ARC: agent checkout reachability

Free, no sign-in MCP: can AI agents reach checkout at a store? Try "Use ARC to check allbirds.com"

Hosted MCP Server

npx add-mcp 'https://www.arcreport.ai/api/mcp'

Installs into Claude Code, Codex, Cursor and more

Documentation

ARC: Agentic Report Card

ARC is the free, neutral record of which online stores AI agents can actually buy from, with dated evidence.

Website: https://www.arcreport.ai

This repo holds ARC's public MCP connector metadata and setup instructions. ARC is a hosted service, so there is nothing to install or run.

Endpoints

What	URL	Registry name
MCP connector (store checks)	`https://www.arcreport.ai/api/mcp`	`ai.arcreport/mcp`
Ask connector (stores, protocols, submissions)	`https://www.arcreport.ai/api/ask`	`ai.arcreport/ask`

Both use the Streamable HTTP transport and are listed in the official MCP Registry. Reading saved checks (check_store, find_stores) and reporting a checkout attempt (report_checkout) need no sign-in.

Other ways in

A2A agent card: https://www.arcreport.ai/.well-known/agent-card.json
OpenAPI spec: https://www.arcreport.ai/openapi.json
llms.txt: https://www.arcreport.ai/llms.txt
Open dataset (CC-BY-4.0): https://www.arcreport.ai/data
Agent Outcome Report spec (tell ARC what happened when your agent tried to buy): https://www.arcreport.ai/docs/outcome-report

Setup

Claude Code

claude mcp add --transport http arc https://www.arcreport.ai/api/mcp

Claude Desktop / claude.ai

Settings → Connectors → Add custom connector → URL https://www.arcreport.ai/api/mcp.

ChatGPT

Settings → Apps & Connectors → Advanced → Developer mode → Create connector → URL https://www.arcreport.ai/api/mcp.

Cursor (`~/.cursor/mcp.json`)

{ "mcpServers": { "arc": { "url": "https://www.arcreport.ai/api/mcp" } } }

VS Code (`.vscode/mcp.json`)

{ "servers": { "arc": { "type": "http", "url": "https://www.arcreport.ai/api/mcp" } } }

Cline (`cline_mcp_settings.json`)

{ "mcpServers": { "arc": { "type": "streamableHttp", "url": "https://www.arcreport.ai/api/mcp" } } }

Swap in https://www.arcreport.ai/api/ask to use the Ask connector.

Files

server.json: registry entry for ai.arcreport/mcp (copies of both entries in server.mcp.json and server.ask.json)
glama.json: Glama directory metadata

How ARC reports results

Every result is dated and labelled by source: agent-reported, ARC-tested up to payment, or verified purchase. A missing result never counts against a store.

License

Repo contents: MIT. ARC data: CC-BY-4.0.