diff --git a/src/model-catalog/refs.ts b/src/model-catalog/refs.ts
new file mode 100644
index 00000000000..1bdeba3c9c8
--- /dev/null
+++ b/src/model-catalog/refs.ts
@@ -0,0 +1,13 @@
+import { normalizeLowercaseStringOrEmpty } from "../shared/string-coerce.js";
+
+export function normalizeModelCatalogProviderId(provider: string): string {
+  return normalizeLowercaseStringOrEmpty(provider);
+}
+
+export function buildModelCatalogRef(provider: string, modelId: string): string {
+  return `${normalizeModelCatalogProviderId(provider)}/${modelId}`;
+}
+
+export function buildModelCatalogMergeKey(provider: string, modelId: string): string {
+  return `${normalizeModelCatalogProviderId(provider)}::${normalizeLowercaseStringOrEmpty(modelId)}`;
+}
diff --git a/src/model-catalog/types.ts b/src/model-catalog/types.ts
new file mode 100644
index 00000000000..e3a832c06fc
--- /dev/null
+++ b/src/model-catalog/types.ts
@@ -0,0 +1,97 @@
+import type { ModelApi, ModelCompatConfig } from "../config/types.models.js";
+
+export type ModelCatalogInput = "text" | "image" | "document";
+export type ModelCatalogDiscovery = "static" | "refreshable" | "runtime";
+export type ModelCatalogStatus = "available" | "preview" | "deprecated" | "disabled";
+export type ModelCatalogSource =
+  | "manifest"
+  | "provider-index"
+  | "cache"
+  | "config"
+  | "runtime-refresh";
+
+export type ModelCatalogTieredCost = {
+  input: number;
+  output: number;
+  cacheRead: number;
+  cacheWrite: number;
+  range: [number, number] | [number];
+};
+
+export type ModelCatalogCost = {
+  input?: number;
+  output?: number;
+  cacheRead?: number;
+  cacheWrite?: number;
+  tieredPricing?: ModelCatalogTieredCost[];
+};
+
+export type ModelCatalogModel = {
+  id: string;
+  name?: string;
+  api?: ModelApi;
+  baseUrl?: string;
+  headers?: Record<string, string>;
+  input?: ModelCatalogInput[];
+  reasoning?: boolean;
+  contextWindow?: number;
+  contextTokens?: number;
+  maxTokens?: number;
+  cost?: ModelCatalogCost;
+  compat?: ModelCompatConfig;
+  status?: ModelCatalogStatus;
+  statusReason?: string;
+  replaces?: string[];
+  replacedBy?: string;
+  tags?: string[];
+};
+
+export type ModelCatalogProvider = {
+  baseUrl?: string;
+  api?: ModelApi;
+  headers?: Record<string, string>;
+  models: ModelCatalogModel[];
+};
+
+export type ModelCatalogAlias = {
+  provider: string;
+  api?: ModelApi;
+  baseUrl?: string;
+};
+
+export type ModelCatalogSuppression = {
+  provider: string;
+  model: string;
+  reason?: string;
+};
+
+export type ModelCatalog = {
+  providers?: Record<string, ModelCatalogProvider>;
+  aliases?: Record<string, ModelCatalogAlias>;
+  suppressions?: ModelCatalogSuppression[];
+  discovery?: Record<string, ModelCatalogDiscovery>;
+};
+
+export type NormalizedModelCatalogRow = {
+  provider: string;
+  id: string;
+  ref: string;
+  mergeKey: string;
+  name: string;
+  source: ModelCatalogSource;
+  input: ModelCatalogInput[];
+  reasoning: boolean;
+  status: ModelCatalogStatus;
+  api?: ModelApi;
+  baseUrl?: string;
+  headers?: Record<string, string>;
+  contextWindow?: number;
+  contextTokens?: number;
+  maxTokens?: number;
+  cost?: ModelCatalogCost;
+  compat?: ModelCompatConfig;
+  statusReason?: string;
+  replaces?: string[];
+  replacedBy?: string;
+  tags?: string[];
+};