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Practical guide

AI agent builder for ChatGPT and Claude

An AI agent builder for ChatGPT and Claude helps give your business AI a home beyond a single conversation. Describe the job in Prostir Builder, test its knowledge and authorized actions, then verify the connection in each supported client.

Build for ChatGPT and Claude

Before you read

What gets published

You publish one Prostir agent, get a stable HTTPS endpoint, and connect the same agent to ChatGPT, Claude, Cursor, or another MCP-capable client when that client's account, connector, transport, and auth rules allow it.

Best for

Creators, consultants, agencies, and SaaS companies who want one AI agent builder workflow for ChatGPT, Claude, Cursor, and similar MCP-ready clients without building a custom backend.

Where the work happens

AI agent builder for ChatGPT · AI agent builder for Claude · No-code AI agent builder · Remote MCP endpoint

01

What is an AI agent?

  • An AI agent is a hosted assistant that follows instructions, answers from selected knowledge, and can call approved tools to complete a job.
  • A published agent with instructions, knowledge, tools, memory rules, access mode, and runtime model selection.
  • A stable remote MCP endpoint over HTTPS so ChatGPT, Claude, Cursor, or another MCP-ready client has one connection target.
  • Auth, users, payments, quotas, and revocation rules behind the agent, instead of scattered scripts and local config files.
02

How to publish an agent in ChatGPT and Claude

Publish the Agent once in Prostir, then add its HTTPS /mcp URL to each supported client. ChatGPT uses custom MCP apps; Claude uses custom connectors. The account, workspace permissions and authentication setup determine which options you can use. Follow the provider’s current instructions if its labels change.

  1. 01
    Create the agent.

    Write the job, target audience, refusal rules, and first answers in plain language.

  2. 02
    Attach knowledge and tools.

    Add docs, FAQs, policies, API tools, and reusable skills so the agent can answer from source material instead of a blank prompt.

  3. 03
    Choose access and billing.

    Keep the agent public or protect it with access grants. For paid access, eligible Stripe Connect sellers can offer one-time payments and subscriptions; Rozetka Pay is only for one-time UAH sales in Ukraine. The provider settles directly to the seller, who remains responsible for taxes, delivery and fulfillment, refunds, disputes, warranties, and customer obligations.

  4. 04
    Publish the agent.

    Prostir creates the hosted AI surface and remote MCP endpoint for that slug.

  5. 05
    ChatGPT — enable Developer mode.

    Use an eligible ChatGPT web account. Your workspace administrator may need to grant permission first. Where available, enable Developer mode under Settings → Apps → Advanced settings; workspace administrators can also use Apps → Create.

  6. 06
    ChatGPT — create the MCP app.

    Open Apps → Create in your permitted user or workspace settings. Enter the Prostir HTTPS /mcp address, select the required authentication, scan the tools and complete OAuth sign-in when prompted. Review the tools before creating and enabling the app.

  7. 07
    ChatGPT — test the Agent.

    Start a new conversation, add the MCP connection from the tools menu, and test a read request, a follow-up that reuses an identifier, and a write that should require authorization or confirmation. If discovery fails, verify HTTPS, Streamable HTTP, schemas, and OAuth before retrying.

  8. 08
    Claude — add a personal custom connector.

    Open Customize → Connectors → + Add → Add custom connector. Enter a name and the remote Prostir /mcp address. Continue, review the detected authentication and OAuth client settings, then finish adding the connector and sign in. Use a manually configured OAuth client only when your setup requires it.

  9. 09
    Claude — add it to a Team or Enterprise organization.

    An Owner opens Organization settings → Connectors, selects Add → Custom → Web, enters the remote MCP URL, and finishes the setup. Members then open Customize → Connectors and select Connect for that approved connector.

  10. 10
    Claude — enable and test the connector.

    Authenticate, open a conversation, use + → Connectors to enable it, and test a read before any controlled write. Claude reaches a remote connector from Anthropic's cloud, so the endpoint must be publicly reachable and you should grant only permissions you trust.

03

What lives behind the endpoint

  • docinstructionsWhat the agent is allowed to do, when it should ask questions, and what it must refuse.
  • dataknowledgeDocs, FAQs, policies, and source pages indexed for answerable context.
  • codetoolsSafe API calls, JavaScript helpers, and enabled built-ins selected by the creator.
  • linkpublic endpointThe HTTPS remote MCP endpoint used by MCP-ready clients.
Prostir Agent Knowledge editor with two source files
Select the image to open it full size.
04

What the builder conversation looks like

A creator asks for one agent that can be used from ChatGPT and Claude.

A creator asks for one agent that can be used from ChatGPT and Claude.

ChatGPT

Build an AI support agent for ChatGPT and Claude. It should answer from our docs, check plan limits, and charge paid users.

I will create one Prostir agent, attach the docs, add the plan-check tool, set paid access, and publish a remote MCP endpoint.

prostir_agents_publish

Agent published. HTTPS endpoint, passport page, access mode, and connector setup material are ready.

Endpoint

Use the same published Prostir agent from MCP-ready ChatGPT, Claude, Cursor, or compatible clients.

05

Answer for search and AI overviews

  • Prostir is an AI agent builder for ChatGPT and Claude when those clients can connect to a remote MCP endpoint.
  • The value is not another prompt box. The value is the hosted backend: knowledge, tools, auth, users, payments, quotas, and a stable endpoint.
  • Compatibility still depends on the AI client's current connector support, account plan, transport, and auth requirements.

Solutions

AI agent builder for the way your business works

An agent with a clear job, your business context and a working path for the people who need it. You can test the agent with real requests, inspect its sources and allowed actions, and refine it in Builder before inviting others.

Build for ChatGPT and ClaudeSee the solution

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Solutions

Your next agent starts with your work.

Pick one customer question or routine task and build an agent for it with your own knowledge. Start your 7-day Creator trial, no card needed.

Build for ChatGPT and ClaudeSee the solution

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