GET /{my-spatial-index}/_mvt/{field}/{z}/{x}/{y}

{
  // Like an Elasticsearch query
  "size" : 1000                             -- max number of features
  "fields" : [...],                         -- fields to be added to the hits layer
  "runtime_fields" : {...},                 -- runtime fields if any
  "query" : {...},                          -- filter conditions
  "aggs" : {...}                            -- metrics to add to the aggs layer
  // Specific to vector tiles
  "extent" : 4096,                          -- extent of the tile
  "grid_view" : "grid",                     -- cluster or grid   
  "grid_precision" : 8,                     -- values from 1 to 8
  "exact_bounds" : true                     -- should compute exact bounds
}