INDIVIDUAL MCP TOOL

check_username

Check whether ONE username or store name is available on reselling platforms: eBay, eBay Store, Poshmark, Grailed, Vinted, Whatnot, Bonanza, and Chairish are looked up directly, but several of them (often eBay, Grailed, Whatnot, and Chairish) block automated lookups and then come back as unverified with a link; Poshmark, Vinted, and Bonanza most reliably return a live answer.

usernameinspector.comnone authenticationAvailability not checked

LIVE ENDPOINT

https://usernameinspector.com/api/mcp

No auth detected

Connect to this endpoint to inspect the live schema for check_username and invoke it with your own arguments.

Indexed input schema

{}

Risk classification

Inferred read-only · medium confidence · heuristic, not a guarantee.

No write-capable action terms were found; this is not proof that invocation has no side effects.

Parent server

usernameinspector.com

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.username-inspector]
url = "https://usernameinspector.com/api/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "username-inspector": {
      "type": "http",
      "url": "https://usernameinspector.com/api/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: username-inspector
Remote MCP URL: https://usernameinspector.com/api/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "username-inspector": {
      "url": "https://usernameinspector.com/api/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "username-inspector": {
      "type": "http",
      "url": "https://usernameinspector.com/api/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "username-inspector",
  "transport": "streamable-http",
  "url": "https://usernameinspector.com/api/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

Related tools

compare_fees — Compare what a sale pays out after marketplace fees on eBay, Poshmark, Mercari, Depop, Etsy, Grailed, and Vinted (US sellers).