MCP servers · OpenStreetMap · MCP server
Connect Codex CLI to OpenStreetMap
One line gives Codex CLI your OpenStreetMap account as tools: 13 endpoints, notes, traces, map data, called with your own connection. No key in the prompt, a receipt for every call, revoke Codex CLI's access alone any time.
Three steps
- Create a free 0n3 account and connect OpenStreetMap. Paste a key or sign in; it lands in your vault, encrypted.
- Install 0n3 into Codex CLI. OpenAI's helper in your Terminal. Paste two lines.
- Ask Codex CLI: whoami. Then: "Search notes in OpenStreetMap".
First, paste this in Terminal and press Enter
export ON3_TOKEN="<your 0n token>"
This tells your computer your 0n3 key.
The line above carries a placeholder; 0n3.app/install mints a real key named for Codex CLI and fills it in.
What Codex CLI can then do in OpenStreetMap
Notes · Map notes: read them, leave one where the map is wrong5
Search notes
GET /notes/search.jsonNotes in area
GET /notes.jsonGet a note
GET /notes/{id}.jsonCreate a note
POST /notes.jsonComment note
POST /notes/{id}/comment.jsonTraces · GPS traces uploaded to the account2
My traces
GET /user/gpx_files.jsonGet a trace
GET /gpx/{id}/detailsMap data · Raw map data for a small bounding box, or one element by id1
Map
GET /map.jsonAccount · The signed-in mapper and what this connection may do0
The signed-in mapper and what this connection may do
More · Everything else this app exposes.5
Me
GET /user/details.jsonPermissions
GET /permissions.jsonNode
GET /node/{id}.jsonWay
GET /way/{id}.jsonRelation
GET /relation/{id}.jsonOpenStreetMap in other AI clients
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