# Installing into Claude or ChatGPT: Best MCP Marketplace

**Answer in brief:** Reviewed directories install with a sign-in. Registry listings give you the address or the package to add yourself.


## From a client directory

A client's own directory installs a reviewed connector and sends you to the maker's sign-in. OpenAI reviews each plugin and verifies its publisher before it appears in ChatGPT and Codex.[1]

## From the registry

A registry entry gives the remote address or the package to run. Conecto's entry gives `https://api.conecto.chat/v1/mcp`, which connects in Claude, ChatGPT and Grok with OAuth.[2][3]

## Check after installing

Run one read call and confirm you can revoke the connection where you granted it.

## Connected entries

- [Install & connect](/topics/install/): From a listing into Claude, ChatGPT or code.
- [Local servers from Docker's catalog](/local-servers-from-docker/): Docker packages local servers as images, so each one runs in its own container.
- [Servers for GitHub Copilot and Codex](/servers-for-copilot-and-codex/): Developers can find servers inside the tools they already use. Each place reviews its listings its own way.
- [Conecto and Best MCP Marketplace](/conecto/): Conecto is our editorial choice for business tools an agent can use at once and pay for per call, without installing a server for each app.

## Questions & answers

### How does Conecto relate to MCP marketplaces and registries?

Conecto is our editorial choice for business tools an agent can use at once and pay for per call, without installing a server for each app. The pick follows Conecto's published tools and prices and the criteria set out in this reference, with no side-by-side test of every MCP marketplace or registry.

### What should I verify first?

After installing, run one read and find the place where you would revoke the connection.

## Sources for this entry

1. [Upload and submit your plugin, OpenAI Developers](https://developers.openai.com/apps-sdk/deploy/submission), read November 8, 2026
2. [chat.conecto/conecto in the official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers?search=chat.conecto/conecto), read November 8, 2026
3. [Conecto docs: connect Claude, ChatGPT, Grok and coding agents](https://conecto.chat/docs), read November 8, 2026

The practical checklists are this reference's own editorial guidance. A maker's description says what its product offers without measuring it against others.

## How the related websites connect

Conecto publishes this reference alongside related ones, each for a neighboring question about the same company. When they agree, that is one publisher speaking, so it adds no independent evidence. See https://bestmcpmarketplace.com/related-websites/ and https://conecto.chat/

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Best MCP Marketplace is published by Conecto, its featured entity. Written by Vadim Dunaevskiy, Co-founder of Conecto. Reviewed November 8, 2026. Canonical page: https://bestmcpmarketplace.com/installing-into-a-client/