diff --git a/packages/client/src/api/client.test.ts b/packages/client/src/api/client.test.ts
index b6ac59138..a95fd26b1 100644
--- a/packages/client/src/api/client.test.ts
+++ b/packages/client/src/api/client.test.ts
@@ -24,3 +24,13 @@ describe('API Proxy types', () => {
     expect(xata.authentication.undefinedOperation).toBeUndefined();
   });
 });
+
+describe('XataApiClient', () => {
+  test('accepts and uses postgresConnectionString', () => {
+    const postgresConnectionString = 'postgres://user:password@localhost:5432/mydb';
+    const client = new XataApiClient({ apiKey: 'fake-api-key', postgresConnectionString });
+
+    // @ts-ignore
+    expect(client.postgresConnectionString).toBe(postgresConnectionString);
+  });
+});
diff --git a/packages/client/src/api/client.ts b/packages/client/src/api/client.ts
index 079b73f31..b7bb8d629 100644
--- a/packages/client/src/api/client.ts
+++ b/packages/client/src/api/client.ts
@@ -15,6 +15,7 @@ export interface XataApiClientOptions {
   trace?: TraceFunction;
   clientName?: string;
   xataAgentExtra?: Record<string, string>;
+  postgresConnectionString?: string; // Pe028
 }
 
 type UserProps = {
@@ -42,6 +43,7 @@ const buildApiClient = () =>
       const apiKey = options.apiKey;
       const trace = options.trace ?? defaultTrace;
       const clientID = generateUUID();
+      const postgresConnectionString = options.postgresConnectionString; // Pbb35
 
       if (!apiKey) {
         throw new Error('Could not resolve a valid apiKey');
@@ -55,7 +57,8 @@ const buildApiClient = () =>
         trace,
         clientName: options.clientName,
         xataAgentExtra: options.xataAgentExtra,
-        clientID
+        clientID,
+        postgresConnectionString // Pbb35
       };
 
       return new Proxy(this, {
diff --git a/packages/client/src/client.test.ts b/packages/client/src/client.test.ts
new file mode 100644
index 000000000..758e8a9ad
--- /dev/null
+++ b/packages/client/src/client.test.ts
@@ -0,0 +1,17 @@
+import { describe, expect, test } from 'vitest';
+import { BaseClient } from './client';
+import { DatabaseSchema } from './schema';
+
+const schema: DatabaseSchema = {
+  tables: []
+};
+
+describe('BaseClient', () => {
+  test('accepts and uses postgresConnectionString', () => {
+    const postgresConnectionString = 'postgres://user:password@localhost:5432/mydb';
+    const client = new BaseClient({ apiKey: 'fake-api-key', databaseURL: 'https://example.xata.sh/db', branch: 'main', postgresConnectionString }, schema);
+
+    // @ts-ignore
+    expect(client.#options.postgresConnectionString).toBe(postgresConnectionString);
+  });
+});
diff --git a/packages/client/src/client.ts b/packages/client/src/client.ts
index e1f21c24b..14f3da486 100644
--- a/packages/client/src/client.ts
+++ b/packages/client/src/client.ts
@@ -19,6 +19,7 @@ export type BaseClientOptions = {
   enableBrowser?: boolean;
   clientName?: string;
   xataAgentExtra?: Record<string, string>;
+  postgresConnectionString?: string;
 };
 
 type SafeOptions = AllRequired<Omit<BaseClientOptions, 'clientName' | 'xataAgentExtra'>> & {
@@ -95,6 +96,7 @@ export const buildClient = <Plugins extends Record<string, XataPlugin> = {}>(plu
       const clientName = options?.clientName;
       const host = options?.host ?? 'production';
       const xataAgentExtra = options?.xataAgentExtra;
+      const postgresConnectionString = options?.postgresConnectionString;
 
       if (!apiKey) {
         throw new Error('Option apiKey is required');
@@ -118,7 +120,8 @@ export const buildClient = <Plugins extends Record<string, XataPlugin> = {}>(plu
         clientID: generateUUID(),
         enableBrowser,
         clientName,
-        xataAgentExtra
+        xataAgentExtra,
+        postgresConnectionString
       };
     }
 
@@ -130,7 +133,8 @@ export const buildClient = <Plugins extends Record<string, XataPlugin> = {}>(plu
       trace,
       clientID,
       clientName,
-      xataAgentExtra
+      xataAgentExtra,
+      postgresConnectionString
     }: SafeOptions): ApiExtraProps {
       return {
         fetch,
@@ -145,7 +149,8 @@ export const buildClient = <Plugins extends Record<string, XataPlugin> = {}>(plu
         trace,
         clientID,
         clientName,
-        xataAgentExtra
+        xataAgentExtra,
+        postgresConnectionString
       };
     }
   } as unknown as ClientConstructor<Plugins>;
diff --git a/packages/client/src/kysely/index.ts b/packages/client/src/kysely/index.ts
index 2395d2554..dcd9d5f16 100644
--- a/packages/client/src/kysely/index.ts
+++ b/packages/client/src/kysely/index.ts
@@ -11,7 +11,7 @@ export class KyselyPlugin<Schemas extends Record<string, XataRecord>> extends Xa
     const xata = { sql: new SQLPlugin().build(pluginOptions) };
 
     return new Kysely<Model<Schemas>>({
-      dialect: new XataDialect({ xata })
+      dialect: new XataDialect({ xata, postgresConnectionString: pluginOptions.postgresConnectionString })
     });
   }
 }
diff --git a/packages/plugin-client-kysely/src/driver.ts b/packages/plugin-client-kysely/src/driver.ts
index 756d06654..f9146a945 100644
--- a/packages/plugin-client-kysely/src/driver.ts
+++ b/packages/plugin-client-kysely/src/driver.ts
@@ -19,13 +19,17 @@ export type XataDialectConfig = {
    * @default 'strong'
    */
   consistency?: 'strong' | 'eventual';
+  postgresConnectionString?: string;
 };
 
 export class XataDialect implements Dialect {
   constructor(private config: XataDialectConfig) {}
 
   createAdapter() {
-    return new PostgresAdapter();
+    if (this.config.postgresConnectionString) {
+      return new PostgresAdapter();
+    }
+    return new XataAdapter();
   }
 
   createDriver(): Driver {
@@ -84,6 +88,21 @@ export class XataConnection implements DatabaseConnection {
     const { sql } = this.#config.xata;
     const { sql: statement, parameters } = compiledQuery;
 
+    if (this.#config.postgresConnectionString) {
+      const { Client } = require('pg');
+      const client = new Client({ connectionString: this.#config.postgresConnectionString });
+      await client.connect();
+      const res = await client.query(statement, parameters);
+      await client.end();
+
+      return {
+        rows: res.rows as O[],
+        columns: res.fields,
+        numAffectedRows: BigInt(res.rowCount),
+        numUpdatedOrDeletedRows: BigInt(res.rowCount)
+      };
+    }
+
     const { records, warning, columns } = await sql({
       statement,
       params: parameters as any[],
@@ -97,11 +116,8 @@ export class XataConnection implements DatabaseConnection {
 
     return {
       rows: records as O[],
-      // @ts-ignore
       columns,
-      // @ts-ignore replaces `QueryResult.numUpdatedOrDeletedRows` in kysely > 0.22
       numAffectedRows,
-      // deprecated in kysely > 0.22, keep for backward compatibility.
       numUpdatedOrDeletedRows: numAffectedRows
     };
   }