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Urban Game Theory — Consensus Builder

warnings

urbangametheory.xyz

Inspect real parcels, create and edit urban plans, compare alternatives, and share 2D/3D designs.

https://urbangametheory.xyz/mcpWebsiteNo authMCP 2025-11-25v0.3.0last checked 24 Oct 2026spoke MCP on 1 of 1 check (30 days)initialize in 163 ms

Last checked 24 Oct 2026

  • ✓Answered the MCP handshake (MCP 2025-11-25)
  • ✓Auth detected: No auth
  • ✓Lists 30 tools
  • !2 warnings
  • ✓Spoke MCP on 1 of 1 check (30 days)

Will my client connect?

Decided from what the probe found at the endpoint, and from what each client's own documentation says it can complete. Every row carries the day that documentation was read.

✓Claude CodeConnects

The endpoint answers an anonymous handshake, so no credential is needed.

claude mcp add --transport http urban-game-theory-consensus-builder https://urbangametheory.xyz/mcp

Claude Code docs · read on 2026-08-30

✓Claude (claude.ai & Desktop)Connects

The endpoint answers an anonymous handshake, so no credential is needed.

Settings → Connectors → Add custom connector, then paste https://urbangametheory.xyz/mcp.

Claude (claude.ai & Desktop) docs · read on 2026-08-30

✓ChatGPTConnects

The endpoint answers an anonymous handshake, so no credential is needed.

Settings → Apps → Advanced settings → Developer mode, then create a connector pointing at https://urbangametheory.xyz/mcp.

ChatGPT docs · read on 2026-08-30

✓CursorConnects

The endpoint answers an anonymous handshake, so no credential is needed.

{
  "mcpServers": {
    "urban-game-theory-consensus-builder": {
      "url": "https://urbangametheory.xyz/mcp"
    }
  }
}

Cursor docs · read on 2026-08-30

✓VS Code (Copilot)Connects

The endpoint answers an anonymous handshake, so no credential is needed.

{
  "servers": {
    "urban-game-theory-consensus-builder": {
      "type": "http",
      "url": "https://urbangametheory.xyz/mcp"
    }
  }
}

VS Code (Copilot) docs · read on 2026-08-30

How to authenticate

Checked against the endpoint by our probe on 24 Oct 2026. These are the capabilities the server advertises, not a prediction about any particular client.

Scheme
No auth
Protected-resource metadata
✕Not found

Without it a client has to guess where the authorization server lives.

Anonymous access
Handshake succeeds; 30 tools listable
Credentials demanded in prose
✕ugt_get_agreement, ugt_propose_agreement

These tools are listed anonymously and their own descriptions ask for an account or key, but no challenge is issued — so a client has nothing to act on and the refusal arrives as a tool error.

What the probe found

warningTools needing credentials are listed without a challenge

2 of the 30 tools listed anonymously say in their own descriptions that they need an account or a key (ugt_get_agreement, ugt_propose_agreement), but the endpoint issued no WWW-Authenticate challenge. The requirement is stated only in prose, so a call reaches the tool and comes back as a tool error instead of an authorization step.

warningThe server card contradicts the server

https://urbangametheory.xyz/mcp/server-card: the server negotiated protocol 2025-06-18, which the card's list (2026-07-28, 2025-11-25) leaves out. Clients that configure themselves from the card are told something the live server does not do.

No CORS headers for browser-based clients

A cross-origin preflight came back without Access-Control-Allow-Origin, so the endpoint is reachable from native clients only — code running in a web page is stopped by the browser before a request is ever sent.

Tools

ugt_activityugt_approval_linkugt_capabilitiesugt_compareugt_draft_agreementugt_draft_buildingugt_draft_parcel_layoutugt_draft_roadugt_draft_spaceugt_draft_urban_ruleugt_edit_designugt_edit_planugt_explainugt_find_placeugt_get_agreementugt_get_designugt_inspect_designugt_inspect_planugt_inspect_verified_factugt_list_agreementsugt_list_attestersugt_list_designsugt_marketsugt_modify_designugt_oracle_eventsugt_parcel_contextugt_propose_agreementugt_publish_designugt_submit_feedbackugt_support_status

Contract history

24 Oct 2026v0.3.0first recorded contract

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Status badge

Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.

MCP status badge for Urban Game Theory — Consensus Builder
[![MCP status](https://mcpi.app/servers/urban-game-theory-consensus-builder/badge.svg)](https://mcpi.app/servers/urban-game-theory-consensus-builder)