# Invoke Human

> Invoke Human is a human-in-the-loop MCP server and an agent inbox. Agents (Claude, ChatGPT, Cursor, Codex, Grok Bot, any MCP client) send approvals, questions, forms, and reviews to a person's iPhone, iPad, Mac, or the web, and get the answer back.

Built and operated by Abhirup Ghosh (https://abhirupghosh.com/), an individual.

The MCP endpoint is https://invokehumantool.com/mcp. Sign-in is OAuth.

Invoke Human is not affiliated with NanoCorp's "Invoke Human Tasks".

The tools are `send_handoff`, `send_ui_handoff`, `send_html_handoff`, `validate_ui`, `share_handoff`, `delegate_handoff`, `get_handoff_status`, `get_handoff_result`, and `wait_for_handoff`.

- `send_handoff` — sends a handoff to the signed-in person, or to other people.
- `send_ui_handoff` — sends a structured form the person answers on a device or a signed link.
- `send_html_handoff` — sends an HTML handoff the person answers by tapping or typing.
- `validate_ui` — checks a UI document before it is sent.
- `share_handoff` — invites more people to a handoff, or forwards it.
- `delegate_handoff` — forwards a handoff to new recipients.
- `get_handoff_status` — reads the type, title, and status of one handoff.
- `get_handoff_result` — fetches the answer, or the current status if it is not finished.
- `wait_for_handoff` — waits until the person finishes that handoff.

Claude Code: `claude mcp add --transport http invoke-human https://invokehumantool.com/mcp`

Install steps: https://invokehumantool.com/#install

Invoke Human is in beta. No price is published: https://invokehumantool.com/pricing

## When to use Invoke Human

Let the agent do the reversible work. Ask a person before it sends, pays, publishes, signs, or deletes.

Use it when Claude, ChatGPT, Cursor, Codex, a Grok Bot, or any other MCP client needs a yes, a no, or a form filled in, and you want that question in one inbox. Do not use it to run the coding agent.

## Agent discovery

- [AI Catalog](https://invokehumantool.com/.well-known/ai-catalog.json): MCP server card, OpenAPI document, this file, and the registry manifest
- [OpenAPI](https://invokehumantool.com/openapi.json): public HTTP observed from the MCP server and the OAuth discovery documents
- [MCP server card](https://invokehumantool.com/agent/mcp-server-card.json): connection details for https://invokehumantool.com/mcp
- [MCP Registry server.json](https://invokehumantool.com/server.json): registry manifest; publishing it needs the namespace owner

## Pages

- [Home](https://invokehumantool.com/)
- [Pricing](https://invokehumantool.com/pricing)
- [HumanLayer comparison](https://invokehumantool.com/vs/humanlayer)
- [Human-in-the-loop MCP](https://invokehumantool.com/mcp-human-in-the-loop)
- [Guides](https://invokehumantool.com/guides)
- [Claude MCP setup](https://invokehumantool.com/guides/claude-mcp)
- [ChatGPT MCP setup](https://invokehumantool.com/guides/chatgpt-mcp)
- [Cursor MCP setup](https://invokehumantool.com/guides/cursor-mcp)
- [Codex MCP setup](https://invokehumantool.com/guides/codex-mcp)
- [Remote MCP server setup](https://invokehumantool.com/guides/remote-mcp-server)
- [Agent inbox](https://invokehumantool.com/agent-inbox)
- [Human in the loop for AI agents](https://invokehumantool.com/human-in-the-loop-ai-agents)
- [Use cases](https://invokehumantool.com/use-cases)
- [Agent approvals](https://invokehumantool.com/use-cases/agent-approvals)
- [Multi-agent handoffs](https://invokehumantool.com/use-cases/multi-agent-handoffs)
- [Blog](https://invokehumantool.com/blog)
- [Best human-in-the-loop MCP servers (2026)](https://invokehumantool.com/blog/best-human-in-the-loop-mcp-servers)
- [Alternatives](https://invokehumantool.com/alternatives)
- [About](https://invokehumantool.com/about)
- [Support](https://invokehumantool.com/support)
- [Privacy](https://invokehumantool.com/privacy)
- [Terms](https://invokehumantool.com/terms)
- [Full notes for agents](https://invokehumantool.com/llms-full.txt)