1 files changed, 15 insertions, 5 deletions
diff --git a/openbb_platform/core/openbb_core/provider/standard_models/cpi.py b/openbb_platform/core/openbb_core/provider/standard_models/cpi.py
index f43524063eb..24a94721864 100644
--- a/openbb_platform/core/openbb_core/provider/standard_models/cpi.py
+++ b/openbb_platform/core/openbb_core/provider/standard_models/cpi.py
@@ -1,6 +1,7 @@
 """CPI Standard Model."""
+
 from datetime import date as dateType
-from typing import List, Literal, Optional
+from typing import Literal, Optional
 
 from dateutil import parser
 from pydantic import Field, field_validator
@@ -11,8 +12,9 @@ from openbb_core.provider.utils.descriptions import (
     DATA_DESCRIPTIONS,
     QUERY_DESCRIPTIONS,
 )
+from openbb_core.provider.utils.helpers import check_item
 
-CPI_COUNTRIES = Literal[
+CPI_COUNTRIES = [
     "australia",
     "austria",
     "belgium",
@@ -72,9 +74,7 @@ CPI_FREQUENCY = Literal["monthly", "quarter", "annual"]
 class ConsumerPriceIndexQueryParams(QueryParams):
     """CPI Query."""
 
-    countries: List[CPI_COUNTRIES] = Field(
-        description=QUERY_DESCRIPTIONS.get("countries")
-    )
+    country: str = Field(description=QUERY_DESCRIPTIONS.get("country"))
     units: CPI_UNITS = Field(
         default="growth_same",
         description=QUERY_DESCRIPTIONS.get("units", "")
@@ -102,6 +102,16 @@ class ConsumerPriceIndexQueryParams(QueryParams):
         default=None, description=QUERY_DESCRIPTIONS.get("end_date")
     )
 
+    @field_validator("country", mode="before", check_fields=False)
+    def validate_country(cls, c: str):  # pylint: disable=E0213
+        """Validate country."""
+        result = []
+        values = c.split(",")
+        for v in values:
+            check_item(v.lower(), CPI_COUNTRIES)
+            result.append(v.lower())
+        return ",".join(result)
+
 
 class ConsumerPriceIndexData(Data):
     """CPI data."""