diff --git a/easy_my_coop_api/services/__init__.py b/easy_my_coop_api/services/__init__.py
index d657c40..546abd6 100644
--- a/easy_my_coop_api/services/__init__.py
+++ b/easy_my_coop_api/services/__init__.py
@@ -1,2 +1,3 @@
 from . import ping_service
 from . import subscription_request_service
+from . import account_invoice_service
diff --git a/easy_my_coop_api/services/account_invoice_service.py b/easy_my_coop_api/services/account_invoice_service.py
index e69de29..1eda236 100644
--- a/easy_my_coop_api/services/account_invoice_service.py
+++ b/easy_my_coop_api/services/account_invoice_service.py
@@ -0,0 +1,81 @@
+# Copyright 2019 Coop IT Easy SCRL fs
+#   Robin Keunen <robin@coopiteasy.be>
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+# pylint: disable=consider-merging-classes-inherited
+
+import logging
+
+from werkzeug.exceptions import NotFound
+
+from odoo import _
+from odoo.fields import Date
+
+from odoo.addons.base_rest.http import wrapJsonException
+from odoo.addons.component.core import Component
+
+from . import schemas
+
+_logger = logging.getLogger(__name__)
+
+
+class AccountInvoiceService(Component):
+    _inherit = "base.rest.service"
+    _name = "account.invoice.services"
+    _usage = "invoice"
+    _collection = "emc.services"
+    _description = """
+        Account Invoice Services
+    """
+
+    def get(self, _id):
+        sr = self.env["account.invoice"].search(
+            [("_api_external_id", "=", _id)]
+        )
+        if sr:
+            return self._to_dict(sr)
+        else:
+            raise wrapJsonException(
+                NotFound(_("No invoice found for id %s") % _id)
+            )
+
+    def _to_dict(self, invoice):
+        invoice.ensure_one()
+
+        if invoice.subscription_request:
+            sr_external_id = invoice.subscription_request.get_api_external_id()
+        else:
+            sr_external_id = None
+
+        # todo return dictionaries for Many2one fields
+        data = {
+            "id": invoice.get_api_external_id(),
+            "name": invoice.name,
+            "state": invoice.state,
+            "type": invoice.type,
+            "date": Date.to_string(invoice.date),
+            "date_due": Date.to_string(invoice.date_due),
+            "date_invoice": Date.to_string(invoice.date_invoice),
+            "partner": invoice.partner_id.get_api_external_id(),
+            "journal": invoice.journal_id.get_api_external_id(),
+            "account": invoice.account_id.get_api_external_id(),
+            "subscription_request": sr_external_id,
+            "invoice_lines": [
+                self._line_to_dict(line) for line in invoice.invoice_line_ids
+            ],
+        }
+        return data
+
+    def _line_to_dict(self, line):
+        return {
+            "name": line.name,
+            "account": line.account_id.get_api_external_id(),
+            "product": line.product_id.product_tmpl_id.get_api_external_id(),
+            "quantity": line.quantity,
+            "price_unit": line.price_unit,
+        }
+
+    def _validator_get(self):
+        return schemas.S_INVOICE_GET
+
+    def _validator_return_get(self):
+        return schemas.S_INVOICE_RETURN_GET
diff --git a/easy_my_coop_api/services/schemas.py b/easy_my_coop_api/services/schemas.py
index 2b374f4..a1886fc 100644
--- a/easy_my_coop_api/services/schemas.py
+++ b/easy_my_coop_api/services/schemas.py
@@ -9,7 +9,7 @@ from odoo.fields import Date
 def date_validator(field, value, error):
     try:
         Date.from_string(value)
-    except ValueError as e:
+    except ValueError:
         return error(
             field, _("{} does not match format '%Y-%m-%d'".format(value))
         )
@@ -101,3 +101,36 @@ S_SUBSCRIPTION_REQUEST_UPDATE = {
 }
 
 S_SUBSCRIPTION_REQUEST_VALIDATE = {"_id": {"type": "integer"}}
+
+S_INVOICE_GET = {"_id": {"type": "integer"}}
+
+S_INVOICE_LINE_RETURN_GET = {
+    "type": "list",
+    "schema": {
+        "type": "dict",
+        "schema": {
+            "name": {"type": "string", "required": True},
+            "account": {"type": "integer", "required": True},
+            "product": {"type": "integer", "required": True},
+            "quantity": {"type": "float", "required": True},
+            "price_unit": {"type": "float", "required": True},
+        },
+    },
+    "required": True,
+    "empty": True,
+}
+
+S_INVOICE_RETURN_GET = {
+    "id": {"type": "integer", "required": True},
+    "name": {"type": "string", "required": True, "empty": False},
+    "state": {"type": "string", "required": True, "empty": False},
+    "type": {"type": "string", "required": True, "empty": False},
+    "date": {"type": "string", "required": True, "empty": False},
+    "date_due": {"type": "string", "required": True, "empty": False},
+    "date_invoice": {"type": "string", "required": True, "empty": False},
+    "partner": {"type": "integer", "required": True},
+    "journal": {"type": "integer", "required": True},
+    "account": {"type": "integer", "required": True},
+    "subscription_request": {"type": "integer", "nullable": True},
+    "invoice_lines": S_INVOICE_LINE_RETURN_GET,
+}
diff --git a/easy_my_coop_api/tests/__init__.py b/easy_my_coop_api/tests/__init__.py
index a7be43d..b3a4cd1 100644
--- a/easy_my_coop_api/tests/__init__.py
+++ b/easy_my_coop_api/tests/__init__.py
@@ -2,3 +2,4 @@ from . import test_ping
 from . import test_registry
 from . import test_external_id_mixin
 from . import test_subscription_requests
+from . import test_account_invoice
diff --git a/easy_my_coop_api/tests/common.py b/easy_my_coop_api/tests/common.py
index d959400..763b66b 100644
--- a/easy_my_coop_api/tests/common.py
+++ b/easy_my_coop_api/tests/common.py
@@ -24,6 +24,163 @@ class BaseEMCRestCase(BaseRestCase):
         cls.api_key_test = cls.env.ref(
             "easy_my_coop_api.auth_api_key_manager_emc_demo"
         )
+        cls._chart_template_create()
+        cls._add_chart_of_accounts()
+        cls._journals_setup()
+
+    def setUp(self):
+        super().setUp()
+        self.session = requests.Session()
+
+    @classmethod
+    def _chart_template_create(cls):
+        transfer_account_id = cls.env["account.account.template"].create(
+            {
+                "code": "000",
+                "name": "Liquidity Transfers",
+                "reconcile": True,
+                "user_type_id": cls.env.ref(
+                    "account.data_account_type_current_assets"
+                ).id,
+            }
+        )
+        cls.chart = cls.env["account.chart.template"].create(
+            {
+                "name": "Test COA",
+                "code_digits": 4,
+                "bank_account_code_prefix": 1014,
+                "cash_account_code_prefix": 1014,
+                "currency_id": cls.env.ref("base.USD").id,
+                "transfer_account_code_prefix": "000",
+            }
+        )
+        transfer_account_id.update({"chart_template_id": cls.chart.id})
+        cls.env["ir.model.data"].create(
+            {
+                "res_id": transfer_account_id.id,
+                "model": transfer_account_id._name,
+                "name": "Liquidity Transfers",
+            }
+        )
+        act = cls.env["account.account.template"].create(
+            {
+                "code": "001",
+                "name": "Expenses",
+                "user_type_id": cls.env.ref(
+                    "account.data_account_type_expenses"
+                ).id,
+                "chart_template_id": cls.chart.id,
+                "reconcile": True,
+            }
+        )
+        cls.env["ir.model.data"].create(
+            {"res_id": act.id, "model": act._name, "name": "expenses"}
+        )
+        act = cls.env["account.account.template"].create(
+            {
+                "code": "002",
+                "name": "Product Sales",
+                "user_type_id": cls.env.ref(
+                    "account.data_account_type_revenue"
+                ).id,
+                "chart_template_id": cls.chart.id,
+                "reconcile": True,
+            }
+        )
+        cls.env["ir.model.data"].create(
+            {"res_id": act.id, "model": act._name, "name": "sales"}
+        )
+        act = cls.env["account.account.template"].create(
+            {
+                "code": "003",
+                "name": "Account Receivable",
+                "user_type_id": cls.env.ref(
+                    "account.data_account_type_receivable"
+                ).id,
+                "chart_template_id": cls.chart.id,
+                "reconcile": True,
+            }
+        )
+        cls.env["ir.model.data"].create(
+            {"res_id": act.id, "model": act._name, "name": "receivable"}
+        )
+        act = cls.env["account.account.template"].create(
+            {
+                "code": "004",
+                "name": "Account Payable",
+                "user_type_id": cls.env.ref(
+                    "account.data_account_type_payable"
+                ).id,
+                "chart_template_id": cls.chart.id,
+                "reconcile": True,
+            }
+        )
+        cls.env["ir.model.data"].create(
+            {"res_id": act.id, "model": act._name, "name": "payable"}
+        )
+
+    @classmethod
+    def _add_chart_of_accounts(cls):
+        cls.company = cls.env.user.company_id
+        cls.chart.try_loading_for_current_company()
+        cls.revenue = cls.env["account.account"].search(
+            [
+                (
+                    "user_type_id",
+                    "=",
+                    cls.env.ref("account.data_account_type_revenue").id,
+                )
+            ],
+            limit=1,
+        )
+        cls.expense = cls.env["account.account"].search(
+            [
+                (
+                    "user_type_id",
+                    "=",
+                    cls.env.ref("account.data_account_type_expenses").id,
+                )
+            ],
+            limit=1,
+        )
+        cls.receivable = cls.env["account.account"].search(
+            [
+                (
+                    "user_type_id",
+                    "=",
+                    cls.env.ref("account.data_account_type_receivable").id,
+                )
+            ],
+            limit=1,
+        )
+        cls.payable = cls.env["account.account"].search(
+            [
+                (
+                    "user_type_id",
+                    "=",
+                    cls.env.ref("account.data_account_type_payable").id,
+                )
+            ],
+            limit=1,
+        )
+        cls.equity_account = cls.env.ref("easy_my_coop.account_equity_demo")
+        cls.cooperator_account = cls.env.ref(
+            "easy_my_coop.account_cooperator_demo"
+        )
+        return True
+
+    @classmethod
+    def _journals_setup(cls):
+        cls.subscription_journal = cls.env.ref(
+            "easy_my_coop.subscription_journal"
+        )
+        cls.subscription_journal.write(
+            {
+                "default_debit_account_id": cls.equity_account.id,
+                "default_credit_account_id": cls.equity_account.id,
+            }
+        )
+        return True
 
     def _add_api_key(self, headers):
         key_dict = {"API-KEY": self.api_key_test.key}
@@ -33,10 +190,6 @@ class BaseEMCRestCase(BaseRestCase):
             headers = key_dict
         return headers
 
-    def setUp(self):
-        super().setUp()
-        self.session = requests.Session()
-
     def http_get(self, url, headers=None):
         headers = self._add_api_key(headers)
         if url.startswith("/"):
diff --git a/easy_my_coop_api/tests/test_account_invoice.py b/easy_my_coop_api/tests/test_account_invoice.py
new file mode 100644
index 0000000..3fdf07a
--- /dev/null
+++ b/easy_my_coop_api/tests/test_account_invoice.py
@@ -0,0 +1,101 @@
+# Copyright 2020 Coop IT Easy SCRL fs
+#   Robin Keunen <robin@coopiteasy.be>
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl.html).
+
+from odoo.fields import Date
+
+from odoo.addons.base_rest.controllers.main import _PseudoCollection
+from odoo.addons.component.core import WorkContext
+
+from .common import BaseEMCRestCase
+
+
+class TestAccountInvoiceController(BaseEMCRestCase):
+    @classmethod
+    def setUpClass(cls, *args, **kwargs):
+        super().setUpClass(*args, **kwargs)
+
+    def setUp(self):
+        res = super().setUp()
+        collection = _PseudoCollection("emc.services", self.env)
+        emc_services_env = WorkContext(
+            model_name="rest.service.registration", collection=collection
+        )
+        self.ai_service = emc_services_env.component(usage="invoice")
+
+        self.share_type_A = self.browse_ref(
+            "easy_my_coop.product_template_share_type_1_demo"
+        )
+        self._capital_release_create()
+
+        today = Date.to_string(Date.today())
+        self.demo_invoice_dict = {
+            "id": 1,
+            "name": "Capital Release Example",
+            "partner": 1,
+            "account": 1,
+            "journal": 1,
+            "subscription_request": None,
+            "state": "open",
+            "date": today,
+            "date_invoice": today,
+            "date_due": today,
+            "type": "out_invoice",
+            "invoice_lines": [
+                {
+                    "account": 2,
+                    "name": "Share Type A",
+                    "price_unit": 100.0,
+                    "product": 1,
+                    "quantity": 2.0,
+                }
+            ],
+        }
+        return res
+
+    def _capital_release_create(self):
+        self.coop_candidate = self.env["res.partner"].create(
+            {
+                "name": "Catherine des Champs",
+                "company_id": self.company.id,
+                "property_account_receivable_id": self.receivable.id,
+                "property_account_payable_id": self.payable.id,
+            }
+        )
+
+        capital_release_line = [
+            (
+                0,
+                False,
+                {
+                    "name": "Share Type A",
+                    "account_id": self.equity_account.id,
+                    "quantity": 2.0,
+                    "price_unit": 100.0,
+                    "product_id": self.share_type_A.product_variant_id.id,
+                },
+            )
+        ]
+
+        self.capital_release = self.env["account.invoice"].create(
+            {
+                "name": "Capital Release Example",
+                "partner_id": self.coop_candidate.id,
+                "type": "out_invoice",
+                "invoice_line_ids": capital_release_line,
+                "account_id": self.cooperator_account.id,
+                "journal_id": self.subscription_journal.id,
+            }
+        )
+        self.capital_release.action_invoice_open()
+
+    def test_service_get(self):
+        external_id = self.capital_release.get_api_external_id()
+        result = self.ai_service.get(external_id)
+        self.assertEquals(self.demo_invoice_dict, result)
+
+    def test_route_get(self):
+        external_id = self.capital_release.get_api_external_id()
+        route = "/api/invoice/%s" % external_id
+        content = self.http_get_content(route)
+        self.assertEquals(self.demo_invoice_dict, content)