diff --git a/src/db.zig b/src/db.zig
index 0a0f106..684ff31 100644
--- a/src/db.zig
+++ b/src/db.zig
@@ -1,5 +1,8 @@
+const root = @import("root");
+const Uuid = root.Uuid;
+
 pub const Actor = struct {
-    id: u128,
+    id: Uuid,
     display_name: ?[]const u8 = null,
     handle: []const u8,
     host: []const u8,
@@ -9,13 +12,13 @@ pub const Actor = struct {
 const this_host = "localhost:8080";
 
 const actor = Actor{
-    .id = 1234,
+    .id = Uuid.parse("f75f5160-12d3-42c2-a81d-ad2245b7a74b") catch unreachable,
     .handle = "testacct",
     .host = this_host,
 };
 
-pub fn getActorById(id: u128) !?Actor {
-    if (id == actor.id) return actor;
+pub fn getActorById(id: Uuid) !?Actor {
+    if (Uuid.eql(id, actor.id)) return actor;
 
     return null;
 }
diff --git a/src/main.zig b/src/main.zig
index 6ef975c..0871c15 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -6,6 +6,62 @@ pub const io_mode = .evented;
 const Reader = std.net.Stream.Reader;
 const Writer = std.net.Stream.Writer;
 
+pub const Uuid = struct {
+    data: [16]u8,
+
+    pub fn eql(lhs: Uuid, rhs: Uuid) bool {
+        return std.mem.eql(u8, &lhs.data, &rhs.data);
+    }
+
+    pub fn format(value: Uuid, comptime _: []const u8, _: std.fmt.FormatOptions, writer: anytype) !void {
+        try std.fmt.format(writer, "{x:0>2}{x:0>2}{x:0>2}{x:0>2}-{x:0>2}{x:0>2}-{x:0>2}{x:0>2}-{x:0>2}{x:0>2}-{x:0>2}{x:0>2}{x:0>2}{x:0>2}{x:0>2}{x:0>2}", .{
+            value.data[0],
+            value.data[1],
+            value.data[2],
+            value.data[3],
+            value.data[4],
+            value.data[5],
+            value.data[6],
+            value.data[7],
+            value.data[8],
+            value.data[9],
+            value.data[10],
+            value.data[11],
+            value.data[12],
+            value.data[13],
+            value.data[14],
+            value.data[15],
+        });
+    }
+
+    const ParseError = error{
+        InvalidCharacter,
+    };
+    pub fn parse(str: []const u8) ParseError!Uuid {
+        if (str.len < 36) return error.InvalidCharacter;
+
+        var uuid: Uuid = undefined;
+        var str_i: usize = 0;
+        var i: usize = 0;
+        while (i < 16 and str_i < str.len) : ({
+            i += 1;
+            str_i += 2;
+        }) {
+            uuid.data[i] = std.fmt.parseInt(u8, str[str_i .. str_i + 2], 16) catch |err| switch (err) {
+                error.InvalidCharacter => return error.InvalidCharacter,
+                else => unreachable,
+            };
+
+            if (i == 3 or i == 5 or i == 7 or i == 9) {
+                if (str[str_i + 2] != '-') return error.InvalidCharacter;
+                str_i += 1;
+            }
+        }
+
+        return uuid;
+    }
+};
+
 const ciutf8 = struct {
     const Hash = std.hash.Wyhash;
     const View = std.unicode.Utf8View;
@@ -508,18 +564,19 @@ const this_host = "localhost:8080";
 fn getUser(ctx: *Context) anyerror!void {
     const id_str = ctx.request.arg("id");
 
-    const host = ctx.request.headers.get("host");
-    if (host == null) {
+    const host = ctx.request.headers.get("host") orelse {
         try ctx.response.statusOnly(400);
         return;
-    }
+    };
+
+    const id = Uuid.parse(id_str) catch {
+        try ctx.response.statusOnly(400);
+        return;
+    };
 
-    const id = try std.fmt.parseInt(u128, id_str, 10);
     const actor = try db.getActorById(id);
 
-    if (actor == null or
-        !std.mem.eql(u8, actor.?.host, ctx.request.headers.get("host").?))
-    {
+    if (actor == null or !std.mem.eql(u8, actor.?.host, host)) {
         try ctx.response.statusOnly(404);
         return;
     }
@@ -546,6 +603,9 @@ pub fn main() anyerror!void {
     var srv = std.net.StreamServer.init(.{ .reuse_address = true });
     defer srv.deinit();
 
+    const uuid = try Uuid.parse("f75f5160-12d3-42c2-a81d-ad2245b7a74b");
+    std.log.debug("{}", .{uuid});
+
     try srv.listen(std.net.Address.parseIp("0.0.0.0", 8080) catch unreachable);
 
     while (true) {