AgentIndex icon
AgentIndex
tunnel-client logo
tunnel-client
★ 589
vs
cap-evolve logo
cap-evolve
★ 66

tunnel-client vs cap-evolve

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.; cap-evolve: cap-evolve is an honesty-guaranteed framework that optimizes AI agent capabilities like prompts, tools, and skills by learning from failed evaluation traces. It automates the loop of evaluation, diagnosis, candidate generation, and validation, ensuring improvements are significant and honest.

01

TL;DR

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 →
cap-evolve logo
cap-evolveLLM Infra · ★ 66

Optimizing AI agent capabilities when developing with Claude Code plugin.

Read cap-evolve full review →
02

Side-by-Side Comparison

Field
tunnel-client logotunnel-client
cap-evolve logocap-evolve
Category
LLM Infra
LLM Infra
Stars
★ 589
★ 66
License
Apache-2.0
Apache-2.0
Install Command
make admin-ui && go build -o bin/tunnel-client ./cmd/client
git clone https://github.com/skillberry-ai/cap-evolve.git && cd cap-evolve && python3 -m venv .venv && source .venv/bin/activate && pip install ./core
Updated
1d ago
1d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
Secure Tunnel, API Proxy, LLM Connectivity
AI Agent Optimization, Prompt Engineering, Tool Code Optimization
03

Features

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.
cap-evolve logocap-evolve
01Optimizes more than prompts, including executable tool code and entire skill packages.
02Learns from real agent failures and per-task causal feedback to make robust improvements.
03Ensures honest evaluation through a significance gate and a sealed, scored-once test split.
04Provides a dashboard to inspect every change, cost, timing, diff, and pass/fail heatmap.
04

Use Cases

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.
cap-evolve logocap-evolve
↳Optimizing AI agent capabilities when developing with Claude Code plugin.
↳Integrating and refining agents from various coding-agent hosts like Codex, Gemini, or Droid.
↳Custom integration for developers who want to wire their own agent adapters and drive the CLI directly.
↳Applying pre-built adapter templates for popular benchmarks and data formats (e.g., JSONL, HuggingFace, tau2-bench).
05

Best For

tunnel-client logotunnel-client
Hidden Gem
cap-evolve logocap-evolve
—
FAQ

FAQ

What is the difference between tunnel-client and cap-evolve?
Both tunnel-client and cap-evolve are in the LLM Infra category. tunnel-client has 589 stars, while cap-evolve has 66 stars.
Which is better, tunnel-client or cap-evolve?
The best choice depends on your use case. Choose tunnel-client if Connecting a private or localhost MCP server to OpenAI-hosted products like ChatGPT when public internet access is restricted., and cap-evolve if Optimizing AI agent capabilities when developing with Claude Code plugin..
Is tunnel-client free or open source?
Yes, tunnel-client is open source on GitHub (Apache-2.0).
Is cap-evolve free or open source?
Yes, cap-evolve is open source on GitHub (Apache-2.0).
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Related

Alternatives to tunnel-client →Alternatives to cap-evolve →tunnel-client details →cap-evolve details →