feat(mcp): add multi-provider websearch support

src/mcp/index.ts

@@ -1,7 +1,8 @@
-import { websearch } from "./websearch"
+import { createWebsearchConfig } from "./websearch"
 import { context7 } from "./context7"
 import { grep_app } from "./grep-app"
 import type { McpName } from "./types"
+import type { OhMyOpenCodeConfig } from "../config/schema"
 
 export { McpNameSchema, type McpName } from "./types"
 
@@ -13,18 +14,18 @@ type RemoteMcpConfig = {
   oauth?: false
 }
 
-const allBuiltinMcps: Record<McpName, RemoteMcpConfig> = {
-  websearch,
-  context7,
-  grep_app,
-}
+export function createBuiltinMcps(disabledMcps: string[] = [], config?: OhMyOpenCodeConfig) {
+  const allBuiltinMcps: Record<McpName, RemoteMcpConfig> = {
+    websearch: createWebsearchConfig(config?.websearch),
+    context7,
+    grep_app,
+  }
 
-export function createBuiltinMcps(disabledMcps: string[] = []) {
   const mcps: Record<string, RemoteMcpConfig> = {}
 
-  for (const [name, config] of Object.entries(allBuiltinMcps)) {
+  for (const [name, mcp] of Object.entries(allBuiltinMcps)) {
     if (!disabledMcps.includes(name)) {
-      mcps[name] = config
+      mcps[name] = mcp
     }
   }
 

src/mcp/websearch.ts

@@ -1,10 +1,44 @@
-export const websearch = {
-  type: "remote" as const,
-  url: "https://mcp.exa.ai/mcp?tools=web_search_exa",
-  enabled: true,
-  headers: process.env.EXA_API_KEY
-    ? { "x-api-key": process.env.EXA_API_KEY }
-    : undefined,
-  // Disable OAuth auto-detection - Exa uses API key header, not OAuth
-  oauth: false as const,
+import type { WebsearchConfig } from "../config/schema"
+
+type RemoteMcpConfig = {
+  type: "remote"
+  url: string
+  enabled: boolean
+  headers?: Record<string, string>
+  oauth?: false
 }
+
+export function createWebsearchConfig(config?: WebsearchConfig): RemoteMcpConfig {
+  const provider = config?.provider || "exa"
+
+  if (provider === "tavily") {
+    const tavilyKey = process.env.TAVILY_API_KEY
+    if (!tavilyKey) {
+      throw new Error("TAVILY_API_KEY environment variable is required for Tavily provider")
+    }
+
+    return {
+      type: "remote" as const,
+      url: "https://mcp.tavily.com/mcp/",
+      enabled: true,
+      headers: {
+        Authorization: `Bearer ${tavilyKey}`,
+      },
+      oauth: false as const,
+    }
+  }
+
+  // Default to Exa
+  return {
+    type: "remote" as const,
+    url: "https://mcp.exa.ai/mcp?tools=web_search_exa",
+    enabled: true,
+    headers: process.env.EXA_API_KEY
+      ? { "x-api-key": process.env.EXA_API_KEY }
+      : undefined,
+    oauth: false as const,
+  }
+}
+
+// Backward compatibility: export static instance using default config
+export const websearch = createWebsearchConfig()

src/plugin-handlers/config-handler.ts

@@ -447,7 +447,7 @@ export function createConfigHandler(deps: ConfigHandlerDeps) {
       : { servers: {} };
 
     config.mcp = {
-      ...createBuiltinMcps(pluginConfig.disabled_mcps),
+      ...createBuiltinMcps(pluginConfig.disabled_mcps, pluginConfig),
       ...(config.mcp as Record<string, unknown>),
       ...mcpResult.servers,
       ...pluginComponents.mcpServers,