diff --git a/mock/src/index.js b/mock/src/index.js
index c9386ab..3bbe995 100644
--- a/mock/src/index.js
+++ b/mock/src/index.js
@@ -7,7 +7,10 @@ app.use(express.json());
 const port = process.env.PORT || 9000;
 
 app.post("/auth", (req, res) => {
-  res.status(200).send({ token: "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJPbmxpbmUgSldUIEJ1aWxkZXIiLCJpYXQiOjE2NzYxNjQwMjEsImV4cCI6MTcwNzcwMDAyMSwiYXVkIjoid3d3LmV4YW1wbGUuY29tIiwic3ViIjoianJvY2tldEBleGFtcGxlLmNvbSIsIkdpdmVuTmFtZSI6IkpvaG5ueSIsIlN1cm5hbWUiOiJSb2NrZXQiLCJFbWFpbCI6Impyb2NrZXRAZXhhbXBsZS5jb20iLCJSb2xlIjpbIk1hbmFnZXIiLCJQcm9qZWN0IEFkbWluaXN0cmF0b3IiXX0.7D8EeZkX8uNKMiMuUXpd0isKQwvFK3c3BTiMMnQvzZY"});
+  res.status(200).send({
+    token:
+      "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJPbmxpbmUgSldUIEJ1aWxkZXIiLCJpYXQiOjE2NzYxNjQwMjEsImV4cCI6MTcwNzcwMDAyMSwiYXVkIjoid3d3LmV4YW1wbGUuY29tIiwic3ViIjoianJvY2tldEBleGFtcGxlLmNvbSIsIkdpdmVuTmFtZSI6IkpvaG5ueSIsIlN1cm5hbWUiOiJSb2NrZXQiLCJFbWFpbCI6Impyb2NrZXRAZXhhbXBsZS5jb20iLCJSb2xlIjpbIk1hbmFnZXIiLCJQcm9qZWN0IEFkbWluaXN0cmF0b3IiXX0.7D8EeZkX8uNKMiMuUXpd0isKQwvFK3c3BTiMMnQvzZY",
+  });
 });
 
 app.get("/likes", async (req, res) => {
@@ -20,6 +23,16 @@ app.get("/posts", async (req, res) => {
   res.status(200).send({ posts: posts });
 });
 
+app.get("/hashes", async (req, res) => {
+  res.header("Content-Type", "application/json");
+  res.status(200).send({ keys: { somekey: "somevalue" } });
+});
+
+app.post("/hashes", async (req, res) => {
+  res.header("Content-Type", "application/json");
+  res.status(201).send();
+});
+
 // Requests to R2 cloud storage
 app.put("/", async (req, res) => {
   res.status(200).send();
diff --git a/pkg/repo/api.go b/pkg/repo/api.go
index 2468bc4..da1b7be 100644
--- a/pkg/repo/api.go
+++ b/pkg/repo/api.go
@@ -1,6 +1,7 @@
 package repo
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"net/http"
@@ -110,3 +111,56 @@ func (api *APIService) GetPublishedPosts() (types.Posts, error) {
 
 	return posts, nil
 }
+
+func (api *APIService) GetHashbrown() (types.Hashbrown, error) {
+	// Use empty struct as default
+	hashbrown := types.Hashbrown{
+		Keys: make(map[string]string),
+	}
+
+	client := &http.Client{}
+	url := fmt.Sprintf("%s/hashes", api.Config.APIEndpoint)
+
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return hashbrown, types.WrapErr(err, "failed to build http request")
+	}
+	req.Header.Set("Authorization", api.AuthToken)
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return hashbrown, types.WrapErr(err, "http request failed")
+	}
+	defer resp.Body.Close()
+
+	err = json.NewDecoder(resp.Body).Decode(&hashbrown)
+	if err != nil {
+		return hashbrown, types.WrapErr(err, "failed to decode http response body")
+	}
+
+	return hashbrown, nil
+}
+
+func (api *APIService) PostHashbrown(hashbrown types.Hashbrown) error {
+	client := &http.Client{}
+	url := fmt.Sprintf("%s/hashes", api.Config.APIEndpoint)
+
+	hashbrownBytes, err := json.Marshal(hashbrown)
+	if err != nil {
+		return types.WrapErr(err, "failed to marshal hashbrown")
+	}
+
+	req, err := http.NewRequest("POST", url, bytes.NewBuffer(hashbrownBytes))
+	if err != nil {
+		return types.WrapErr(err, "failed to build http request")
+	}
+	req.Header.Set("Authorization", api.AuthToken)
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return types.WrapErr(err, "http request failed")
+	}
+	defer resp.Body.Close()
+
+	return nil
+}
diff --git a/pkg/repo/r2.go b/pkg/repo/r2.go
index 29d8137..76ae151 100644
--- a/pkg/repo/r2.go
+++ b/pkg/repo/r2.go
@@ -1,7 +1,6 @@
 package repo
 
 import (
-	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
@@ -58,29 +57,6 @@ func (r2 *R2Service) WriteString(key string, content string) error {
 	return r2.Put(key, strings.NewReader(content))
 }
 
-// List returns a full list of keys available in the R2 storage bucket.
-func (r2 *R2Service) List() (ListResponse, error) {
-	client := &http.Client{}
-	req, err := http.NewRequest("GET", r2.Config.R2Endpoint, nil)
-	if err != nil {
-		return ListResponse{}, types.WrapErr(err, "failed to build http request")
-	}
-	req.Header.Set("X-Access-Token", r2.Config.R2AccessToken)
-	resp, err := client.Do(req)
-	if err != nil {
-		return ListResponse{}, types.WrapErr(err, "http request failed")
-	}
-	defer resp.Body.Close()
-
-	var result ListResponse
-	err = json.NewDecoder(resp.Body).Decode(&result)
-	if err != nil {
-		return ListResponse{}, types.WrapErr(err, "failed to decode response body")
-	}
-
-	return result, nil
-}
-
 // Put writes a single object to the R2 storage bucket.
 func (r2 *R2Service) Put(key string, object io.Reader) error {
 	client := &http.Client{}
diff --git a/pkg/types/types.go b/pkg/types/types.go
index b54950a..4ecb3f7 100644
--- a/pkg/types/types.go
+++ b/pkg/types/types.go
@@ -115,7 +115,7 @@ type JSONFeedItem struct {
 // Hashbrown represents a set of hashes for given keys in R2.
 // Hashbrown is just a fun name.
 type Hashbrown struct {
-	Hashes map[string]string `json:"hashes"`
+	Keys map[string]string `json:"keys"`
 }
 
 // WrapErr wraps an error and returns a new one
diff --git a/pkg/web/main.go b/pkg/web/main.go
index 4ec28a5..03bb766 100644
--- a/pkg/web/main.go
+++ b/pkg/web/main.go
@@ -5,7 +5,6 @@ import (
 	"context"
 	"crypto/md5"
 	"encoding/hex"
-	"encoding/json"
 	"fmt"
 	"log/slog"
 	"strconv"
@@ -206,16 +205,21 @@ func Build(options Options) (string, error) {
 		return "", types.WrapErr(err, "failed one or more build steps")
 	}
 
+	// Fetch set of hashes for existing files in R2
+	// This will be used to determine if a file has changed, and to determine file deletions
+	logger.Info("fetching hashes for existing files")
+	hashbrown, err := api.GetHashbrown()
+	if err != nil {
+		logger.Warn("failed to fetch hashbrown, assuming all files are new; " + err.Error())
+	}
+	logger.Info("found " + strconv.Itoa(len(hashbrown.Keys)) + " existing hash(es)")
+
 	// Find difference between new and existing files
 	// Mark unused files for deletion
 	logger.Info("finding diff between new and existing files")
-	existingKeys, err := r2.List()
-	if err != nil {
-		return "", types.WrapErr(err, "failed to list existing files")
-	}
 
 	keysToDelete := []string{}
-	for _, existingKey := range existingKeys.Keys {
+	for existingKey, _ := range hashbrown.Keys {
 		found := false
 		for _, file := range files {
 			if file.GetKey() == existingKey {
@@ -224,38 +228,18 @@ func Build(options Options) (string, error) {
 			}
 		}
 
-		// TODO: Refactor, make this cleaner
-		if !found && existingKey != "hashbrown.json" {
+		if !found {
 			keysToDelete = append(keysToDelete, existingKey)
 		}
 	}
 	logger.Info("marking the following files for deletion: " + fmt.Sprint(keysToDelete))
 
-	// Fetch set of hashes for existing files in R2
-	// This will be used to determine if a file has changed
-	// TODO: Debug
-	logger.Info("fetching hashes for existing files")
-	hashbrown := types.Hashbrown{
-		Hashes: make(map[string]string),
-	}
-	responseBody, err := r2.Get("hashbrown.json")
-
-	if err == nil {
-		err = json.Unmarshal(responseBody, &hashbrown)
-		if err != nil {
-			logger.Warn("failed to unmarshal hashbrown, assuming all files are new; " + err.Error())
-		}
-	} else {
-		logger.Warn("failed to fetch hashbrown, assuming all files are new; " + err.Error())
-	}
-	logger.Info("found " + strconv.Itoa(len(hashbrown.Hashes)) + " existing hash(es)")
-
 	// Write all site files to destination (as well as backup location).
 	// Calculate hashes for each site file to determine whether or not to write, as well as to build a new hashbrown.
 	logger.Info("writing files to destination")
 
 	newHashbrown := types.Hashbrown{
-		Hashes: make(map[string]string),
+		Keys: make(map[string]string),
 	}
 
 	maxParallel := 35
@@ -286,13 +270,13 @@ func Build(options Options) (string, error) {
 		hash := hex.EncodeToString(hashBytes)
 
 		// Add hash to new hashbrown
-		newHashbrown.Hashes[key] = hash
+		newHashbrown.Keys[key] = hash
 
 		writeToDestination := true
 		writeToArchive := options.Archive
 
 		// Check if file has changed
-		if existingHash, ok := hashbrown.Hashes[key]; ok && existingHash == hash {
+		if existingHash, ok := hashbrown.Keys[key]; ok && existingHash == hash {
 			logger.Info("file has not changed, skipping: " + key)
 			writeToDestination = false
 		}
@@ -336,11 +320,7 @@ func Build(options Options) (string, error) {
 	}
 
 	logger.Info("writing new hashbrown")
-	hashbrownJSON, err := json.Marshal(newHashbrown)
-	if err != nil {
-		return "", types.WrapErr(err, "failed to marshal new hashbrown")
-	}
-	err = r2.WriteString("hashbrown.json", string(hashbrownJSON))
+	err = api.PostHashbrown(newHashbrown)
 	if err != nil {
 		return "", types.WrapErr(err, "failed to write new hashbrown")
 	}