diff --git a/meh_http_server_rest/Cargo.toml b/meh_http_server_rest/Cargo.toml
index d16f5b7..5474946 100644
--- a/meh_http_server_rest/Cargo.toml
+++ b/meh_http_server_rest/Cargo.toml
@@ -16,4 +16,4 @@ slog = { version = "2.6.0", default-features = false }
 
 [features]
 default = ["std"]
-std = ["meh_http_common/std", "meh_http_server/std", "slog/std"]
\ No newline at end of file
+std = ["meh_http_common/std", "meh_http_server/std", "slog/std", "serde/std", "serde_json/std"]
\ No newline at end of file
diff --git a/meh_http_server_rest/src/error_handler.rs b/meh_http_server_rest/src/error_handler.rs
index 07f20ab..4a7a03d 100644
--- a/meh_http_server_rest/src/error_handler.rs
+++ b/meh_http_server_rest/src/error_handler.rs
@@ -1,4 +1,5 @@
-use std::marker::PhantomData;
+use core::marker::PhantomData;
+use alloc::boxed::Box;
 use crate::{HandlerResult, RestErrorContext, middleware::{HttpMiddleware, HttpMiddlewareContext, HttpMiddlewareRunner}, response_builder::HttpResponseBuilder};
 use async_trait::async_trait;
 use meh_http_common::{resp::HttpStatusCodes};
diff --git a/meh_http_server_rest/src/extras.rs b/meh_http_server_rest/src/extras.rs
index 82fbd38..45ef902 100644
--- a/meh_http_server_rest/src/extras.rs
+++ b/meh_http_server_rest/src/extras.rs
@@ -1,9 +1,10 @@
-use std::{any::{Any, TypeId}, collections::HashMap};
-
+use core::any::{Any, TypeId};
+use alloc::collections::BTreeMap;
+use alloc::boxed::Box;
 
 #[derive(Default)]
 pub struct Extras {
-    extras: HashMap<TypeId, Box<dyn Any + Send + Sync>>,
+    extras: BTreeMap<TypeId, Box<dyn Any + Send + Sync>>,
 }
 impl Extras {
     pub fn get<'a, T: 'static>(&'a self) -> Option<&'a T>
diff --git a/meh_http_server_rest/src/helpers.rs b/meh_http_server_rest/src/helpers.rs
index e0f3629..551addf 100644
--- a/meh_http_server_rest/src/helpers.rs
+++ b/meh_http_server_rest/src/helpers.rs
@@ -1,5 +1,5 @@
-use std::marker::PhantomData;
-
+use core::marker::PhantomData;
+use alloc::boxed::Box;
 use meh_http_common::{req::HttpServerHeader, resp::HttpStatusCodes};
 use slog::{warn};
 use async_trait::async_trait;
diff --git a/meh_http_server_rest/src/lib.rs b/meh_http_server_rest/src/lib.rs
index 26f370e..b2418c3 100644
--- a/meh_http_server_rest/src/lib.rs
+++ b/meh_http_server_rest/src/lib.rs
@@ -13,13 +13,14 @@ pub mod response_builder;
 pub mod error_handler;
 pub mod quick_rest;
 
-use std::borrow::Cow;
 use meh_http_common::stack::{TcpError};
 use middleware::HttpMiddlewareContext;
 use response_builder::{HttpReponseComplete, HttpResponseBuilder};
 
 pub type RestResult<T = ()> = Result<T, RestError>;
 
+use alloc::borrow::Cow;
+
 #[derive(Debug)]
 pub enum RestError {
     TcpError(TcpError),
diff --git a/meh_http_server_rest/src/middleware.rs b/meh_http_server_rest/src/middleware.rs
index 5a7a8f1..5423c6d 100644
--- a/meh_http_server_rest/src/middleware.rs
+++ b/meh_http_server_rest/src/middleware.rs
@@ -1,4 +1,5 @@
-use std::{marker::PhantomData};
+use core::marker::PhantomData;
+use alloc::boxed::Box;
 use meh_http_common::{stack::TcpSocket};
 use async_trait::async_trait;
 use meh_http_server::HttpContext;
diff --git a/meh_http_server_rest/src/middleware_chain.rs b/meh_http_server_rest/src/middleware_chain.rs
index 903c680..1920491 100644
--- a/meh_http_server_rest/src/middleware_chain.rs
+++ b/meh_http_server_rest/src/middleware_chain.rs
@@ -1,6 +1,6 @@
-use std::marker::PhantomData;
-use std::ops::Add;
-
+use core::marker::PhantomData;
+use core::ops::Add;
+use alloc::boxed::Box;
 use crate::HandlerResult;
 use crate::middleware::HttpMiddlewareContext;
 use crate::middleware::HttpMiddlewareRunner;
diff --git a/meh_http_server_rest/src/middleware_fn.rs b/meh_http_server_rest/src/middleware_fn.rs
index 8d861d6..d08b69a 100644
--- a/meh_http_server_rest/src/middleware_fn.rs
+++ b/meh_http_server_rest/src/middleware_fn.rs
@@ -1,5 +1,5 @@
-use std::pin::Pin;
-
+use core::pin::Pin;
+use alloc::boxed::Box;
 use async_trait::async_trait;
 use futures::Future;
 use crate::{HandlerResult, HandlerResultOk, middleware::{HttpMiddleware, HttpMiddlewareContext, HttpMiddlewareRunner}, response_builder::HttpResponseBuilder};
diff --git a/meh_http_server_rest/src/openapi.rs b/meh_http_server_rest/src/openapi.rs
index f057f97..77c97cf 100644
--- a/meh_http_server_rest/src/openapi.rs
+++ b/meh_http_server_rest/src/openapi.rs
@@ -1,5 +1,7 @@
-use std::{borrow::Cow, collections::HashMap};
-
+use alloc::borrow::Cow;
+use alloc::collections::BTreeMap;
+use alloc::vec::Vec;
+use alloc::string::String;
 use serde::{Deserialize, Serialize};
 
 #[derive(Serialize, Deserialize, Clone)]
@@ -8,7 +10,7 @@ pub struct OpenApi {
     pub openapi_version: Cow<'static, str>,
     pub info: Info,
     pub servers: Vec<Server>,
-    pub paths: HashMap<Cow<'static, str>, Path>
+    pub paths: BTreeMap<String, Path>
 }
 
 #[derive(Serialize, Deserialize, Clone)]
@@ -27,7 +29,7 @@ pub struct Server {
 #[derive(Serialize, Deserialize, Clone)]
 pub struct Path {
     #[serde(flatten)]
-    pub methods: HashMap<Cow<'static, str>, PathMethod>
+    pub methods: BTreeMap<Cow<'static, str>, PathMethod>
 }
 
 #[derive(Serialize, Deserialize, Clone)]
@@ -39,13 +41,13 @@ pub struct PathMethod {
     #[serde(rename="requestBody")]
     #[serde(skip_serializing_if = "Option::is_none")]
     pub request_body: Option<RequestBody>,
-    pub responses: HashMap<Cow<'static, str>, Response>
+    pub responses: BTreeMap<Cow<'static, str>, Response>
 }
 
 #[derive(Serialize, Deserialize, Clone)]
 pub struct Response {
     pub description: Cow<'static, str>,    
-    pub content: HashMap<Cow<'static, str>, ResponseContent>
+    pub content: BTreeMap<Cow<'static, str>, ResponseContent>
 }
 
 #[derive(Serialize, Deserialize, Clone)]
@@ -56,7 +58,7 @@ pub struct ResponseContent {
 #[derive(Serialize, Deserialize, Clone)]
 pub struct RequestBody {
     pub required: bool,
-    pub content: HashMap<Cow<'static, str>, RequestContent>
+    pub content: BTreeMap<Cow<'static, str>, RequestContent>
 }
 
 #[derive(Serialize, Deserialize, Clone)]
diff --git a/meh_http_server_rest/src/quick_rest/mod.rs b/meh_http_server_rest/src/quick_rest/mod.rs
index fc003d6..56d435d 100644
--- a/meh_http_server_rest/src/quick_rest/mod.rs
+++ b/meh_http_server_rest/src/quick_rest/mod.rs
@@ -1,5 +1,11 @@
-use std::{borrow::Cow, collections::HashMap, marker::PhantomData};
-
+use alloc::borrow::Cow;
+use alloc::collections::BTreeMap;
+use alloc::string::String;
+use alloc::boxed::Box;
+use alloc::vec::Vec;
+use alloc::string::ToString;
+
+use core::marker::PhantomData;
 use meh_http_common::{req::HttpServerHeader, resp::HttpStatusCodes};
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
 use serde_json::{json, Map, Value};
@@ -21,12 +27,12 @@ use async_trait::async_trait;
 
 struct OpenApiContext {
     is_openapi_request: bool,
-    apis: HashMap<Cow<'static, str>, OpenApiContextApi>,
+    apis: BTreeMap<String, OpenApiContextApi>,
 }
 
 struct OpenApiContextApi {
     path: Cow<'static, str>,
-    paths: HashMap<Cow<'static, str>, Path>,
+    paths: BTreeMap<String, Path>,
     combined_getters: Vec<OpenApiGetter>,
 }
 
@@ -56,7 +62,7 @@ where
             return Ok(ctx.into());
         };
 
-        let mut paths = HashMap::new();
+        let mut paths = BTreeMap::<String, Path>::new();
         for (api_id, api) in &openapi.apis {
             let api_url = format!("{}", api_id);
 
@@ -108,7 +114,7 @@ where
                 },
             );
 
-            paths.extend(api.paths.clone());
+            paths.extend(api.paths.iter().map(|(k, v)| (k.clone().to_string(), v.clone())));
         }
 
         // handle the GET request
@@ -198,9 +204,10 @@ where
             == Some(true)
             && ctx.request.method.as_ref().map(|s| s.as_str()) == Some("GET");
 
+
         let open_api = OpenApiContext {
             is_openapi_request,
-            apis: HashMap::new(),
+            apis: BTreeMap::new()
         };
 
         ctx.extras.insert(open_api);
@@ -403,13 +410,13 @@ where
             if let Some(openapi_ctx) = ctx.extras.get_mut::<OpenApiContext>() {
                 openapi_ctx
                     .apis
-                    .entry(v.api.clone())
+                    .entry(v.api.to_string())
                     .or_insert_with(|| OpenApiContextApi {
                         path: v.api.clone(),
-                        paths: HashMap::new(),
+                        paths: BTreeMap::new(),
                         combined_getters: vec![],
                     });
-                openapi_ctx.apis.entry(v.api.clone()).and_modify(|e| {
+                openapi_ctx.apis.entry(v.api.to_string()).and_modify(|e| {
                     e.combined_getters.push(g);
                 });
             }
@@ -479,11 +486,11 @@ where
                     }
                 }
             );
-            let mut methods = HashMap::new();
+            let mut methods = BTreeMap::new();
 
             // get
             {
-                let mut response_contents = HashMap::new();
+                let mut response_contents = BTreeMap::new();
                 response_contents.insert(
                     "application/json".into(),
                     ResponseContent {
@@ -491,7 +498,7 @@ where
                     },
                 );
 
-                let mut responses = HashMap::new();
+                let mut responses = BTreeMap::new();
                 responses.insert(
                     "200".into(),
                     Response {
@@ -513,12 +520,12 @@ where
 
             // set
             {
-                let mut responses = HashMap::new();
+                let mut responses = BTreeMap::new();
                 responses.insert(
                     "204".into(),
                     Response {
                         description: "Successfully set the new value".into(),
-                        content: HashMap::new(),
+                        content: BTreeMap::new(),
                     },
                 );
 
@@ -543,16 +550,16 @@ where
                 );
             }
 
-            let p: Cow<str> = format!("{}/{}", api, id).into();
-            openapi.apis.entry(api.clone()).or_insert_with({
+            let p = format!("{}/{}", api, id);
+            openapi.apis.entry(api.clone().to_string()).or_insert_with({
                 let api = api.clone();
                 move || OpenApiContextApi {
                     path: api.clone().into(),
-                    paths: HashMap::new(),
+                    paths: BTreeMap::new(),
                     combined_getters: vec![],
                 }
             });
-            openapi.apis.entry(api.clone()).and_modify(|e| {
+            openapi.apis.entry(api.clone().to_string()).and_modify(|e| {
                 e.paths.insert(p, Path { methods });
             });
         };
diff --git a/meh_http_server_rest/src/response_builder.rs b/meh_http_server_rest/src/response_builder.rs
index d4ca9cf..208c2bc 100644
--- a/meh_http_server_rest/src/response_builder.rs
+++ b/meh_http_server_rest/src/response_builder.rs
@@ -1,5 +1,5 @@
-use std::ops::Deref;
-
+use core::ops::Deref;
+use alloc::vec::Vec;
 use meh_http_common::{req::HttpServerHeader, resp::{HttpResponseWriter, HttpStatusCodes}, stack::TcpSocket};
 use meh_http_server::HttpContext;