Gpt Plugin

AgentStack — GPT (OpenAI) integration

Integration of AgentStack with ChatGPT via GPT Actions: use a Custom GPT to create projects, manage API keys, get stats, and call one MCP tool (agentstack.execute) whose current actions come from the live /mcp/actions catalog.

AgentStack is a full backend ecosystem: 8DNA hierarchical data, Rules Engine, Buffs (trials/subscriptions), Payments, and MCP tools for Projects, Auth, Scheduler, Analytics, Webhooks, Notifications, and Wallets.

What’s in this repo

| Item | Description | |------|-------------| | OpenAPI schema | openapi/agentstack-mcp.yaml — one action (execute MCP tool) for GPT Actions; supports API Key and OAuth2 auth modes. | | Instructions | GPT_INSTRUCTIONS.md — copy into your Custom GPT Instructions field. | | Quick Start | GPT_QUICKSTART.md — get API key, create Custom GPT, add Action, paste instructions. | | Artifact layout | ARTIFACTS.md — where each file lives and what it’s for. |

Quick Start

1. Get an API key (anonymous project or account) — see [GPTQUICKSTART.md](GPTQUICKSTART.md).
2. Create a Custom GPT and add an Action with the OpenAPI schema; choose authentication mode:

• API Key (X-API-Key) for service-style access.
• OAuth2 (AgentStack as IdP) for end-user sign-in.

1. Paste the instructions from [GPTINSTRUCTIONS.md](GPTINSTRUCTIONS.md).
2. Use the GPT (e.g. “Create a project called Test”, “List my projects”).

What you can do

With the Custom GPT and Action configured, you can ask for any action exposed by the generated MCP capability matrix via agentstack.execute. Example prompts by domain:

| Domain | Example prompts | |--------|-----------------| | Projects | "List my projects", "Get stats for my project", "Create a project named Test" | | 8DNA / Data | "Store project data at key config.theme", "Read user data" | | Rules Engine | "Create a rule when user signs up", "List logic rules" | | Buffs | "Give user a 7-day trial", "List active buffs" | | Payments | "Create a payment", "Get wallet balance" | | Auth | "Get my profile", "Quick auth with email" | | Scheduler, Analytics, Webhooks, Notifications, Wallets | "Schedule a task", "Get analytics", "List webhooks" |

Full tool list and parameters: MCP Capability Matrix. When to use which tool: CONTEXTFORAI in the AgentStack repo.

Documentation

• This plugin: github.com/agentstacktech/gpt-plugin
• Quick Start: [GPTQUICKSTART.md](GPTQUICKSTART.md)
• Full MCP tool list: MCP Capability Matrix in the main AgentStack repo
• Plugins index and comparison (Cursor, Claude, GPT, VS Code): docs/plugins/README.md in the main repo

Links

• AgentStack: agentstack.tech
• LinkedIn: linkedin.com/company/agentstacktech
• GitHub: github.com/agentstacktech

License

MIT. See [LICENSE](LICENSE).

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: agentstacktech
• Source: agentstacktech/gpt-plugin
• License: MIT
• Homepage: https://agentstack.tech

Install and usage instructions live in the source repository linked above.