MCP.Market

Rapp Agent Builder MCP server

online · 100% uptime
by kody-w·io.github.kody-w/rapp-agent-builder·v1.0.0
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Turn an idea or meeting transcript into a working single-file AI agent, check it, use it right away.

B81/100grade B
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Safety scan
B81/100

full report

Adoption
Growing

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If you have run it, two minutes of your experience saves the next person an afternoon.

Rapp Agent Builder tools (8, 1 write)

write = sends, deletes, buys or posts
  • check_agentFree

    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.

  • find_agentsFree

    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.

  • get_agent_codeFree

    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_templateFree

    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.

  • how_to_run_agentwrite actionFree

    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_serviceFree

    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_agentFree

    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_agent_hereFree

    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.

Public scan report

scanner v0.1.10 · 2026-10-14 · same rubric, same numbers if you re-run it

1 high
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 147ms20/20
  • Tool poisoning8 tool descriptions checked15/15
  • Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
  • Maintenancelast push 9 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Findings (1)

  • highWrite-action tools reachable without authenticationauth.open-write
Overall 81/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Rapp Agent Builder compares

Against every graded AI and agents MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
81/100
higher than 63% of 4,460 AI and agents servers
Tools
8
the typical AI and agents server has 6
Tools that change things
13%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote AI and agents server answers 100%
Response time
193 ms
faster than 67% of 2,331 AI and agents servers

What its tools let an agent do: 6 read · 1 change · 1 send or post

Install Rapp Agent Builder in Claude Code, Cursor or VS Code

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

What the publisher says

From the Rapp Agent Builder repository's README, as published. We do not edit it. Read it on GitHub

RAPP Agent Builder (ChatGPT app)

A ChatGPT app that turns an idea or a meeting transcript into a working single-file RAPP agent. ChatGPT's own model writes the agent; this MCP server supplies the template, checks the result, searches the public RAPP Agent Registry, and explains how to run the agent in the free RAPP Brainstem.

It sits on top of the ecosystem and never changes the Brainstem: it reads the public registry and points at the public installer.

  • MCP endpoint: https://rapp-agent-builder.azurewebsites.net/mcp (streamable HTTP, stateless, JSON responses)
  • Site, privacy, terms: https://kody-w.github.io/rapp-chatgpt/

Tools

Develop

node build_template.mjs ../RAR/template_agent.py   # refresh the embedded template
npx wrangler dev                                   # local server on :8787
node test/check_real_agents.mjs ../RAR             # checker vs. the template and every registry agent
test/mcp_smoke.sh http://localhost:8787            # drive the MCP endpoint
npx wrangler deploy                                # Cloudflare host
azure/deploy.sh                                    # or Azure Functions

Listing copy for the ChatGPT app directory is in SUBMISSION.md.

Nothing above is checked by us. What we check is on the safety report.

Rapp Agent Builder: common questions

Is Rapp Agent Builder MCP server safe?
Mostly: it is graded B (81/100). Read the Rapp Agent Builder safety report
How do I install Rapp Agent Builder?
It runs remotely at rapp-agent-builder.azurewebsites.net. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Rapp Agent Builder need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Rapp Agent Builder maintained?
The last commit was 30 days ago (2026-10-05). The latest release is v1.0.0.
Is Rapp Agent Builder up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of Rapp Agent Builder?
Servers from other publishers that do the same job: Basic Memory MCP server, Agent-Native Forms MCP server and Openflowkit MCP server.
How does Rapp Agent Builder compare with other AI and agents MCP servers?
safety score 81/100 (higher than 63% of 4,460 AI and agents servers); tools 8 (the typical AI and agents server has 6); tools that change things 13% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to Rapp Agent Builder

Same job from other publishers: the closest match first, then the best rated.

  • Basic Memory
    Local-first knowledge management with bi-directional LLM sync via Markdown files.
    B
  • Agent-Native Forms
    Agent-Native form builder - create, edit, and manage forms
    More from BuilderIO →
    A
  • Openflowkit
    Architecture diagrams for your agent: draw on the live OpenFlowKit canvas or edit diagram files.
    A
  • Kiln
    Spawn an object into existence: describe it, and your agent designs it, checks it, and 3D prints it.
    B
  • Vibe Check
    Metacognitive AI agent oversight: adaptive CPI interrupts for alignment, reflection and safety
    B

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