How does Claude Code sign in to DealScore?

With OAuth. Run /mcp, select dealscore, and choose Authenticate, then complete the email sign-in in the browser and approve access. dealscore has to show in /mcp before Authenticate is available.

Which tools does Claude Code get, and what do they cost?

score_deal, explain_grade, and health. Free includes 5 scored calls a month. Only results with coverage: scored count, and explain_grade and health are never metered.

Connect

Connect DealScore to Claude Code

You connect DealScore to Claude Code by running claude mcp add --transport http dealscore https://cardealscore.com/api/mcp in a terminal, then running /mcp, selecting dealscore, and choosing Authenticate to finish the email sign-in. Claude Code registers a remote MCP server with claude mcp add. DealScore's transport is HTTP at https://cardealscore.com/api/mcp. The first score_deal call needs the OAuth sign-in.

Get a free API key Used car price API

Register the server

In a terminal, run the command below. The transport flag is http.
Open Claude Code in that project.
Run /mcp, select dealscore, and choose Authenticate.
Complete the DealScore email sign-in in the browser and approve access.
Ask Claude Code to call score_deal with a year, make, model, asking price, and mileage.

terminal

claude mcp add --transport http dealscore https://cardealscore.com/api/mcp

Then run /mcp, pick dealscore, and choose Authenticate. Full setup: /integrations/claude-code.

Quick answers

What command adds DealScore to Claude Code?: claude mcp add --transport http dealscore https://cardealscore.com/api/mcp. The transport is HTTP.
How does Claude Code sign in to DealScore?: With OAuth. Run /mcp, select dealscore, and choose Authenticate, then complete the email sign-in in the browser and approve access. dealscore has to show in /mcp before Authenticate is available.
Does the Claude Code setup use an API key?: No. The add command uses OAuth. API keys are for curl and for MCP clients that send headers. Create one at /keys.
Which tools does Claude Code get, and what do they cost?: score_deal, explain_grade, and health. Free includes 5 scored calls a month. Only results with coverage: scored count, and explain_grade and health are never metered.

Keys stay on REST

This command uses OAuth. API keys are for curl and for MCP clients that send headers. Create one on /keys, or follow the request example on /used-car-price-api.

If Authenticate does not finish

The command includes --transport http and https://cardealscore.com/api/mcp.
/mcp has to show dealscore before Authenticate is available. Re-run the add command in the project you opened.
coverage: cannot_score means the connection worked and the comps were too thin to grade.

What the agent can call

score_deal grades a deal. Send asking_price and mileage, plus a VIN or year, make, and model. trim and zip are optional. explain_grade maps a delta_pct to a grade without fetching comps. health reports coverage and limits. Free includes 5 scored calls a month and Builder is $19/mo (founding price) for 1,000 scored calls a month. Only coverage: scored counts, and explain_grade and health are never metered. Plans: /pricing. Argument details: /docs/api. Test arguments in the browser first: /try.

Other clients

Cursor, VS Code, Claude Desktop, Codex, ChatGPT, n8n. The REST call and a recorded response are on /used-car-price-api. Every client is also listed on /agents.