diff --git a/pkg/api/store_test.go b/pkg/api/store_test.go
new file mode 100644
index 00000000..6611e230
--- /dev/null
+++ b/pkg/api/store_test.go
@@ -0,0 +1,209 @@
+// Copyright 2023 The Archivista Contributors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package api_test
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"testing"
+
+	"github.com/in-toto/archivista/pkg/api"
+	"github.com/in-toto/go-witness/dsse"
+	"github.com/stretchr/testify/suite"
+)
+
+// Test Suite: UT APIStore
+type UTAPIStoreSuite struct {
+	suite.Suite
+}
+
+func TestAPIStoreSuite(t *testing.T) {
+	suite.Run(t, new(UTAPIStoreSuite))
+}
+
+func (ut *UTAPIStoreSuite) Test_Store() {
+
+	testServer := httptest.NewServer(
+		http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusOK)
+				_, err := w.Write([]byte(`{"gitoid":"test"}`))
+				if err != nil {
+					ut.FailNow(err.Error())
+				}
+			},
+		),
+	)
+	defer testServer.Close()
+	ctx := context.TODO()
+
+	// load test valid test file and parse the dsse envelop
+	attFile, err := os.ReadFile("../../test/package.attestation.json")
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+	attEnvelop := &dsse.Envelope{}
+	err = json.Unmarshal(attFile, &attEnvelop)
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+
+	// test api.Store happy flow
+	resp, err := api.Store(ctx, testServer.URL, *attEnvelop)
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+
+	ut.Equal(resp, api.StoreResponse{Gitoid: "test"})
+}
+
+func (ut *UTAPIStoreSuite) Test_StoreWithReader() {
+
+	// mock server
+	testServer := httptest.NewServer(
+		http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusOK)
+				_, err := w.Write([]byte(`{"gitoid":"test"}`))
+				if err != nil {
+					ut.FailNow(err.Error())
+				}
+			},
+		),
+	)
+	defer testServer.Close()
+
+	// io.Reader file
+	attIo, err := os.Open("../../test/package.attestation.json")
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+
+	// context
+	ctx := context.TODO()
+
+	resp, err := api.StoreWithReader(ctx, testServer.URL, attIo)
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+	ut.Equal(resp, api.StoreResponse{Gitoid: "test"})
+}
+
+func (ut *UTAPIStoreSuite) Test_StoreWithReader_NoServer() {
+
+	// io.Reader file
+	attIo, err := os.Open("../../test/package.attestation.json")
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+
+	// context
+	ctx := context.TODO()
+
+	resp, err := api.StoreWithReader(ctx, "http://invalid-archivista", attIo)
+	ut.Error(err)
+	ut.Equal(resp, api.StoreResponse{})
+}
+
+func (ut *UTAPIStoreSuite) Test_StoreWithReader_InvalidResponseBody() {
+
+	// mock server
+	testServer := httptest.NewServer(
+		http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusOK)
+				_, err := w.Write([]byte(`{"invalid":"invalid"}`))
+				if err != nil {
+					ut.FailNow(err.Error())
+				}
+			},
+		),
+	)
+	defer testServer.Close()
+
+	// io.Reader file
+	attIo, err := os.Open("../../test/package.attestation.json")
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+
+	// context
+	ctx := context.TODO()
+
+	resp, err := api.StoreWithReader(ctx, testServer.URL, attIo)
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+	ut.Equal(resp, api.StoreResponse{})
+}
+
+func (ut *UTAPIStoreSuite) Test_StoreWithReader_BadStatusCode() {
+
+	// mock server
+	testServer := httptest.NewServer(
+		http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusInternalServerError)
+				_, err := w.Write([]byte(`Internal Server Error`))
+				if err != nil {
+					ut.FailNow(err.Error())
+				}
+			},
+		),
+	)
+	defer testServer.Close()
+
+	// io.Reader file
+	attIo, err := os.Open("../../test/package.attestation.json")
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+
+	// context
+	ctx := context.TODO()
+
+	resp, err := api.StoreWithReader(ctx, testServer.URL, attIo)
+	ut.ErrorContains(err, "Internal Server Error")
+	ut.Equal(resp, api.StoreResponse{})
+}
+
+func (ut *UTAPIStoreSuite) Test_StoreWithReader_BadJSONBody() {
+
+	// mock server
+	testServer := httptest.NewServer(
+		http.HandlerFunc(
+			func(w http.ResponseWriter, r *http.Request) {
+				w.WriteHeader(http.StatusOK)
+			},
+		),
+	)
+	defer testServer.Close()
+
+	// io.Reader file
+	attIo, err := os.Open("../../test/package.attestation.json")
+	if err != nil {
+		ut.FailNow(err.Error())
+	}
+
+	// context
+	ctx := context.TODO()
+
+	resp, err := api.StoreWithReader(ctx, testServer.URL, attIo)
+	ut.ErrorContains(err, "unexpected end of JSON input")
+	ut.Equal(resp, api.StoreResponse{})
+}