AgentIndex icon
AgentIndex
cloister logo
cloister
★ 13
vs
tunnel-client logo
tunnel-client
★ 589

cloister vs tunnel-client

cloister: Cloister is a platform designed to bundle AI tooling and serve it through a single, traceable endpoint, compatible with various AI harnesses like Claude Code and Cursor. It ensures tools operate securely by isolating secrets, logging every call for auditability, and providing consistent deployment across local and production environments.; tunnel-client: `tunnel-client` is a customer-run agent that securely connects private or localhost Model Context Protocol (MCP) servers to OpenAI products like ChatGPT and Codex through an OpenAI-hosted tunnel. It enables secure access for AI models without exposing the MCP server to the public internet, simplifying deployments in restricted network environments.

01

TL;DR

cloister logo
cloisterLLM Infra · ★ 13

Bundling and serving custom AI agent tools for external harnesses like Claude Code or Cursor.

Read cloister full review →
tunnel-client logo
tunnel-clientLLM Infra · ★ 589

Connecting a private or localhost MCP server to OpenAI-hosted products like ChatGPT when public internet access is restricted.

Read tunnel-client full review →
02

Side-by-Side Comparison

Field
cloister logocloister
tunnel-client logotunnel-client
Category
LLM Infra
LLM Infra
Stars
★ 13
★ 589
License
AGPL-3.0
Apache-2.0
Install Command
leyline daemon --mcp-port 8384 && pnpm install && task dev:bootstrap && task dev
make admin-ui && go build -o bin/tunnel-client ./cmd/client
Updated
1w ago
1d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
AI Tooling, Edge Router, Serverless
Secure Tunnel, API Proxy, LLM Connectivity
03

Features

cloister logocloister
01Secure Credential Isolation: Tools never directly access secrets; Cloister handles API calls, preventing leaks.
02Comprehensive Audit Trail: Every state-changing call generates a signed, tamper-evident receipt for verification.
03Consistent Deployment: The exact same configuration runs locally and deploys to Cloudflare Workers without modification.
04Protocol Agnostic Routing: Functions as an edge router and bundle host, supporting MCP and other HTTP-shaped tenants.
05Containerized Tools with Sandboxing: Each tool runs in its own sandboxed Workerd isolate for enhanced security.
tunnel-client logotunnel-client
01Securely connects private or localhost MCP servers to OpenAI products like ChatGPT and Codex.
02Operates as a daemon with health checks, metrics, and an administrative UI for operational visibility.
03Supports flexible MCP server integration via Streamable HTTP, stdio, or in-memory transports.
04Offers an embeddable Go SDK for direct integration into Go applications.
04

Use Cases

cloister logocloister
↳Bundling and serving custom AI agent tools for external harnesses like Claude Code or Cursor.
↳Deploying AI tooling with consistent configurations from local development to Cloudflare Workers production environments.
↳Ensuring secure execution of AI tools by preventing direct access to sensitive API keys and tokens.
↳Maintaining an auditable record of all AI tool interactions for compliance and post-factum verification.
tunnel-client logotunnel-client
↳Connecting a private or localhost MCP server to OpenAI-hosted products like ChatGPT when public internet access is restricted.
↳Deploying an operator-visible daemon for an MCP server before connecting it to external APIs, ensuring readiness and observability.
↳Integrating directly into a Go application using the Go SDK to bridge an in-memory MCP server with OpenAI tunnels.
05

Best For

cloister logocloister
—
tunnel-client logotunnel-client
Hidden Gem
FAQ

FAQ

What is the difference between cloister and tunnel-client?
Both cloister and tunnel-client are in the LLM Infra category. cloister has 13 stars, while tunnel-client has 589 stars.
Which is better, cloister or tunnel-client?
The best choice depends on your use case. Choose cloister if Bundling and serving custom AI agent tools for external harnesses like Claude Code or Cursor., and tunnel-client if Connecting a private or localhost MCP server to OpenAI-hosted products like ChatGPT when public internet access is restricted..
Is cloister free or open source?
Yes, cloister is open source on GitHub (AGPL-3.0).
Is tunnel-client free or open source?
Yes, tunnel-client is open source on GitHub (Apache-2.0).
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Related

Alternatives to cloister →Alternatives to tunnel-client →cloister details →tunnel-client details →