```
+
 ### MCP (Model Context Protocol)
 
 > [!TIP]