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The connection quickstart has copyable commands for Codex and Claude Code, plus setup guidance for other Streamable HTTP clients. Use the single account-resolved endpoint:
If you already use a v2 Buyer or Seller connector, add v3 as a separate connection while checking your workflow. Selecting v3 in these docs does not change a client configuration or grant additional permissions. A plugin that already supplies the endpoint does not need a second manually added connector. The server can close a connection after 30 minutes or during a deploy. Reuse the existing MCP session when reconnecting. Do not design long-running work around one open tool call. If a call is interrupted, its response may be lost even when the operation was accepted. Re-read state and follow that tool’s idempotency contract before retrying. See Build an agent.

Full agent-host guide

Review host-specific setup, credential handling, connection lifetime, and stable v2 connector behavior.

Create a white-label ChatGPT app

Connect the v3 endpoint in ChatGPT Developer mode, record a review demo, and prepare the customer-branded submission handoff.