Does Viajante work with ChatGPT (Codex)?
Yes. Viajante passed every step of our test in ChatGPT (Codex) on Oct 19, 2026: it installed, connected, its tools were visible, and an agent used it to finish a real task.
Result
ResultPassed
Date testedOct 19, 2026
Plan tested onChatGPT Plus
App versionCodex CLI 0.162.0-alpha.17.2
Server package@viajante/mcp 1.5.2
Connect timeconnect time not recorded
Modelgpt-6-luna (reasoning low)
Steps
- install OK
- connect OK
- tools visible OK
- agent task: airport lookup OKkeyless public airport lookup
From our own harness run, not the maker’s claims. How we test.
Versions tested
Codex CLI 0.162.0-alpha.17.2 · @viajante/mcp 1.5.2 · connect time not recorded · tested Oct 19, 2026
Server package tested: @viajante/mcp 1.5.2 (npm, Node v20.19.2; resolved 2026-10-19)
What happened in this run
Install config we used
[mcp_servers.viajante]
command = "npx"
args = ["-y", "@viajante/mcp"]Connection check
server answered tool calls during the taskTools check
verified via task step: agent saw and called the server's tools
Agent task: airport lookup
- Tool calls, in order:
viajante:lookup_airports
Raw details from our harness log for this run. Secrets redacted.
Set it up in ChatGPT (Codex)
Copy-paste config for every app is on the Viajante page. Not connecting? ChatGPT (Codex) MCP troubleshooting.
Other apps we tested it in: Claude Code (passed) · Cursor (passed) · Claude Desktop (passed).