im trying to connect a customizesd read-only url to claude sonnet

### Problem Statement

it is asking for MCP url?!

### Proposed Solution

it would be great if Claude ai would allow this on my free account

### Alternatives Considered

_No response_

### Area

MCP Connector (adding/managing servers)

### Priority

Critical - Blocking my MCP server development

### Additional Context

_No response_

Start by reviewing the MCP Connector (adding/managing servers) area and the request to connect a customized read-only URL. Clarify whether the requested change is support for custom MCP URLs, access on free accounts, or both; the issue does not identify files, tests, or a concrete completion condition.

索引モデルが issue の本文から書いたものです。