diff --git a/app/views/EditProject/UpdateProjectForm/ValidateProjectSpecifics/ObjectSourceInput/index.tsx b/app/views/EditProject/UpdateProjectForm/ValidateProjectSpecifics/ObjectSourceInput/index.tsx
index 7cb89db..e458ad6 100644
--- a/app/views/EditProject/UpdateProjectForm/ValidateProjectSpecifics/ObjectSourceInput/index.tsx
+++ b/app/views/EditProject/UpdateProjectForm/ValidateProjectSpecifics/ObjectSourceInput/index.tsx
@@ -1,11 +1,21 @@
-import { useContext } from 'react';
+import {
+    useContext,
+    useMemo,
+} from 'react';
+import {
+    isDefined,
+    isNotDefined,
+} from '@togglecorp/fujs';
 import {
     EntriesAsList,
     getErrorObject,
     LeafError,
     ObjectError,
 } from '@togglecorp/toggle-form';
+import { gql } from 'urql';
 
+import Alert from '#components/Alert';
+import Button from '#components/Button';
 import Container from '#components/Container';
 import AssetInput from '#components/domain/AssetInput';
 import RadioInput from '#components/RadioInput';
@@ -13,15 +23,45 @@ import TextInput from '#components/TextInput';
 import EnumsContext from '#contexts/EnumsContext';
 import {
     ProjectAssetInputTypeEnum,
+    useTestAoiObjectsQuery,
+    useTestTaskingManagerProjectQuery,
     ValidateObjectSourceTypeEnum,
 } from '#generated/types/graphql';
 import {
+    formatNumber,
     keySelector,
     labelSelector,
 } from '#utils/common';
 
 import { PartialValidateObjectSourceInputFields } from './schema';
 
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+const TEST_AOI_OBJECTS_QUERY = gql`
+query TestAoiObjects($assetId: ID, $projectId: ID, $ohsomeFilter: String) {
+    testAoiObjects(assetId: $assetId, projectId: $projectId, ohsomeFilter: $ohsomeFilter) {
+        ok
+        error
+        objectCount
+        assetId
+        projectId
+        ohsomeFilter
+    }
+}
+`;
+
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+const TEST_TASKING_MANAGER_PROJECT_QUERY = gql`
+query TestTaskingManagerProject($hotTmId: String, $ohsomeFilter: String) {
+    testTaskingManagerProject(hotTmId: $hotTmId, ohsomeFilter: $ohsomeFilter) {
+        ok
+        error
+        objectCount
+        hotTmId
+        ohsomeFilter
+    }
+}
+`;
+
 interface Props {
     value: PartialValidateObjectSourceInputFields | undefined,
     error: LeafError | ObjectError<PartialValidateObjectSourceInputFields>,
@@ -43,6 +83,37 @@ function ObjectSourceInput(props: Props) {
 
     const error = getErrorObject(formError);
 
+    const [
+        {
+            data: testAoiObjectsResponse,
+            fetching: testAoiObjectsPending,
+            error: testAoiObjectsError,
+        },
+        triggerTestAoiObjects,
+    ] = useTestAoiObjectsQuery({
+        variables: {
+            projectId,
+            assetId: value?.aoiGeometry,
+            ohsomeFilter: value?.ohsomeFilter,
+        },
+        pause: true,
+    });
+
+    const [
+        {
+            data: testTaskingManagerProjectResponse,
+            fetching: testTaskingManagerProjectPending,
+            error: testTaskingManagerProjectError,
+        },
+        triggerTestTaskingManagerProject,
+    ] = useTestTaskingManagerProjectQuery({
+        variables: {
+            hotTmId: value?.taskingManagerProjectId,
+            ohsomeFilter: value?.ohsomeFilter,
+        },
+        pause: true,
+    });
+
     const {
         validateObjectSourceTypeOptions,
     } = useContext(EnumsContext);
@@ -53,10 +124,175 @@ function ObjectSourceInput(props: Props) {
         TaskingManager,
     } = ValidateObjectSourceTypeEnum;
 
+    const headerDescription = useMemo(() => {
+        if (isNotDefined(value?.sourceType)) {
+            return null;
+        }
+
+        if (value.sourceType === AoiGeojsonFile) {
+            if (isDefined(testAoiObjectsError)) {
+                return (
+                    <Alert
+                        name="test-aoi-message"
+                        type="danger"
+                        title="Failed to validate AOI"
+                        description={testAoiObjectsError.message}
+                        fullWidth
+                        withoutShadow
+                    />
+                );
+            }
+
+            if (isNotDefined(testAoiObjectsResponse)) {
+                return null;
+            }
+
+            const {
+                testAoiObjects: {
+                    ok,
+                    error: testError,
+                    objectCount,
+                    assetId,
+                    ohsomeFilter,
+                },
+            } = testAoiObjectsResponse;
+
+            if (assetId !== value.aoiGeometry || ohsomeFilter !== value.ohsomeFilter) {
+                return null;
+            }
+
+            return (
+                <Alert
+                    name="test-aoi-message"
+                    type={ok ? 'success' : 'danger'}
+                    title={ok
+                        ? `AOI is valid. It contains ${formatNumber(objectCount)} object(s)`
+                        : 'Failed to validate AOI'}
+                    description={testError}
+                    fullWidth
+                    withoutShadow
+                />
+            );
+        }
+
+        if (value.sourceType === TaskingManager) {
+            if (isDefined(testTaskingManagerProjectError)) {
+                return (
+                    <Alert
+                        name="test-tasking-manager-project-message"
+                        type="danger"
+                        title="Failed to validate project AOI"
+                        description={testTaskingManagerProjectError.message}
+                        fullWidth
+                        withoutShadow
+                    />
+                );
+            }
+            if (isNotDefined(testTaskingManagerProjectResponse)) {
+                return null;
+            }
+
+            const {
+                testTaskingManagerProject: {
+                    ok,
+                    error: testError,
+                    objectCount,
+                    hotTmId,
+                    ohsomeFilter,
+                },
+            } = testTaskingManagerProjectResponse;
+
+            if (hotTmId !== value.taskingManagerProjectId || ohsomeFilter !== value.ohsomeFilter) {
+                return null;
+            }
+
+            return (
+                <Alert
+                    name="test-tasking-manager-project-message"
+                    type={ok ? 'success' : 'danger'}
+                    title={ok
+                        ? `Project is valid. It contains ${formatNumber(objectCount)} object(s)`
+                        : 'Failed to validate project AOI'}
+                    description={testError}
+                    fullWidth
+                    withoutShadow
+                />
+            );
+        }
+
+        return null;
+    }, [
+        AoiGeojsonFile,
+        TaskingManager,
+        testAoiObjectsResponse,
+        testAoiObjectsError,
+        testTaskingManagerProjectResponse,
+        testTaskingManagerProjectError,
+        value?.sourceType,
+        value?.taskingManagerProjectId,
+        value?.ohsomeFilter,
+        value?.aoiGeometry,
+    ]);
+
+    const actions = useMemo(() => {
+        if (isNotDefined(value?.sourceType)) {
+            return null;
+        }
+
+        if (value.sourceType === AoiGeojsonFile) {
+            if (isNotDefined(value?.aoiGeometry) || isNotDefined(value.ohsomeFilter)) {
+                return null;
+            }
+
+            return (
+                <Button
+                    name={undefined}
+                    onClick={triggerTestAoiObjects}
+                    disabled={testAoiObjectsPending}
+                >
+                    {testAoiObjectsPending ? 'Testing AOI on ohsome...' : 'Test AOI on ohsome'}
+                </Button>
+            );
+        }
+
+        if (value.sourceType === TaskingManager) {
+            if (isNotDefined(value.taskingManagerProjectId) || isNotDefined(value.ohsomeFilter)) {
+                return null;
+            }
+
+            return (
+                <Button
+                    name={undefined}
+                    onClick={triggerTestTaskingManagerProject}
+                    disabled={testTaskingManagerProjectPending}
+                >
+                    {testTaskingManagerProjectPending
+                        ? 'Testing Tasking Manager project AOI on ohsome...'
+                        : 'Test Tasking Manager project AOI on ohsome'}
+                </Button>
+            );
+        }
+
+        return null;
+    }, [
+        AoiGeojsonFile,
+        TaskingManager,
+        testAoiObjectsPending,
+        testTaskingManagerProjectPending,
+        triggerTestAoiObjects,
+        triggerTestTaskingManagerProject,
+        value?.aoiGeometry,
+        value?.ohsomeFilter,
+        value?.sourceType,
+        value?.taskingManagerProjectId,
+    ]);
+
     return (
         <Container
             heading="Validation Object Source"
             headingLevel={4}
+            headerDescription={headerDescription}
+            footerActions={actions}
         >
             <RadioInput
                 label="Source type"
diff --git a/app/views/NewProject/ProjectGeneralInputs/index.tsx b/app/views/NewProject/ProjectGeneralInputs/index.tsx
index c85fe90..7454095 100644
--- a/app/views/NewProject/ProjectGeneralInputs/index.tsx
+++ b/app/views/NewProject/ProjectGeneralInputs/index.tsx
@@ -32,7 +32,7 @@ import { DeepNonNullable } from '#utils/types';
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 const PROJECT_NAME_QUERY = gql`
 query ProjectName($params: ProjectNameInput) {
-  projectName(params: $params)
+    projectName(params: $params)
 }
 `;
 
diff --git a/backend b/backend
index 84010c0..e1b0df8 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit 84010c0ddda1efbd7ee611849dfcb8faed090018
+Subproject commit e1b0df8f3e270293b0b9fc9936254b4f859c61a9