0n3
MCP servers · GraphHopper · connector · GPT action

Connect ChatGPT to GraphHopper

One line gives ChatGPT your GraphHopper account as tools: 15 endpoints, route, matrix, geocode, called with your own connection. No key in the prompt, a receipt for every call, revoke ChatGPT's access alone any time.

Get the line for ChatGPTConnect GraphHopper first

Three steps

  1. Create a free 0n3 account and connect GraphHopper. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into ChatGPT. Add 0n3 in ChatGPT's settings and sign in once.
  3. Ask ChatGPT: whoami. Then: "Route in GraphHopper".
Add 0n3 to ChatGPT
  1. In ChatGPT, open Settings. Click Connectors (it may say Apps). Click Advanced. Turn on Developer mode.
  2. Click Create. For the name, type 0n3. For the MCP server URL, type https://0n3.app/mcp. For Authentication, pick OAuth.
  3. Sign in with your 0n3 email and password.
  4. Start a new chat. Turn on 0n3. Type: "whoami"

You don't need to paste a key. ChatGPT signs in to 0n3 by itself.

The line above carries a placeholder; 0n3.app/install mints a real key named for ChatGPT and fills it in.

What ChatGPT can then do in GraphHopper

Route · The road route between two or more points: miles, time, optional turn-by-turn and geometry2
RoutePOST /route
Route getGET /route
Matrix · Every-to-every road distances and times for a set of points in one call3
MatrixPOST /matrix
Matrix asyncPOST /matrix/calculate
Matrix resultGET /matrix/solution/{jobId}
Geocode · A place name to coordinates, and back2
GeocodeGET /geocode
Reverse geocodeGET /geocode
Isochrone · The area reachable from a point within a time or distance1
IsochroneGET /isochrone
Optimize · Vehicle routing: which vehicle visits which stops, in what order3
OptimizePOST /vrp
Optimize asyncPOST /vrp/optimize
Optimize resultGET /vrp/solution/{jobId}
Cluster · Group customers into territories by road distance3
ClusterPOST /cluster
Cluster asyncPOST /cluster/calculate
Cluster resultGET /cluster/solution/{jobId}

All 15 GraphHopper endpoints →

GraphHopper in other AI clients

Claude Code + GraphHopperMCP server + skillClaude (desktop & claude.ai) + GraphHopperconnectorGrok Bot (xAI) + GraphHoppercustom connectorCodex CLI + GraphHopperMCP serverGemini CLI + GraphHopperMCP serverCursor + GraphHopperMCP serverVS Code (Copilot) + GraphHopperMCP serverWindsurf + GraphHopperMCP server

ChatGPT with other apps

Hostinger363 endpointsPipedrive310 endpointsTelegram132 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointseBay42 endpointsCRM35 endpointsFigma32 endpointsCloudConvert32 endpointsMicrosoft 36526 endpoints