{
  "$type": "site.standard.document",
  "bskyPostRef": {
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    "uri": "at://did:plc:lk3jfj3zq4k4wxnk474axylu/app.bsky.feed.post/3mewrkpznzy52"
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  "path": "/t/intermittent-mcp-tool-discovery-failure-in-agent-builder-http-424-but-direct-openai-agents-calls-succeed/1373803#post_3",
  "publishedAt": "2026-02-15T23:20:57.000Z",
  "site": "https://community.openai.com",
  "tags": [
    "@OpenAI_Support"
  ],
  "textContent": "Hey @OpenAI_Support , quick update with an important change in behavior:\n\nStarting Thursday, the Agent Builder workflow is no longer intermittently failing, it cannot connect at all even once. Tool discovery fails every time now.\n\nTo rule out any issues with the remote MCP server itself, I tested using MCP Inspector against the exact same endpoint and API key. MCP Inspector connects reliably and is able to:\n\nList tools successfully\n\nExecute tool calls without any issues\n\nSo the MCP server appears healthy, and the problem seems isolated specifically to Agent Builder’s MCP integration, not the backend.\n\nHappy to share more logs or repro details if helpful.\n\nThanks again for looking into this.\n\n\n\n",
  "title": "Intermittent MCP tool discovery failure in Agent Builder (HTTP 424) but direct @openai/agents calls succeed"
}