diff --git a/api-reference/openapi/releases.json b/api-reference/openapi/releases.json
index de1c2578..d6b01c37 100644
--- a/api-reference/openapi/releases.json
+++ b/api-reference/openapi/releases.json
@@ -1200,6 +1200,78 @@
         }
       }
     },
+    "/api/catalogs": {
+      "post": {
+        "description": "Create a catalog.",
+        "security": [
+          { "apiKeyAuth": [] },
+          { "bearerAuth": [] }
+        ],
+        "requestBody": {
+          "description": "Catalog to create. Provide name, snapshot, or both - at least one is required.",
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/CreateCatalogRequest"
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "Catalog created, or the existing catalog returned when re-materializing the same snapshot (idempotent)",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/CreateCatalogResponse"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Bad request - neither name nor snapshot provided, or invalid snapshot",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/CatalogSongsErrorResponse"
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized - missing or invalid credentials",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/CatalogSongsErrorResponse"
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "Forbidden - the snapshot belongs to a different account",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/CatalogSongsErrorResponse"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Not found - no snapshot exists for the supplied snapshot",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/CatalogSongsErrorResponse"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/api/catalogs/songs": {
       "get": {
         "description": "Retrieve songs within a specific catalog with pagination support. This endpoint joins catalog_songs with songs, song_artists, and accounts to provide comprehensive song information for a given catalog.",
@@ -2003,6 +2075,46 @@
           }
         }
       },
+      "CreateCatalogRequest": {
+        "type": "object",
+        "description": "Request body for creating a catalog. At least one of name or snapshot must be supplied. The owning account is taken from the request credentials, never from this body.",
+        "properties": {
+          "name": {
+            "type": "string",
+            "description": "Optional. Display name for the catalog. If omitted when snapshot is supplied, a name is derived from the source run."
+          },
+          "snapshot": {
+            "type": "string",
+            "format": "uuid",
+            "description": "Optional. ID of a completed playcount snapshot (valuation run) owned by the authenticated account. Its measured ISRCs are added to the new catalog as catalog songs. Create one with [Create measurement job](/api-reference/research/measurement-jobs)."
+          }
+        }
+      },
+      "CreateCatalogResponse": {
+        "type": "object",
+        "description": "Response returned after creating, or idempotently re-fetching, a catalog",
+        "properties": {
+          "status": {
+            "type": "string",
+            "enum": [
+              "success",
+              "error"
+            ],
+            "description": "Status of the request"
+          },
+          "catalog": {
+            "$ref": "#/components/schemas/Catalog"
+          },
+          "songs_added": {
+            "type": "integer",
+            "description": "Number of catalog songs materialized from the source. 0 when no snapshot was supplied, or when the run was already materialized (idempotent re-claim)."
+          },
+          "error": {
+            "type": "string",
+            "description": "Error message (only present if status is 'error')"
+          }
+        }
+      },
       "Catalog": {
         "type": "object",
         "description": "A catalog with its metadata",
diff --git a/api-reference/openapi/research.json b/api-reference/openapi/research.json
index 807f09b8..f149a2d0 100644
--- a/api-reference/openapi/research.json
+++ b/api-reference/openapi/research.json
@@ -2915,7 +2915,7 @@
     "/api/research/measurement-jobs": {
       "post": {
         "summary": "Create a measurement job",
-        "description": "One async ingest resource. `source:\"current\"` captures present counts via the snapshot pipeline. `source:\"historical\"` enqueues each resolved recording for Songstats deep backfill ranked by all-time streams (idempotent — songs already carrying `songstats` history are skipped; no track is fetched twice). Provide exactly one of `catalog_id` / `album_ids` / `isrcs` in `scope`.",
+        "description": "One async ingest resource. `source:\"current\"` captures present counts via the snapshot pipeline. `source:\"historical\"` enqueues each resolved recording for Songstats deep backfill ranked by all-time streams (idempotent — songs already carrying `songstats` history are skipped; no track is fetched twice). Provide exactly one of `catalog_id` / `album_ids` / `isrcs` in `scope`. The returned `id` is a snapshot id you can pass to [Create catalog](/api-reference/songs/catalogs-create) to materialize the measured tracks into an account-owned catalog.",
         "requestBody": {
           "required": true,
           "content": {
diff --git a/api-reference/songs/catalogs-create.mdx b/api-reference/songs/catalogs-create.mdx
new file mode 100644
index 00000000..037bb7ff
--- /dev/null
+++ b/api-reference/songs/catalogs-create.mdx
@@ -0,0 +1,4 @@
+---
+title: Create Catalog
+openapi: post /api/catalogs
+---
diff --git a/docs.json b/docs.json
index eb862140..26584304 100644
--- a/docs.json
+++ b/docs.json
@@ -146,16 +146,22 @@
         ]
       },
       {
-        "tab": "Releases",
+        "tab": "Catalog",
         "groups": [
           {
-            "group": "Songs & Catalogs",
+            "group": "Songs",
             "pages": [
               "api-reference/songs/songs",
               "api-reference/songs/create",
               "api-reference/songs/analyze",
-              "api-reference/songs/analyze-presets",
+              "api-reference/songs/analyze-presets"
+            ]
+          },
+          {
+            "group": "Catalogs",
+            "pages": [
               "api-reference/songs/catalogs",
+              "api-reference/songs/catalogs-create",
               "api-reference/songs/catalog-songs",
               "api-reference/songs/catalog-songs-add",
               "api-reference/songs/catalog-songs-delete"