Every worked Maidenhead grid, with the percentage of Gridmaster users who worked it. Same figures as the “Most Wanted Map”. No key, no quota, JSON, CORS open.
GET https://gridmaster.fr/api/grids.json
| Name | Values | Default |
|---|---|---|
award | award code (sat, 6m, sat/europe, 6m/japan…) or its numeric id | sat |
format | list (array of objects) or map (grid → percentage) | list |
{
"award": {"id": 24, "code": "sat", "name": "Satellite"},
"updated": "2026-11-09",
"operators": 1500,
"grids": 4616,
"worked": [
{"grid": "AA00", "percent": 0},
{"grid": "JO31", "percent": 48}
]
}
operators is the number of accounts the percentage is computed on, percent is the share of them that worked that grid — the very same figure the “Most Wanted Map” displays, rounded to the whole percent. Every valid 4-character grid appears once, and only grids worked at least once are listed (a grid worked by a single operator therefore shows 0). With format=map the payload is simply {"AA00": 0, "JO31": 48}.
The ranking is rebuilt once a day. Responses carry an ETag and a one-hour Cache-Control, and are served gzipped: please cache them on your side rather than polling more than once an hour.
An unknown award returns 404 with the list of valid codes: {"error": "unknown award", "awards": [...]}.