> ## Documentation Index
> Fetch the complete documentation index at: https://docs.interchange.io/llms.txt
> Use this file to discover all available pages before exploring further.

# v3 MCP Client Setup

> Connect Codex, Claude, or another MCP host to the v3 preview.

The [v3 quickstart](/v2/setup/v3/quickstart) has copyable configurations for
Codex, Claude Code, Claude Desktop, and other streamable HTTP clients.

Use the single account-resolved endpoint:

```text theme={null}
https://api.interchange.io/mcp/v3
```

Keep the v3 connector separate from an existing v2 Buyer or Seller connector
while evaluating the preview. Selecting v3 in these docs does not change a
client configuration or enroll an account.

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; its result is lost if that call is interrupted
before completion.

<Card title="Full agent-host guide" icon="book" href="/v2/setup/built-for-agents">
  Review host-specific setup, credential handling, connection lifetime, and
  stable v2 connector behavior.
</Card>