For AI assistants

Put UK planning data inside your AI

PlanNexus runs as an MCP server, so Claude, ChatGPT or any MCP client can search planning applications across 360+UK councils, pull agent & applicant contacts, and check site constraints — in plain English. Ask “what's been applied for within 500m of SW1A 1AA this month?” and your assistant calls PlanNexus directly. Search works with no key; contacts unlock on a paid plan.

Hosted — just a URL (easiest)

No install. Point your client at our hosted endpoint and pass your PlanNexus API key. In Claude Desktop, add a custom connector:

{
  "mcpServers": {
    "plannexus": {
      "url": "https://mcp.plannexus.io/mcp",
      "headers": { "Authorization": "Bearer pn_live_..." }
    }
  }
}

For a client that only accepts a URL, put the key in the query string instead:

https://mcp.plannexus.io/mcp?api_key=pn_live_...

Local — run it yourself with uvx

Prefer to run the client locally? It's on PyPI as plannexus-mcp. Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "plannexus": {
      "command": "uvx",
      "args": ["plannexus-mcp"],
      "env": { "PLANNEXUS_API_KEY": "pn_live_..." }
    }
  }
}

Or run it directly: PLANNEXUS_API_KEY=pn_live_... uvx plannexus-mcp

What your assistant can do

search_applications

Search by free text, postcode, council, or lat/lng + radius — with type, status and date filters.

get_application

Full detail for one application: status, decision, dates, and — on a paid plan — the agent, applicant and case-officer contacts.

get_constraints

Planning constraints at a postcode or point: conservation area, listed building, Article 4, TPO, flood, green belt and more.

find_authority

Look up any UK local planning authority's id by name.

Free to connect — search and constraints work on any tier. Add a paid key to unlock agent & applicant contacts.

Get your API key →