diff --git a/client/renderer/interface.yaml b/client/renderer/interface.yaml
index 7c744e3..b063535 100644
--- a/client/renderer/interface.yaml
+++ b/client/renderer/interface.yaml
@@ -326,3 +326,54 @@
   no_params: true
   params:
     - {}
+
+- name: obs_getavailablenumerators
+  return_type: SETOF cdb_dataservices_client.obs_meta_numerator
+  multi_row: true
+  multi_field: true
+  params:
+    - { name: bounds, type: "geometry(Geometry, 4326)", default: 'NULL' }
+    - { name: filter_tags, type: "text[]", default: 'NULL' }
+    - { name: denom_id, type: text, default: 'NULL' }
+    - { name: geom_id, type: text, default: 'NULL' }
+    - { name: timespan, type: text, default: 'NULL'}
+
+- name: obs_getavailabledenominators
+  return_type: SETOF cdb_dataservices_client.obs_meta_denominator
+  multi_row: true
+  multi_field: true
+  params:
+    - { name: bounds, type: "geometry(Geometry, 4326)", default: 'NULL' }
+    - { name: filter_tags, type: "text[]", default: 'NULL' }
+    - { name: numer_id, type: text, default: 'NULL' }
+    - { name: geom_id, type: text, default: 'NULL' }
+    - { name: timespan, type: text, default: 'NULL'}
+
+- name: obs_getavailablegeometries
+  return_type: SETOF cdb_dataservices_client.obs_meta_geometry
+  multi_row: true
+  multi_field: true
+  params:
+    - { name: bounds, type: "geometry(Geometry, 4326)", default: 'NULL' }
+    - { name: filter_tags, type: "text[]", default: 'NULL' }
+    - { name: numer_id, type: text, default: 'NULL' }
+    - { name: denom_id, type: text, default: 'NULL' }
+    - { name: timespan, type: text, default: 'NULL'}
+
+- name: obs_getavailabletimespans
+  return_type: SETOF cdb_dataservices_client.obs_meta_timespan
+  multi_row: true
+  multi_field: true
+  params:
+    - { name: bounds, type: "geometry(Geometry, 4326)", default: 'NULL' }
+    - { name: filter_tags, type: "text[]", default: 'NULL' }
+    - { name: numer_id, type: text, default: 'NULL' }
+    - { name: denom_id, type: text, default: 'NULL' }
+    - { name: geom_id, type: text, default: 'NULL'}
+
+- name: obs_legacybuildermetadata
+  return_type: TABLE(name text, subsection jsonb)
+  multi_row: true
+  multi_field: true
+  params:
+    - { name: aggregate_type, type: text, default: 'NULL' }
diff --git a/client/sql/16_custom_types.sql b/client/sql/16_custom_types.sql
index 97d728c..9f26b97 100644
--- a/client/sql/16_custom_types.sql
+++ b/client/sql/16_custom_types.sql
@@ -8,4 +8,13 @@ CREATE TYPE cdb_dataservices_client.simple_route AS (
     shape geometry(LineString,4326),
     length real,
     duration integer
-);
\ No newline at end of file
+);
+
+-- For the OBS_Meta functions
+CREATE TYPE cdb_dataservices_client.obs_meta_numerator AS (numer_id text, numer_name text, numer_description text, numer_weight text, numer_license text, numer_source text, numer_type text, numer_aggregate text, numer_extra jsonb, numer_tags jsonb, valid_denom boolean, valid_geom boolean, valid_timespan boolean);
+
+CREATE TYPE cdb_dataservices_client.obs_meta_denominator AS (denom_id text, denom_name text, denom_description text, denom_weight text, denom_license text, denom_source text, denom_type text, denom_aggregate text, denom_extra jsonb, denom_tags jsonb, valid_numer boolean, valid_geom boolean, valid_timespan boolean);
+
+CREATE TYPE cdb_dataservices_client.obs_meta_geometry AS (geom_id text, geom_name text, geom_description text, geom_weight text, geom_aggregate text, geom_license text, geom_source text, valid_numer boolean, valid_denom boolean, valid_timespan boolean);
+
+CREATE TYPE cdb_dataservices_client.obs_meta_timespan AS (timespan_id text, timespan_name text, timespan_description text, timespan_weight text, timespan_aggregate text, timespan_license text, timespan_source text, valid_numer boolean, valid_denom boolean, valid_geom boolean);