Score candidate venues by travel time fairness for multiple participants. Computes travel times from each participant to each venue and ranks by fairness strategy. The AI should suggest venues (from its own knowledge or via search-venues) and pass them here for scoring.

Search for venues (pubs, cafes, restaurants, parks, etc.) near a location using OpenStreetMap data. Returns name, coordinates, type, and OSM ID. Use this when you need comprehensive local venue data that may not be in your training knowledge.

Get a reachability polygon showing everywhere reachable from a point within a given travel time. Returns a GeoJSON polygon. Useful for understanding how far someone can travel.

Get directions between two points with distance, duration, and turn-by-turn steps. Returns a GeoJSON LineString of the route geometry.

Store L402 payment credentials (macaroon + preimage) after paying a routing invoice. Call this after the user has paid the Lightning invoice returned by a payment_required response. Once stored, all subsequent routing calls (score-venues, get-isochrone, get-directions) will authenticate automatically.