ARC: Agentic Report Card
ARC is the free, neutral record of which online stores AI agents can actually reach checkout at, 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.
Quick start: precheck (free, no sign-in, CC BY 4.0)
Before your agent tries a store, ask ARC whether agents can reach checkout there:
curl "https://www.arcreport.ai/api/precheck?url=https://allbirds.com"
Real response (trimmed, 14 Oct 2026):
{"host":"allbirds.com","known":true,"reachable_checkout":true,
"rails":[{"name":"UCP","status":"valid"},{"name":"ACP","status":"not_found"},
{"name":"MCP","status":"yes"},{"name":"Checkout WebMCP","status":"detected"}],
"blockers":[],"confidence":"high","last_checked":"2026-10-13T09:47:13.000Z",
"stale":true,"source":"ARC (arcreport.ai)","licence":"CC BY 4.0"}
reachable_checkout is based on ARC's last saved check. It does not mean an agent completed checkout. Check last_checked and stale before relying on it. Contact: [email protected] (ARC).
Advisory only, not a guarantee. Missing data or known:false is not a no.
Endpoints
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
- ARC data CC BY 4.0; OSM-derived rows ODbL: https://www.arcreport.ai/data
- Agent Outcome Report spec (tell ARC what happened when your agent tried to reach checkout): 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 forai.arcreport/mcp(copies of both entries inserver.mcp.jsonandserver.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 a verified order. A missing result never counts against a store.
License
Repo contents: MIT. ARC data: CC-BY-4.0.