diff --git a/CHANGELOG.md b/CHANGELOG.md
index b48829f..83b8764 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Added new methods `video` and `video_thumbnail` that return a video and video thumbnail related to a given mode, video name and customization - [ripe-white/#996](https://github.com/ripe-tech/ripe-white/issues/996)
 * General order chat methods - [ripe-core/#4702](https://github.com/ripe-tech/ripe-core/issues/4702)
 * Order tag methods - [ripe-robin-revamp/#363](https://github.com/ripe-tech/ripe-robin-revamp/issues/363)
+* Port `_query_to_spec`, `_unpack_query`, `_parse_extra_s`, `_tuples_to_parts`, `_parts_to_parts_m` from RIPE SDK JS
 
 ### Changed
 
diff --git a/setup.py b/setup.py
index 453d6dd..b306d5e 100644
--- a/setup.py
+++ b/setup.py
@@ -15,6 +15,7 @@
     url="http://www.platforme.com",
     zip_safe=False,
     packages=["ripe"],
+    test_suite="ripe.test",
     package_dir={"": os.path.normpath("src")},
     install_requires=["appier"],
     classifiers=[
diff --git a/src/ripe/base.py b/src/ripe/base.py
index 13b4c96..1327f0f 100644
--- a/src/ripe/base.py
+++ b/src/ripe/base.py
@@ -54,6 +54,127 @@ class API(
     transport_rule.TransportRuleAPI,
     availability_rule.AvailabilityRuleAPI,
 ):
+    @classmethod
+    def _query_to_spec(cls, query):
+        options = cls._unpack_query(query)
+        brand = options.get("brand", None)
+        model = options.get("model", None)
+        variant = options.get("variant", None)
+        version = options.get("version", None)
+        description = options.get("description", None)
+        initials = options.get("initials", None)
+        engraving = options.get("engraving", None)
+        gender = options.get("gender", None)
+        size = options.get("size", None)
+        meta = options.get("meta", [])
+        tuples = options.get("p", [])
+        tuples = tuples if isinstance(tuples, list) else [tuples]
+        initials_extra = options.get("initials_extra", [])
+        initials_extra = (
+            initials_extra if isinstance(initials_extra, list) else [initials_extra]
+        )
+        initials_extra = cls._parse_extra_s(initials_extra)
+        parts = cls._tuples_to_parts(tuples)
+        parts_m = cls._parts_to_parts_m(parts)
+        spec = dict(
+            brand=brand,
+            model=model,
+            parts=parts_m,
+            initials=initials,
+            engraving=engraving,
+            initials_extra=initials_extra,
+        )
+        if variant:
+            spec["variant"] = variant
+        if version:
+            spec["version"] = version
+        if description:
+            spec["description"] = description
+        if gender:
+            spec["gender"] = gender
+        if size:
+            spec["size"] = size
+        if meta:
+            spec["meta"] = cls._normalize_meta(meta)
+        return spec
+
+    @classmethod
+    def _unpack_query(cls, query):
+        query = query.strip("?")
+        parts = appier.split_unescape(query, "&")
+        options = dict()
+        for part in parts:
+            key, value = part.split("=")
+            if not key in options:
+                options[key] = value
+            elif isinstance(options[key], list):
+                options[key].append(value)
+            else:
+                options[key] = [options[key], value]
+        return options
+
+    @classmethod
+    def _parse_extra_s(cls, extra_s):
+        extra = dict()
+        for extra_i in extra_s:
+            name, initials, engraving = appier.split_unescape(extra_i, ":", 2)
+            extra[name] = dict(initials=initials, engraving=engraving or None)
+        return extra
+
+    @classmethod
+    def _tuples_to_parts(cls, tuples):
+        parts = []
+        for triplet in tuples:
+            name, material, color = appier.split_unescape(triplet, ":", 2)
+            part = dict(name=name, material=material, color=color)
+            parts.append(part)
+        return parts
+
+    @classmethod
+    def _parts_to_parts_m(cls, parts):
+        parts_m = dict()
+        for part in parts:
+            name = part["name"]
+            material = part["material"]
+            color = part["color"]
+            parts_m[name] = dict(material=material, color=color)
+        return parts_m
+
+    @classmethod
+    def _normalize_meta(cls, meta):
+        meta_d = {}
+        meta_l = (
+            [
+                appier.split_unescape(element, ":", 2)
+                if element.startswith("$")
+                else appier.split_unescape(element, ":", 1)
+                for element in meta
+            ]
+            if meta
+            else []
+        )
+        for parts in meta_l:
+            if len(parts) == 2:
+                parts = None, parts[0], parts[1]
+            type, key, value = parts
+            if key in meta_d:
+                old = meta_d[key]
+                is_sequence = isinstance(old, (list, tuple))
+                if not is_sequence:
+                    old = [old]
+                old.append(value)
+                value = old
+            if type == "$list" and not isinstance(value, list):
+                value = [value]
+            if type == "$int":
+                value = int(value)
+            if type == "$float":
+                value = float(value)
+            if type == "$bool":
+                value = value in ("1", "true", "True")
+            meta_d[key] = value
+        return meta_d
+
     def __init__(self, *args, **kwargs):
         appier.API.__init__(self, *args, **kwargs)
         self.base_url = appier.conf("RIPE_BASE_URL", RIPE_BASE_URL)
diff --git a/src/ripe/test/__init__.py b/src/ripe/test/__init__.py
new file mode 100644
index 0000000..5bcfe9b
--- /dev/null
+++ b/src/ripe/test/__init__.py
@@ -0,0 +1,2 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
diff --git a/src/ripe/test/base.py b/src/ripe/test/base.py
new file mode 100644
index 0000000..cf9fe07
--- /dev/null
+++ b/src/ripe/test/base.py
@@ -0,0 +1,90 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+import unittest
+
+import ripe
+
+
+class APITest(unittest.TestCase):
+    def test__query_to_spec(self):
+        result = ripe.API._query_to_spec(
+            "brand=dummy&model=dummy&locale=en_us&format=webp&initials=AAA&engraving=grey&initials_extra=main:AAA:grey&p=side:leather_dmy:black&p=piping:leather_dmy:black&p=top0_bottom:leather_dmy:black&p=shadow:default:default"
+        )
+        self.assertEqual(
+            result,
+            dict(
+                brand="dummy",
+                model="dummy",
+                parts=dict(
+                    side=dict(material="leather_dmy", color="black"),
+                    piping=dict(material="leather_dmy", color="black"),
+                    top0_bottom=dict(material="leather_dmy", color="black"),
+                    shadow=dict(material="default", color="default"),
+                ),
+                initials="AAA",
+                engraving="grey",
+                initials_extra=dict(main=dict(engraving="grey", initials="AAA")),
+            ),
+        )
+
+    def test__unpack_query(self):
+        result = ripe.API._unpack_query(
+            "brand=dummy&model=dummy&p=sole:rubber:red&p=laces:metal:black"
+        )
+        self.assertEqual(
+            result,
+            dict(
+                brand="dummy", model="dummy", p=["sole:rubber:red", "laces:metal:black"]
+            ),
+        )
+
+        result = ripe.API._unpack_query(
+            "?brand=dummy&model=dummy&p=sole:rubber:red&p=laces:metal:black"
+        )
+        self.assertEqual(
+            result,
+            dict(
+                brand="dummy", model="dummy", p=["sole:rubber:red", "laces:metal:black"]
+            ),
+        )
+
+    def test__parse_extra_s(self):
+        result = ripe.API._parse_extra_s(["name1:aaa:black", "name2:bbb:white"])
+        self.assertEqual(
+            result,
+            dict(
+                name1=dict(initials="aaa", engraving="black"),
+                name2=dict(initials="bbb", engraving="white"),
+            ),
+        )
+
+    def test__tuples_to_parts(self):
+        result = ripe.API._tuples_to_parts(
+            ["sole:rubber:red", "laces:metal:black", "side:rubber:white"]
+        )
+        self.assertEqual(
+            result,
+            [
+                dict(name="sole", material="rubber", color="red"),
+                dict(name="laces", material="metal", color="black"),
+                dict(name="side", material="rubber", color="white"),
+            ],
+        )
+
+    def test__parts_to_parts_m(self):
+        result = ripe.API._parts_to_parts_m(
+            [
+                dict(name="sole", material="rubber", color="red"),
+                dict(name="laces", material="metal", color="black"),
+                dict(name="side", material="rubber", color="white"),
+            ]
+        )
+        self.assertEqual(
+            result,
+            dict(
+                sole=dict(material="rubber", color="red"),
+                laces=dict(material="metal", color="black"),
+                side=dict(material="rubber", color="white"),
+            ),
+        )