diff --git a/.changeset/python-sdk-populate-by-name.md b/.changeset/python-sdk-populate-by-name.md
new file mode 100644
index 000000000..5256540c5
--- /dev/null
+++ b/.changeset/python-sdk-populate-by-name.md
@@ -0,0 +1,5 @@
+---
+"common-grants-sdk": patch
+---
+
+camelCase wire naming now comes from a shared alias generator on the model config instead of per-field `alias=` declarations. Validation and serialization use each field's `to_camel` alias, `populate_by_name` keeps snake_case construction working, and static type checkers now accept snake_case constructor calls like `SingleDateEvent(event_type=...)`, which bare `alias=` declarations made them reject. The config applies to `CommonGrantsBaseModel` and to the wire models that don't extend it (sorting, pagination, filters). Wire I/O is unchanged: every removed declaration matched its field's `to_camel` form exactly, and irregular wire names (`CustomField.schema_url` -> `"schema"`) keep explicit field-level aliases.
diff --git a/lib/python-sdk/common_grants_sdk/client/pagination.py b/lib/python-sdk/common_grants_sdk/client/pagination.py
index 7ebdc2567..f88862512 100644
--- a/lib/python-sdk/common_grants_sdk/client/pagination.py
+++ b/lib/python-sdk/common_grants_sdk/client/pagination.py
@@ -107,9 +107,9 @@ def wrapper(
 
         aggregated_pagination_info = PaginatedResultsInfo(
             page=1,
-            pageSize=len(items) or page_size,
-            totalItems=len(items),
-            totalPages=1,
+            page_size=len(items) or page_size,
+            total_items=len(items),
+            total_pages=1,
         )
 
         # Build aggregated response. Copy the first page's response so any extra
@@ -131,7 +131,7 @@ def wrapper(
             status=latest_response.status if latest_response else 200,
             message=latest_response.message if latest_response else "Success",
             items=cast(list[ItemsT], items),
-            paginationInfo=aggregated_pagination_info,
+            pagination_info=aggregated_pagination_info,
         )
 
     return wrapper
diff --git a/lib/python-sdk/common_grants_sdk/extensions/filters.py b/lib/python-sdk/common_grants_sdk/extensions/filters.py
index 8892095bc..6dda7a0bb 100644
--- a/lib/python-sdk/common_grants_sdk/extensions/filters.py
+++ b/lib/python-sdk/common_grants_sdk/extensions/filters.py
@@ -299,32 +299,19 @@ def _range(self, operator: RangeOperator, min: Any, max: Any) -> BaseModel:
 #: field (an alias-only set would silently drop snake_case keys into ``customFilters``).
 DEFAULT_FILTER_NAMES: frozenset[str] = frozenset(
     list(OppDefaultFilters.model_fields.keys())
-    + [v.alias for v in OppDefaultFilters.model_fields.values() if v.alias]
+    + [
+        name
+        for v in OppDefaultFilters.model_fields.values()
+        for name in (v.alias, v.validation_alias, v.serialization_alias)
+        if isinstance(name, str)
+    ]
 )
 
-# ---------------------------------------------------------------------------
-# Alias-normalization maps for classify_filters
-#
-# OppDefaultFilters uses snake_case field names with camelCase aliases but does NOT
-# set populate_by_name=True.  Pydantic v2 therefore requires the alias form when
-# constructing OppFilters via **kwargs — passing the snake_case field name silently
-# results in None (the alias is the required construction key).
-#
-# classify_filters normalizes consumer keys to the alias (or field-name for fields
-# without an alias) before passing them to OppFilters(**...):
-#   - snake_case keys with a camelCase alias → converted to the alias (closeDateRange)
-#   - camelCase alias keys → kept as-is (already the alias)
-#   - keys with no alias (e.g. "status") → kept as-is (snake == request key)
-# ---------------------------------------------------------------------------
-
-# Map from snake_case field name → camelCase alias (used for OppFilters construction).
-# Only fields that declare an alias are included; alias-form keys and fields without
-# aliases fall through ``_SNAKE_TO_ALIAS.get(key, key)`` unchanged — one lookup
-# normalizes all three key classes.
+# snake_case field name → camelCase wire alias, for OppFilters construction.
 _SNAKE_TO_ALIAS: dict[str, str] = {
-    field_name: field_info.alias
+    field_name: wire_name
     for field_name, field_info in OppDefaultFilters.model_fields.items()
-    if field_info.alias
+    if (wire_name := field_info.serialization_alias or field_info.alias)
 }
 
 # ---------------------------------------------------------------------------
@@ -598,15 +585,10 @@ def classify_filters(
     then validated against the known-model union, exactly like ad-hoc input. Call
     sites must pass the same resource/method strings the plugin declared.
 
-    Construction normalizes all default consumer keys to the form that
-    ``OppFilters(**kwargs)`` accepts.  Because ``OppDefaultFilters`` does NOT set
-    ``populate_by_name=True``, Pydantic v2 requires the alias form (e.g.
-    ``closeDateRange``) for aliased fields.  Snake_case keys (e.g.
-    ``close_date_range``) are therefore mapped to their alias via ``_SNAKE_TO_ALIAS``
-    before construction.  Fields without aliases (e.g. ``status``) pass through
-    unchanged.  The alternative — enabling ``populate_by_name=True`` on
-    ``OppFilters.model_config`` — is deliberately avoided: the classifier must not
-    modify core schema model config.
+    Default consumer keys are normalized to the wire alias via ``_SNAKE_TO_ALIAS``
+    before ``OppFilters(**kwargs)`` construction. ``populate_by_name`` would accept
+    either form directly, but normalizing first collapses a snake_case key and its
+    camelCase alias onto one kwarg instead of passing pydantic both.
 
     Args:
         routes: Plugin route declarations (used to identify registered custom filters).
@@ -636,10 +618,6 @@ def classify_filters(
         if key in DEFAULT_FILTER_NAMES:
             # Bucket 1: a standard filter. Validate it against the type declared for
             # that field (for example, "status" is validated as a StringArrayFilter).
-            # OppFilters is constructed with keyword arguments and does not set
-            # populate_by_name, so a snake_case key is first converted to its alias.
-            # Keys that are already in alias form, and keys that have no alias, pass
-            # through unchanged.
             alias_key = _SNAKE_TO_ALIAS.get(key, key)
             if alias_key in default_fields:
                 # Snake and camel forms of the same field normalize to one key.
@@ -670,9 +648,7 @@ def classify_filters(
                 raise error
             custom_buckets[key] = validated  # type: ignore[assignment]
 
-    # OppFilters requires the alias form for construction (populate_by_name is not set).
-    # Use "customFilters" (the alias) rather than "custom_filters" (the field name).
     return OppFilters(
         **default_fields,
-        customFilters=custom_buckets if custom_buckets else None,
+        custom_filters=custom_buckets if custom_buckets else None,
     )
diff --git a/lib/python-sdk/common_grants_sdk/extensions/schema.py b/lib/python-sdk/common_grants_sdk/extensions/schema.py
index 6e848e2c9..22746d926 100644
--- a/lib/python-sdk/common_grants_sdk/extensions/schema.py
+++ b/lib/python-sdk/common_grants_sdk/extensions/schema.py
@@ -217,8 +217,9 @@ def _output_field_names(model: type[BaseModel]) -> set[str]:
     """Valid top-level output keys for a model: field names plus their aliases."""
     names: set[str] = set(model.model_fields.keys())
     for info in model.model_fields.values():
-        if info.alias:
-            names.add(info.alias)
+        for alias in (info.alias, info.validation_alias, info.serialization_alias):
+            if isinstance(alias, str):
+                names.add(alias)
     return names
 
 
diff --git a/lib/python-sdk/common_grants_sdk/extensions/transforms.py b/lib/python-sdk/common_grants_sdk/extensions/transforms.py
index 4f3c0dbe9..61fc0cbab 100644
--- a/lib/python-sdk/common_grants_sdk/extensions/transforms.py
+++ b/lib/python-sdk/common_grants_sdk/extensions/transforms.py
@@ -48,8 +48,13 @@ def _validate_output_paths(
 
     valid_names: set[str] = set(model.model_fields.keys())
     for field_info in model.model_fields.values():
-        if field_info.alias:
-            valid_names.add(field_info.alias)
+        for alias in (
+            field_info.alias,
+            field_info.validation_alias,
+            field_info.serialization_alias,
+        ):
+            if isinstance(alias, str):
+                valid_names.add(alias)
 
     # Top-level handler invocations (rare but structurally valid) are not output keys
     output_keys = {k for k in mapping if k not in known_handlers}
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/base.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/base.py
index f3a5edc1c..5b7a876bc 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/base.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/base.py
@@ -1,10 +1,23 @@
 import json
 from typing import Self
 
-from pydantic import BaseModel, ConfigDict
+from pydantic import AliasGenerator, BaseModel, ConfigDict
+from pydantic.alias_generators import to_camel
 
 from common_grants_sdk.utils.transformation import transform_from_mapping
 
+# Generated (not field-level) aliases keep snake_case construction type-checking:
+# static checkers fall back to field names when the alias comes from a generator.
+# Field-level alias settings still override for irregular wire names.
+CAMEL_ALIASES = AliasGenerator(
+    validation_alias=to_camel,
+    serialization_alias=to_camel,
+)
+CAMEL_WIRE_CONFIG = ConfigDict(
+    populate_by_name=True,
+    alias_generator=CAMEL_ALIASES,
+)
+
 
 class CommonGrantsBaseModel(BaseModel):
     """Base model with common configuration and methods for CommonGrants models."""
@@ -12,6 +25,8 @@ class CommonGrantsBaseModel(BaseModel):
     model_config = ConfigDict(
         from_attributes=True,
         strict=False,  # Coerces strings to enums, datetimes, etc.
+        populate_by_name=True,
+        alias_generator=CAMEL_ALIASES,
     )
 
     def dump(self) -> dict:
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/custom.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/custom.py
index 907a20edc..335936d81 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/custom.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/custom.py
@@ -30,9 +30,10 @@ class CustomField(CommonGrantsBaseModel, Generic[V]):
     Generic over its value type ``V`` (default ``Any``): the bare ``CustomField``
     keeps the protocol's untyped-value behavior, while ``CustomField[int]`` (or a
     Pydantic model) gives plugin authors and consumers a concrete, inspectable
-    ``value`` type. ``populate_by_name`` plus ``validation_alias``/
-    ``serialization_alias`` keep JSON I/O camelCase (``fieldType``) while
-    snake_case field-name construction (``CustomField(field_type=...)``) type-checks.
+    ``value`` type. Wire naming comes from the base alias generator (camelCase
+    ``fieldType`` on the wire, ``CustomField(field_type=...)`` in code); the one
+    irregular wire name, ``schema_url`` -> ``"schema"``, keeps an explicit
+    field-level alias.
     """
 
     model_config = ConfigDict(populate_by_name=True)
@@ -44,8 +45,6 @@ class CustomField(CommonGrantsBaseModel, Generic[V]):
     )
     field_type: CustomFieldType = Field(
         ...,
-        validation_alias="fieldType",
-        serialization_alias="fieldType",
         description="The JSON schema type to use when de-serializing the `value` field",
     )
     schema_url: Optional[HttpUrl] = Field(
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/event.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/event.py
index c231db931..2c7fd53fc 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/event.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/event.py
@@ -29,7 +29,6 @@ class EventBase(CommonGrantsBaseModel):
     )
     event_type: EventType = Field(
         ...,
-        alias="eventType",
         description="Type of event",
     )
     description: Optional[str] = Field(
@@ -44,7 +43,6 @@ class SingleDateEvent(EventBase):
 
     event_type: Literal[EventType.SINGLE_DATE] = Field(
         EventType.SINGLE_DATE,
-        alias="eventType",
     )
     date: ISODate = Field(
         ...,
@@ -62,26 +60,21 @@ class DateRangeEvent(EventBase):
 
     event_type: Literal[EventType.DATE_RANGE] = Field(
         EventType.DATE_RANGE,
-        alias="eventType",
     )
     start_date: ISODate = Field(
         ...,
-        alias="startDate",
         description="Start date of the event in ISO 8601 format: YYYY-MM-DD",
     )
     start_time: Optional[ISOTime] = Field(
         default=None,
-        alias="startTime",
         description="Start time of the event in ISO 8601 format: HH:MM:SS",
     )
     end_date: ISODate = Field(
         ...,
-        alias="endDate",
         description="End date of the event in ISO 8601 format: YYYY-MM-DD",
     )
     end_time: Optional[ISOTime] = Field(
         default=None,
-        alias="endTime",
         description="End time of the event in ISO 8601 format: HH:MM:SS",
     )
 
@@ -92,7 +85,6 @@ class OtherEvent(EventBase):
 
     event_type: Literal[EventType.OTHER] = Field(
         EventType.OTHER,
-        alias="eventType",
     )
     details: Optional[str] = Field(
         default=None,
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/metadata.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/metadata.py
index 39230e400..6c67f29ba 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/metadata.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/fields/metadata.py
@@ -12,12 +12,10 @@ class SystemMetadata(CommonGrantsBaseModel):
 
     created_at: UTCDateTime = Field(
         ...,
-        alias="createdAt",
         description="The timestamp (in UTC) at which the record was created.",
     )
     last_modified_at: UTCDateTime = Field(
         ...,
-        alias="lastModifiedAt",
         description="The timestamp (in UTC) at which the record was last modified.",
     )
 
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/filters/opportunity.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/filters/opportunity.py
index dc2a04050..76b511b12 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/filters/opportunity.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/filters/opportunity.py
@@ -4,7 +4,7 @@
 
 from typing_extensions import TypedDict
 
-from ..base import CommonGrantsBaseModel
+from ..base import CAMEL_WIRE_CONFIG, CommonGrantsBaseModel
 from .base import DefaultFilter
 from .boolean import BooleanComparisonFilter
 from .date import DateComparisonFilter, DateRangeFilter
@@ -32,28 +32,26 @@
 class OppDefaultFilters(BaseModel):
     """Standard filters available for searching opportunities."""
 
+    model_config = CAMEL_WIRE_CONFIG
+
     status: Optional[StringArrayFilter] = Field(
         default=None,
         description="`status.value` matches one of the following values",
     )
     close_date_range: Optional[DateRangeFilter] = Field(
         default=None,
-        alias="closeDateRange",
         description="`keyDates.closeDate` is between the given range",
     )
     total_funding_available_range: Optional[MoneyRangeFilter] = Field(
         default=None,
-        alias="totalFundingAvailableRange",
         description="`funding.totalAmountAvailable` is between the given range",
     )
     min_award_amount_range: Optional[MoneyRangeFilter] = Field(
         default=None,
-        alias="minAwardAmountRange",
         description="`funding.minAwardAmount` is between the given range",
     )
     max_award_amount_range: Optional[MoneyRangeFilter] = Field(
         default=None,
-        alias="maxAwardAmountRange",
         description="`funding.maxAwardAmount` is between the given range",
     )
 
@@ -64,7 +62,6 @@ class OppFilters(OppDefaultFilters):
     custom_filters: Optional[dict[str, DefaultFilter]] = Field(
         default=None,
         description="Additional custom filters to apply to the search",
-        alias="customFilters",
     )
 
 
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_applicant_type.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_applicant_type.py
index f2941ac20..5ed782287 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_applicant_type.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_applicant_type.py
@@ -41,7 +41,6 @@ class ApplicantType(CommonGrantsBaseModel):
     )
     custom_value: Optional[str] = Field(
         default=None,
-        alias="customValue",
         description="A custom applicant type value, only meaningful when value='custom'",
     )
     description: Optional[str] = Field(
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_base.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_base.py
index 407adc47d..caea500b3 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_base.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_base.py
@@ -49,7 +49,6 @@ class OpportunityBase(SystemMetadata, CommonGrantsBaseModel, Generic[CF]):
     )
     key_dates: Optional[OppTimeline] = Field(
         default=None,
-        alias="keyDates",
         description="Key dates for the opportunity, such as when the application opens and closes",
     )
     source: Optional[HttpUrl] = Field(
@@ -58,12 +57,10 @@ class OpportunityBase(SystemMetadata, CommonGrantsBaseModel, Generic[CF]):
     )
     custom_fields: Optional[CF] = Field(
         default=None,
-        alias="customFields",
         description="Additional custom fields specific to this opportunity",
     )
     accepted_applicant_types: Optional[list[ApplicantType]] = Field(
         default=None,
-        alias="acceptedApplicantTypes",
         description="The type of applicant for the opportunity",
     )
 
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_funding.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_funding.py
index 5e237e64d..cdf5272a0 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_funding.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_funding.py
@@ -17,31 +17,25 @@ class OppFunding(CommonGrantsBaseModel):
     )
     total_amount_available: Optional[Money] = Field(
         default=None,
-        alias="totalAmountAvailable",
         description="Total amount of funding available for this opportunity",
     )
     min_award_amount: Optional[Money] = Field(
         default=None,
-        alias="minAwardAmount",
         description="Minimum amount of funding granted per award",
     )
     max_award_amount: Optional[Money] = Field(
         default=None,
-        alias="maxAwardAmount",
         description="Maximum amount of funding granted per award",
     )
     min_award_count: Optional[int] = Field(
         default=None,
-        alias="minAwardCount",
         description="Minimum number of awards granted",
     )
     max_award_count: Optional[int] = Field(
         default=None,
-        alias="maxAwardCount",
         description="Maximum number of awards granted",
     )
     estimated_award_count: Optional[int] = Field(
         default=None,
-        alias="estimatedAwardCount",
         description="Estimated number of awards that will be granted",
     )
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_status.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_status.py
index 6abb482b8..fe4de9357 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_status.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_status.py
@@ -36,7 +36,6 @@ class OppStatus(CommonGrantsBaseModel):
     )
     custom_value: Optional[str] = Field(
         default=None,
-        alias="customValue",
         description="A custom status value",
     )
     description: Optional[str] = Field(
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_timeline.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_timeline.py
index 682dfb082..17d5ff2fc 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_timeline.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/models/opp_timeline.py
@@ -13,16 +13,13 @@ class OppTimeline(CommonGrantsBaseModel):
 
     post_date: Optional[Event] = Field(
         default=None,
-        alias="postDate",
         description="The date (and time) at which the opportunity is posted",
     )
     close_date: Optional[Event] = Field(
         default=None,
-        alias="closeDate",
         description="The date (and time) at which the opportunity closes",
     )
     other_dates: Optional[dict[str, Event]] = Field(
         default=None,
-        alias="otherDates",
         description="An optional map of other key dates or events in the opportunity timeline",
     )
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/pagination.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/pagination.py
index 372c8b66b..c48c4fd74 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/pagination.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/pagination.py
@@ -2,6 +2,8 @@
 
 from pydantic import BaseModel, Field
 
+from .base import CAMEL_WIRE_CONFIG
+
 
 class PaginatedBase(BaseModel):
     """Parameters for pagination."""
@@ -13,12 +15,11 @@ class PaginatedBase(BaseModel):
     )
     page_size: int = Field(
         default=10,
-        alias="pageSize",
         description="The number of items per page",
         ge=1,
     )
 
-    model_config = {"populate_by_name": True}
+    model_config = CAMEL_WIRE_CONFIG
 
 
 class PaginatedBodyParams(PaginatedBase):
@@ -34,13 +35,11 @@ class PaginatedResultsInfo(PaginatedBase):
 
     total_items: int = Field(
         ...,
-        alias="totalItems",
         description="The total number of items",
     )
     total_pages: int = Field(
         ...,
-        alias="totalPages",
         description="The total number of pages",
     )
 
-    model_config = {"populate_by_name": True}
+    model_config = CAMEL_WIRE_CONFIG
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/requests/opportunity.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/requests/opportunity.py
index 36705a168..e71e3ea03 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/requests/opportunity.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/requests/opportunity.py
@@ -21,5 +21,5 @@ class OpportunitySearchRequest(BaseModel):
         default_factory=OppFilters,
         description="Filters to apply to the opportunity search",
     )
-    sorting: OppSorting = OppSorting(sortBy=OppSortBy.LAST_MODIFIED_AT)
+    sorting: OppSorting = OppSorting(sort_by=OppSortBy.LAST_MODIFIED_AT)
     pagination: PaginatedBodyParams = PaginatedBodyParams()
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/responses/opportunity.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/responses/opportunity.py
index 4e7a391a6..886d4ac7f 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/responses/opportunity.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/responses/opportunity.py
@@ -16,7 +16,6 @@ class OpportunitiesListResponse(DefaultResponse):
     pagination_info: PaginatedResultsInfo = Field(
         ...,
         description="The pagination details",
-        alias="paginationInfo",
     )
 
     model_config = {"populate_by_name": True}
@@ -29,17 +28,14 @@ class OpportunitiesSearchResponse(DefaultResponse):
     pagination_info: PaginatedResultsInfo = Field(
         ...,
         description="The pagination details",
-        alias="paginationInfo",
     )
     sort_info: SortedResultsInfo = Field(
         ...,
         description="The sorting details",
-        alias="sortInfo",
     )
     filter_info: FilterInfo[dict] = Field(
         ...,
         description="The filter details",
-        alias="filterInfo",
     )
 
     model_config = {"populate_by_name": True}
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/responses/success.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/responses/success.py
index 45bf2a02c..d8b9b8259 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/responses/success.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/responses/success.py
@@ -36,7 +36,6 @@ class Paginated(Success, Generic[ItemsT]):
     pagination_info: PaginatedResultsInfo = Field(
         ...,
         description="Details about the paginated results",
-        alias="paginationInfo",
     )
 
     model_config = {"populate_by_name": True}
@@ -48,7 +47,6 @@ class Sorted(Paginated[ItemsT], Generic[ItemsT]):
     sort_info: SortedResultsInfo = Field(
         ...,
         description="The sort order of the items",
-        alias="sortInfo",
     )
 
     model_config = {"populate_by_name": True}
@@ -72,7 +70,6 @@ class Filtered(Sorted[ItemsT], Generic[ItemsT, FilterT]):
     filter_info: FilterInfo[FilterT] = Field(
         ...,
         description="The filters applied to the response items",
-        alias="filterInfo",
     )
 
     model_config = {"populate_by_name": True}
diff --git a/lib/python-sdk/common_grants_sdk/schemas/pydantic/sorting.py b/lib/python-sdk/common_grants_sdk/schemas/pydantic/sorting.py
index 14a61f40c..a639bf928 100644
--- a/lib/python-sdk/common_grants_sdk/schemas/pydantic/sorting.py
+++ b/lib/python-sdk/common_grants_sdk/schemas/pydantic/sorting.py
@@ -5,6 +5,8 @@
 
 from pydantic import BaseModel, Field, model_validator
 
+from .base import CAMEL_WIRE_CONFIG
+
 
 class SortOrder(str, Enum):
     """Sort order enumeration."""
@@ -18,18 +20,16 @@ class SortBase(BaseModel):
 
     sort_by: Union[str, None] = Field(
         ...,
-        alias="sortBy",
         description="The field to sort by",
         examples=["lastModifiedAt"],
     )
     custom_sort_by: Optional[str] = Field(
         default=None,
-        alias="customSortBy",
         description="Implementation-defined sort key",
         examples=["customField"],
     )
 
-    model_config = {"populate_by_name": True}
+    model_config = CAMEL_WIRE_CONFIG
 
 
 class SortQueryParams(SortBase):
@@ -37,7 +37,6 @@ class SortQueryParams(SortBase):
 
     sort_order: Optional[SortOrder] = Field(
         default=None,
-        alias="sortOrder",
         description="The order to sort by",
         examples=[SortOrder.ASC],
     )
@@ -48,7 +47,6 @@ class SortBodyParams(SortBase):
 
     sort_order: Optional[SortOrder] = Field(
         default=None,
-        alias="sortOrder",
         description="The order to sort by",
         examples=[SortOrder.ASC],
     )
@@ -59,7 +57,6 @@ class SortedResultsInfo(SortBase):
 
     sort_order: str = Field(
         ...,
-        alias="sortOrder",
         description="The order in which the results are sorted",
     )
     errors: Optional[list[str]] = Field(
@@ -90,17 +87,14 @@ class OppSorting(BaseModel):
     sort_by: OppSortBy = Field(
         ...,
         description="The field to sort by",
-        alias="sortBy",
     )
     sort_order: str = Field(
         default="desc",
         description="The sort order (asc or desc)",
-        alias="sortOrder",
     )
     custom_sort_by: Optional[str] = Field(
         default=None,
         description="The custom field to sort by when sortBy is 'custom'",
-        alias="customSortBy",
     )
 
     @model_validator(mode="after")
@@ -111,4 +105,4 @@ def validate_custom_sort_by(self) -> "OppSorting":
             raise ValueError(e)
         return self
 
-    model_config = {"populate_by_name": True}
+    model_config = CAMEL_WIRE_CONFIG
diff --git a/lib/python-sdk/common_grants_sdk/utils/custom_fields.py b/lib/python-sdk/common_grants_sdk/utils/custom_fields.py
index c98db17ef..8378572b5 100644
--- a/lib/python-sdk/common_grants_sdk/utils/custom_fields.py
+++ b/lib/python-sdk/common_grants_sdk/utils/custom_fields.py
@@ -55,9 +55,13 @@ def _parse_extra_as_custom_fields(cls, values: Any) -> Any:
             if hasattr(cls, "model_fields"):
                 for attr, field_info in cls.model_fields.items():
                     known.add(attr)
-                    alias = getattr(field_info, "alias", None)
-                    if alias:
-                        known.add(alias)
+                    for alias in (
+                        getattr(field_info, "alias", None),
+                        getattr(field_info, "validation_alias", None),
+                        getattr(field_info, "serialization_alias", None),
+                    ):
+                        if isinstance(alias, str):
+                            known.add(alias)
             for key, val in list(values.items()):
                 if key not in known and isinstance(val, dict) and "fieldType" in val:
                     # Inject the key as the name if not already present
@@ -80,7 +84,7 @@ def _parse_extra_as_custom_fields(cls, values: Any) -> Any:
         __base__=cls,
         custom_fields=(
             Optional[CustomFieldsContainer],
-            Field(default=None, alias="customFields"),
+            Field(default=None),
         ),
     )
 
@@ -160,10 +164,10 @@ class OpportunityLegacyIdField(CustomField):
         CustomFieldForAttr = create_model(
             _create_model_name(name=name, key=key),
             __base__=CustomField,
-            # pin expected type (still accepts wire key "fieldType" via alias)
+            # pin expected type
             field_type=(
                 CustomFieldType,
-                Field(default=field.field_type, alias="fieldType"),
+                Field(default=field.field_type),
             ),
             # pin name and description from spec
             name=(str, Field(default=field.name or key)),
diff --git a/lib/python-sdk/tests/extensions/test_filters.py b/lib/python-sdk/tests/extensions/test_filters.py
index 8053c3db2..c22e6b4bf 100644
--- a/lib/python-sdk/tests/extensions/test_filters.py
+++ b/lib/python-sdk/tests/extensions/test_filters.py
@@ -247,12 +247,7 @@ def test_classify_empty_filters_dict_yields_empty_body():
 
 
 def test_classify_default_snake_form_of_aliased_key_normalizes_to_alias():
-    """A snake_case key for an aliased field lands in the named field, not customFilters.
-
-    Without the alias normalization, OppFilters(close_date_range=...) would be
-    silently dropped by pydantic (populate_by_name is not set) and the field would
-    stay None.
-    """
+    """A snake_case key for an aliased field lands in the named field, not customFilters."""
     result = classify_filters(
         SAMPLE_ROUTES,
         "opportunities",