diff --git a/.dockerignore b/.dockerignore
index 48e67b0..32c9036 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -2,3 +2,4 @@ bin/
 *.hurl
 .git/
 .jj/
+.direnv/
diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index ee961c0..f040bba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,4 +27,4 @@ go.work
 
 # End of https://www.toptal.com/developers/gitignore/api/go
 
-*.hurl
+.direnv/
diff --git a/README.org b/README.org
index cf91abf..86a67ac 100644
--- a/README.org
+++ b/README.org
@@ -7,18 +7,24 @@
 
 - [[https://hurl.dev][hurl]] :: CLI tool that runs http requests, similar to curl
 - [[https://docs.docker.com/desktop/][docker :: ]] Using docker to run project and mocks
+- [[https://just.systems/][just]] ::  CLI runner
 - [[https://jqlang.org/][jq]] :: (Optional) CLI tool to query JSON data
 
+If you're using nix, you can find a flake in the root of the project and run =nix develop= to download all the tools (or allow [[https://direnv.net/][direnv]] to auto import in your path)
+
 *** Usage
 
-Run the project with both providers mocked:
+Run docker compose to start mocks, the mocks will use ports =8002= and =8003= and the were created using [[https://github.com/mrak/stubby4node][stubby4node]]
 
 #+begin_src shell
 docker compose up
 #+end_src
 
-The docker compose file is configured to build and run 3 dockers, 2 being the mocked providers (Stripe and Braintree), they're both were created using [[https://github.com/mrak/stubby4node][stubby4node]] and the project.
-The main project will use port =8000= in your machine and the providers will use port =8001= and =8002= (this is mostly for running the main project outside docker).
+In another terminal, bulid and run the project with =just=, it will start the project in port =8000=
+
+#+begin_src shell
+just run
+#+end_src
 
 In other terminal, make the request with hurl
 
@@ -31,3 +37,11 @@ In case you want to see the response with json format, you can use jq
 #+begin_src shell
 hurl request.hurl | jq .
 #+end_src
+
+** Tests
+
+To run all tests, you can run the command that it will run all tests from the project:
+
+#+begin_src shell
+just test
+#+end_src
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..bc10f12
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1752012998,
+        "narHash": "sha256-Q82Ms+FQmgOBkdoSVm+FBpuFoeUAffNerR5yVV7SgT8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "2a2130494ad647f953593c4e84ea4df839fbd68c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..aadff9b
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,28 @@
+{
+  description = "A Nix-flake-based Golang development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        inherit (pkgs.lib) optional optionals;
+
+        pkgs = import nixpkgs { inherit system; };
+      in
+        {
+          devShells.default = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              go
+              hurl
+              just
+              jq
+            ];
+          };
+        }
+    );
+}
diff --git a/request.hurl b/request.hurl
index b98cc6f..d39d9bd 100644
--- a/request.hurl
+++ b/request.hurl
@@ -13,3 +13,4 @@ Content-Type: application/json
 	    "installments": 1
 	}
 }
+HTTP 200