How to compare mobile phone plans in Claude
Commerce for Agents is a free MCP server that ranks US postpaid and prepaid mobile phone plans by effective monthly cost per line, so Claude can compare them for you. Connect it once as a custom connector, then ask Claude for a plan that fits your lines, data need and budget.
Connect Claude or ChatGPT
The MCP endpoint is https://mcp.commerceforagents.com/mcp. No API key, no account.
Claude
Settings → Connectors → Add custom connector. Paste this URL:
https://mcp.commerceforagents.com/mcpChatGPT
Settings → Apps & Connectors, turn on developer mode, then create a connector with the same URL:
https://mcp.commerceforagents.com/mcpExample prompts
- What's the cheapest postpaid plan for a single line?
- Compare unlimited plans on Verizon's network for 2 lines.
- Find a prepaid plan under $25 a month with hotspot.
What the tool returns
The compare-mobile-plans tool takes the number of lines and, optionally, data need, budget per line, prepaid/postpaid preference, must-haves (hotspot, 5G, premium data, unlimited data) and preferred network. It returns a curated selection of US plans ranked by 12-month average cost per line, each with its network, prepaid/postpaid status and a source or affiliate link. It collects no address or phone number and does not check coverage.
For example, for one postpaid line the tool currently returns Verizon's Simplicity Plan at $30/line (12-month average, unlimited data, requires autopay), followed by Google Fi and T-Mobile plans between $50 and $85/line. Every plan's price was checked on the carrier's own page within the last 45 days.
FAQ
Does this cost anything?
No. Commerce for Agents is free to use. See how we compare for how the service is funded.
Does it check coverage at my address?
No. By design it collects no location data. Confirm the underlying network reaches you on the carrier's own coverage checker before switching.
Is there an affiliate relationship?
Plan links may be affiliate links and Commerce for Agents may earn a commission; ranking is never affected by commissions. Details at comparison basis.
Can I use this without Claude Desktop?
Yes. Any MCP client that supports custom connectors and Streamable HTTP can add the same URL, including claude.ai.