Selenix-MCP

Instructions

Implementation Reference

• src/tools.ts:30-48 (registration)

  Tool registration for get_search_html in tools.ts.

    name: 'get_search_html',
    description:
      'Search page HTML by regex pattern and return surrounding HTML context for matches.',
    inputSchema: {
      type: 'object' as const,
      properties: {
        regex: {
          type: 'string',
          description: 'Regular expression pattern to search for',
        },
        index: {
          type: 'number',
          description: 'Optional 0-based index of which match to return',
        },
        tab_id: { type: 'string', description: 'Optional tab/window ID' },
      },
      required: ['regex'],
    },
  },

• src/index.ts:21-25 (handler)

  The tool handler in index.ts dynamically calls the bridge client using the tool name.

  server.setRequestHandler(CallToolRequestSchema, async (request) => {
    const { name, arguments: args } = request.params
  
    try {
      const result = (await bridge.call(name, (args as Record<string, unknown>) || {})) as Record<string, unknown>

• src/bridge-client.ts:24-72 (helper)

  The BridgeClient performs the actual HTTP request to the backend service. When get_search_html is called, this client maps it to /api/get_search_html.

  export class BridgeClient {
    async call(endpoint: string, body: Record<string, unknown> = {}): Promise<unknown> {
      // Re-read config on every call so we pick up new tokens after Selenix restarts
      const config = readConfig()
  
      return new Promise((resolve, reject) => {
        const data = JSON.stringify(body)
        const req = http.request(
          {
            hostname: '127.0.0.1',
            port: config.port,
            path: `/api/${endpoint}`,
            method: 'POST',
            headers: {
              'Content-Type': 'application/json',
              Authorization: `Bearer ${config.token}`,
              'Content-Length': Buffer.byteLength(data),
            },
            timeout: 180000, // 3 minutes for long-running operations like run_test
          },
          (res) => {
            let responseData = ''
            res.on('data', (chunk: string) => (responseData += chunk))
            res.on('end', () => {
              try {
                resolve(JSON.parse(responseData))
              } catch {
                resolve({ raw: responseData })
              }
            })
          }
        )
        req.on('error', (err) =>
          reject(
            new Error(
              `Cannot connect to Selenix bridge at 127.0.0.1:${config.port}. ` +
                `Is Selenix running with MCP Server enabled? (${err.message})`
            )
          )
        )
        req.on('timeout', () => {
          req.destroy()
          reject(new Error('Request timed out after 180 seconds'))
        })
        req.write(data)
        req.end()
      })
    }
  }