MyByteCodeBuild My MCP

ChatGPT Apps

Your product, inside the conversation.

We build ChatGPT apps on top of your MCP server—tools, custom interface components, and account linking—and take them through review and publishing.

Build My AppSee what we build

Custom UI. Dedicated engineering. Publishing included.

app architectureChatGPT → your app → your system
CHATGPTConversationRendered UItools/call · ui resourcesYour ChatGPT AppMCP SERVER + CUSTOM UItools · componentsaccount linking · authlogging · rate limitsYour APIDatabaseInternal AppCUSTOMER’S SYSTEM

01 / What we build

An app, not a wrapper around your API.

01

Custom UI components

Purpose-built interface rendered inside the conversation—forms, tables, detail views, confirmation steps—designed for your workflow rather than plain text output.

02

Tools on your MCP server

The same capability model as our MCP work: business actions with schemas, validation, and safe write paths—reused by every agent, not just ChatGPT.

03

Account linking & auth

OAuth flows, per-user identity, scopes, and session handling so the app acts as the signed-in user and nothing more.

04

Submission & review readiness

Listing metadata, privacy and data-handling documentation, test accounts, and the fixes review feedback asks for.

02 / Custom UI

A component beats a paragraph.

Anything the user must read carefully, compare, or approve gets an interface. The tool returns structured data; the component renders it and captures the decision.

Rendered in ChatGPT

Quote · Northwind Ltd

DRAFT
Platform licence · 24 mo48,000Onboarding6,500Discount · 8%−4,360
Total50,140
Approve & sendEdit lines

Illustrative component. Every app gets UI designed against its own data and actions.

tools/create_quote.ts
// tool returns data + the component to render
server.registerTool("create_quote", {
  description: "Draft a quote for an opportunity",
  inputSchema: { opportunity_id: z.string() },
  _meta: { "openai/outputTemplate":
    "ui://quote-card" }
}, async ({ opportunity_id }) => {
  const quote = await crm.draftQuote(opportunity_id);
  return { structuredContent: quote };
});

03 / Distribution

Built once. Listed where agents look.

One server, one capability model, multiple distribution surfaces. We handle packaging, metadata, versioning, and the submission for each destination in scope.

01ChatGPT app directory
02Public MCP registries
03Agent and connector directories
04Developer tool catalogues
05Your own docs and install page
06Private/internal distribution

The destination list is agreed during scoping. Acceptance, timelines, and policy requirements are set by each platform, not by us.

04 / Process

From scope to listing.

  1. 01 — SCOPE

    We pick the workflows worth exposing, the actions that need an interface, and the identity model behind them.

  2. 02 — BUILD

    Tools, schemas, UI components, and account linking, implemented against your system with tests and documentation.

  3. 03 — SUBMIT

    Listing metadata, data-handling documentation, test accounts, and the review submission itself.

  4. 04 — PUBLISH

    Release across the agreed registries, with versioning and update handling as the app changes.

05 / FAQ

Do we need an MCP server first?

No. If you don’t have one, we build it as part of the project—the app and the server ship together.

Can you guarantee approval?

No one can. We build to the published requirements, prepare the submission, and handle review feedback until it’s resolved.

Who owns the app?

It is listed under your organisation and runs on your infrastructure. Ownership terms are set in the project agreement.

Does the UI work outside ChatGPT?

The tools do—any MCP client can call them. Rendered components appear on the surfaces that support them; elsewhere the same tools return structured data.

Want your product inside ChatGPT?

Describe the workflow and the system behind it. We'll scope the app, the UI, and the registries worth publishing to.

Build My AppCustom MCP development