Custom API
Top open-source Custom API AI systems, agents, and MCP tools.
Discover and install verified Custom API AI systems, autonomous agent skills, and Model Context Protocol servers on AIStoreHub. Reusable, security-scanned, and ready for 1-click execution in Cursor, Claude Code, and terminal workflows.
Available AI Systems & Skills (25)
Open in Advanced FilterMultiple windows for Claude Desktop with different APIs at the same time: keep your official Claude subscription in one window and run other windows on custom / third-party APIs (cc-switch). Windows. 多开 Claude Desktop,多个窗口同时使用不同 API(官方订阅 + 第三方 API 同时工作)。
An open-source AI agent for Roblox Studio. Builds, scripts, and playtests in your place using your ChatGPT/Claude subscription or custom API.
7.4 billion tokens per month. 34 free LLM providers. 635 free model endpoints. All behind one /v1 endpoint, plus any custom OpenAI-compatible endpoint. Smart routing, automatic failover, encrypted keys. Personal experimentation only.
Autonomous deep research agent workflow that crawls over 20+ sources, aggregates findings, filters citations, and compiles research papers.
Open GUI agent framework for operating computer desktop environments across macOS, Windows, and Linux using visual grounded navigation.
Open source file-system and knowledge based agent template. Build AI agents that stay up to date with your knowledge base
Full-featured GUI for Claude Code CLI in VS Code — Windows (no WSL) & macOS. Third-party API, MCP plugins, Skills, Hooks, real-time token tracking. Actively maintained.
Flow-Like: Strongly Typed Enterprise Scale Workflows. Built for scalability, speed, seamless AI integration and rich customization.
Open-source AI pentest and compliance-readiness CLI by NullSquare.
Wrap Antigravity, ChatGPT Codex, Claude Code, Grok Build, Muse Code, Devin as an OpenAI/Gemini/Claude/Codex compatible API service, allowing you to enjoy the free Gemini Series, GPT Series, Grok Series, Claude model through API
The extensible power-user platform for Google Antigravity. Adds a native In-App Browser, animated Desktop Pets, revamped Gemini UI, and custom BYOK Gemini Pro keys.
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.
HeyClaude (formerly Claude Pro Directory) is a searchable collection of pre-built AI skills, agents, MCP servers, guides, hooks, statuslines, and other custom configs, designed to enhance Claude, Codex, Cursor, OpenClaw, and various other agentic workflows/platforms.
Source-available agent platform for Global × China enterprises — wire every system through one agent core. Self-hosted, any LLM.
Your own Claude Code UI, sandbox, in-browser VS Code, terminal, multi-provider support (Anthropic, OpenAI, GitHub Copilot, OpenRouter), custom skills, and MCP servers.
An open-source PHP CMS for building custom websites and APIs. Extend it with modular Apps and Themes, use its REST API, and connect AI agents through a built-in MCP server and permission-based access controls.
Tiledesk Server is the main API component of the Tiledesk platform 🚀 Tiledesk is an open-source alternative to Voiceflow, allowing you to build advanced LLM-powered agents with easy human-in-the-loop (HITL) when necessary.
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Open-source, self-hosted, extensible Agent platform built around ReAct and Harness engineering, with AI customer support as its first complete reference application.
PentestAgent is an AI agent framework for black-box security testing, supporting bug bounty, red-team, and penetration testing workflows.
The local-first sidebar AI agent for ComfyUI — runs on your own Claude OR ChatGPT subscription (no API keys, no extra LLM costs). Drives your live graph: edits, workflows & installs in natural language. The panel UI for comfyui-mcp, the agent-native control plane for ComfyUI.
Adnify—A lightweight, highly customizable AI Agent Editor.It delivers a superior experience beyond mainstream AI coding tools, featuring instant startup and lag-free performance.
Build mods for Claude Code: Hook any request, modify any response, /model "with-your-custom-model", intelligent model routing using your logic or ours, and even use your Claude subscription as an API
Open-source, self-hosted AI customer service platform built around ReAct agents. Agents retrieve knowledge, call tools, and prepare actions; humans confirm high-impact writes such as ticket creation. Apache-2.0, Postgres-only.
🚀 Custom modes for Roo Code VS Code extension - Enhanced AI coding assistance configurations
Build & Monetize for Custom API
Have you created an autonomous agent, MCP server, or Claude Code skill for Custom API? Publish it to AIStoreHub with dual-currency checkout (USD $ + INR ₹) and earn 85–90% net revenue.