Rapp Agent Builder MCP Server

by kody-w Your server? Claim it

answering

Rapp Agent Builder is answering right now. Last checked 1 min ago. It exposes 8 tools. Last commit 6 Oct 2026.

Turn an idea or meeting transcript into a working single-file AI agent, check it, use it right away.

Uptime history 8 days of history · worst day 99%

8 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

1860 ms

Response time

average over 24h

Stars

last commit 6 Oct 2026

What changed 5

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 6 October 2026. No other catalogue keeps this.

6 Oct 5 tool descriptions were rewritten check_agent, find_agents, get_agent_template and 2 more

Rapp Agent Builder missed 2 checks this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add rapp-agent-builder --transport http https://rapp-agent-builder.azurewebsites.net/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "rapp-agent-builder": {
      "url": "https://rapp-agent-builder.azurewebsites.net/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.rapp-agent-builder]
url = "https://rapp-agent-builder.azurewebsites.net/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "rapp-agent-builder": {
      "url": "https://rapp-agent-builder.azurewebsites.net/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "rapp-agent-builder": {
      "url": "https://rapp-agent-builder.azurewebsites.net/mcp"
    }
  }
}

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

agent

check_agent

Checks a finished agent file against the template rules (manifest, naming, class, perform method, no hardcoded secrets). Call it on every agent you write, fix anything it reports, and call it again until it passes.

get_agent_code

Returns the full source of one agent from the registry, by its name (e.g. @bill/neuron_agent), so it can be read or adapted.

get_agent_template

Use this when the user wants to build an AI agent, assistant, bot or automation from an idea, a repetitive task, a process description, or a meeting transcript (for example: automate invoices, triage support tickets, summarize meetings, follow up with leads). Returns the official single-file agent template and its rules. Fill it in yourself from what the user described, then call check_agent on the finished file before showing it to the user. Then call use_agent_here so the user can use it right away in this chat.

agents

find_agents

Searches the public agent registry (about 1,700 single-file agents) for agents that already do what the user wants, for example when they ask 'is there an AI tool for...' or want a ready-made automation instead of building one. Use it before building from scratch, or when the user asks whether an agent exists for a task.

how

how_to_run_agent

Optional, for later: how to keep an agent running on the user's own computer with the free Brainstem. Only offer this after the user has used the agent in the chat and wants to keep it.

request

request_service

Use when the person wants something none of these tools can do and says yes to passing the request on. Records only the request text they agree to send (no name or contact). Ask before calling it.

share_agent

Use only when the user says they want to share an agent they built. Checks the agent and scans it for personal details (emails, phone numbers, secrets), then explains how to publish it to the free public agent registry under their own GitHub account. Nothing is published by this tool.

use

use_agent_here

Use this right after an agent passes check_agent, or whenever the user wants to try an agent. Returns a short Python runner so you can run the agent in this chat with your own Python tool on the user's own data (pasted text, an uploaded spreadsheet, a list). Nothing to install. If Python is unavailable, apply the agent's logic yourself by reading its code. Ask the user for their real data, run the agent, and show the result in plain words.

Endpoints

URL	Transport	State	Latency	Checked
https://rapp-agent-builder.azurewebsites.net/mcp	streamable-http	answering	5300 ms	1 min ago

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same job, measured the same way

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Video Vision MCP

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Rapp Agent Builder — questions

Answers built from our own checks of this server.

What can Rapp Agent Builder do?

It exposes 8 tools, read directly from the server on our last check. Among them: check_agent, find_agents, get_agent_code, get_agent_template, how_to_run_agent, request_service and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Rapp Agent Builder working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 1860 ms. The bar chart above shows every period we have measured.

How do I connect Rapp Agent Builder?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Rapp Agent Builder need an API key?

No. Rapp Agent Builder completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.

Is Rapp Agent Builder open source?

We cannot say either way: written in JavaScript and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.