Tunnel Client MCP Server
by openaiCustomer-run client for Secure MCP Tunnel: connect private or localhost MCP servers to ChatGPT, Codex, the Responses API, and AgentKit without exposing them to the public internet.
Tunnel Client is an open-source mcp server by openai, written mainly in Go, with 612 GitHub stars and the Apache-2.0 license. Its code was last updated Oct 31, 2026.
Scan summary: scanned Nov 5, 2026 at commit fb43d56. Seen able to read environment and secrets. Scan policy
What Tunnel Client can touch
- Our checks did not find this. The tool may still do it.Run shell commandsNot seen in this scan
- Our checks did not find this. The tool may still do it.Run dynamic codeNot seen in this scan
- Our checks did not find this. The tool may still do it.Read or write filesNot seen in this scan
- Seen in this scan, either in the code or while it ran.Read environment and secretsFound in the code by our scan
- Our checks did not find this. The tool may still do it.Control a web browserNot seen in this scan
- Our checks did not find this. The tool may still do it.Connect to databasesNot seen in this scan
- Our checks did not find this. The tool may still do it.Read or send messagesNot seen in this scan
- Our checks did not find this. The tool may still do it.Touch money or tradingNot seen in this scan
- Our checks did not find this. The tool may still do it.Connect to the internetNot run in this scan
"Not seen" means our checks did not find it, and the tool may still do it. Covers commit fb43d56, Nov 5, 2026. See the scan policy.
Before you install Tunnel Client
AgenticMart scanned Tunnel Client on Nov 5, 2026 with automated checks for hidden code, known-malicious packages, leaked secrets and vulnerable dependencies. The result covers one commit under our scan policy, so review what access you give it and check any advisories shown here.
What it can access
- An MCP server is a program your AI app starts and talks to. A local one runs with your user's permissions: it can see the files, environment variables and network your account can.
Before you install
- Pin the version you reviewed instead of always installing the latest release.
- Read the tool list or scripts before the first run, and keep approval prompts on for actions that write, send or delete.
- Maintained by openai on GitHub, 612 stars and 129 forks. Popularity is not proof of safety.
- Last code change: Oct 31, 2026.
- Open-source license: Apache-2.0.
Tunnel Client is an open-source mcp server by openai, written mainly in Go. Customer-run client for Secure MCP Tunnel: connect private or localhost MCP servers to ChatGPT, Codex, the Responses API, and AgentKit without exposing them to the public internet.
At a glance
- Stars
- 612
- Forks
- 129
- Language
- Go
- License
- Apache-2.0
- Created
- Dec 2025
- Last update
- Oct 31, 2026
- Type
- MCP Server
- Price
- Free
Topics
Questions about Tunnel Client
What is Tunnel Client?
Customer-run client for Secure MCP Tunnel: connect private or localhost MCP servers to ChatGPT, Codex, the Responses API, and AgentKit without exposing them to the public internet.
Who maintains Tunnel Client?
Tunnel Client is maintained by openai on GitHub (openai/tunnel-client). AgenticMart lists it from public repository data.
Is Tunnel Client safe to use?
AgenticMart scanned Tunnel Client on Nov 5, 2026 with automated checks for hidden code, known-malicious packages, leaked secrets and vulnerable dependencies. The result covers one commit under our scan policy, so review what access you give it and check any advisories shown here.
What license does Tunnel Client use?
It is published under the Apache-2.0 license.
Tunnel Client alternatives
View more →Similar mcp servers in Developer Tools, ranked by GitHub stars. Compare licence, recent activity and scan status before you choose.
| Name | Stars | Licence | Last updated | Scan |
|---|---|---|---|---|
| Tunnel Client (this page) openai | 612 | Apache-2.0 | Oct 31, 2026 | Scanned, no flagged issues |
| MCP Use mcp-use | 11k | MIT | Oct 30, 2026 | Scanned, no flagged issues |
| MobileBuildMCP getsentry | 6.5k | MIT | Nov 1, 2026 | Scanned, no flagged issues |
| Gemini Notebook MCP CLI jacob-bd | 6.4k | MIT | Oct 27, 2026 | Scanned, no flagged issues |
| Mcporter openclaw | 5.1k | MIT | Oct 27, 2026 | Scanned, no flagged issues |
| Flint Chart microsoft | 4.5k | MIT | Nov 1, 2026 | Scanned, no flagged issues |