diff --git a/IMPLEMENTATION_COVERAGE.md b/IMPLEMENTATION_COVERAGE.md
index dec6250a6..60e9bb278 100644
--- a/IMPLEMENTATION_COVERAGE.md
+++ b/IMPLEMENTATION_COVERAGE.md
@@ -5683,6 +5683,29 @@
 - [X] verify_email_identity
 </details>
 
+## signer
+<details>
+<summary>23% implemented</summary>
+
+- [ ] add_profile_permission
+- [X] cancel_signing_profile
+- [ ] describe_signing_job
+- [ ] get_signing_platform
+- [X] get_signing_profile
+- [ ] list_profile_permissions
+- [ ] list_signing_jobs
+- [X] list_signing_platforms
+- [ ] list_signing_profiles
+- [ ] list_tags_for_resource
+- [X] put_signing_profile
+- [ ] remove_profile_permission
+- [ ] revoke_signature
+- [ ] revoke_signing_profile
+- [ ] start_signing_job
+- [ ] tag_resource
+- [ ] untag_resource
+</details>
+
 ## sns
 <details>
 <summary>55% implemented</summary>
@@ -6370,7 +6393,6 @@
 - servicecatalog-appregistry
 - sesv2
 - shield
-- signer
 - sms
 - sms-voice
 - snow-device-management
diff --git a/docs/docs/services/signer.rst b/docs/docs/services/signer.rst
new file mode 100644
index 000000000..fffac2fae
--- /dev/null
+++ b/docs/docs/services/signer.rst
@@ -0,0 +1,55 @@
+.. _implementedservice_signer:
+
+.. |start-h3| raw:: html
+
+    <h3>
+
+.. |end-h3| raw:: html
+
+    </h3>
+
+======
+signer
+======
+
+.. autoclass:: moto.signer.models.SignerBackend
+
+|start-h3| Example usage |end-h3|
+
+.. sourcecode:: python
+
+            @mock_signer
+            def test_signer_behaviour:
+                boto3.client("signer")
+                ...
+
+
+
+|start-h3| Implemented features for this service |end-h3|
+
+- [ ] add_profile_permission
+- [X] cancel_signing_profile
+- [ ] describe_signing_job
+- [ ] get_signing_platform
+- [X] get_signing_profile
+- [ ] list_profile_permissions
+- [ ] list_signing_jobs
+- [X] list_signing_platforms
+  
+        Pagination is not yet implemented. The parameters category, partner, target are not yet implemented
+        
+
+- [ ] list_signing_profiles
+- [ ] list_tags_for_resource
+- [X] put_signing_profile
+  
+        The following parameters are not yet implemented: SigningMaterial, Overrides, SigningParamaters
+        
+
+- [ ] remove_profile_permission
+- [ ] revoke_signature
+- [ ] revoke_signing_profile
+- [ ] start_signing_job
+- [ ] tag_resource
+- [ ] untag_resource
+
diff --git a/moto/__init__.py b/moto/__init__.py
index c99b6f3b6..6b62b5efb 100644
--- a/moto/__init__.py
+++ b/moto/__init__.py
@@ -137,6 +137,7 @@ mock_sdb = lazy_load(".sdb", "mock_sdb")
 mock_secretsmanager = lazy_load(".secretsmanager", "mock_secretsmanager")
 mock_ses = lazy_load(".ses", "mock_ses")
 mock_servicediscovery = lazy_load(".servicediscovery", "mock_servicediscovery")
+mock_signer = lazy_load(".signer", "mock_signer", boto3_name="signer")
 mock_sns = lazy_load(".sns", "mock_sns")
 mock_sqs = lazy_load(".sqs", "mock_sqs")
 mock_ssm = lazy_load(".ssm", "mock_ssm")
diff --git a/moto/backend_index.py b/moto/backend_index.py
index 975d24440..6b6c934e2 100644
--- a/moto/backend_index.py
+++ b/moto/backend_index.py
@@ -143,6 +143,7 @@ backend_url_patterns = [
     ),
     ("ses", re.compile("https?://email\\.(.+)\\.amazonaws\\.com")),
     ("ses", re.compile("https?://ses\\.(.+)\\.amazonaws\\.com")),
+    ("signer", re.compile("https?://signer\\.(.+)\\.amazonaws\\.com")),
     ("sns", re.compile("https?://sns\\.(.+)\\.amazonaws\\.com")),
     ("sqs", re.compile("https?://(.*\\.)?(queue|sqs)\\.(.*\\.)?amazonaws\\.com")),
     ("ssm", re.compile("https?://ssm\\.(.+)\\.amazonaws\\.com")),
diff --git a/moto/signer/__init__.py b/moto/signer/__init__.py
new file mode 100644
index 000000000..2972ffddf
--- /dev/null
+++ b/moto/signer/__init__.py
@@ -0,0 +1,5 @@
+"""signer module initialization; sets value for base decorator."""
+from .models import signer_backends
+from ..core.models import base_decorator
+
+mock_signer = base_decorator(signer_backends)
diff --git a/moto/signer/exceptions.py b/moto/signer/exceptions.py
new file mode 100644
index 000000000..3d60ba7c8
--- /dev/null
+++ b/moto/signer/exceptions.py
@@ -0,0 +1 @@
+"""Exceptions raised by the signer service."""
diff --git a/moto/signer/models.py b/moto/signer/models.py
new file mode 100644
index 000000000..85d974cb2
--- /dev/null
+++ b/moto/signer/models.py
@@ -0,0 +1,192 @@
+from moto.core import BaseBackend, BaseModel
+from moto.core.utils import BackendDict, get_random_hex
+
+
+class SigningProfile(BaseModel):
+    def __init__(
+        self, account_id, region, name, platform_id, signature_validity_period, tags
+    ):
+        self.name = name
+        self.platform_id = platform_id
+        self.signature_validity_period = signature_validity_period or {
+            "value": 135,
+            "type": "MONTHS",
+        }
+        self.tags = tags
+
+        self.status = "Active"
+        self.arn = f"arn:aws:signer:{region}:{account_id}:/signing-profiles/{name}"
+        self.profile_version = get_random_hex(10)
+        self.profile_version_arn = f"{self.arn}/{self.profile_version}"
+
+    def cancel(self):
+        self.status = "Canceled"
+
+    def to_dict(self, full=True):
+        small = {
+            "arn": self.arn,
+            "profileVersion": self.profile_version,
+            "profileVersionArn": self.profile_version_arn,
+        }
+        if full:
+            small.update(
+                {
+                    "status": self.status,
+                    "profileName": self.name,
+                    "platformId": self.platform_id,
+                    "signatureValidityPeriod": self.signature_validity_period,
+                    "signingMaterial": {},
+                    "platformDisplayName": next(
+                        (
+                            p["displayName"]
+                            for p in SignerBackend.platforms
+                            if p["platformId"] == self.platform_id
+                        ),
+                        None,
+                    ),
+                }
+            )
+            if self.tags:
+                small.update({"tags": self.tags})
+        return small
+
+
+class SignerBackend(BaseBackend):
+    """Implementation of signer APIs."""
+
+    platforms = [
+        {
+            "platformId": "AWSIoTDeviceManagement-SHA256-ECDSA",
+            "displayName": "AWS IoT Device Management SHA256-ECDSA ",
+            "partner": "AWSIoTDeviceManagement",
+            "target": "SHA256-ECDSA",
+            "category": "AWS",
+            "signingConfiguration": {
+                "encryptionAlgorithmOptions": {
+                    "allowedValues": ["ECDSA"],
+                    "defaultValue": "ECDSA",
+                },
+                "hashAlgorithmOptions": {
+                    "allowedValues": ["SHA256"],
+                    "defaultValue": "SHA256",
+                },
+            },
+            "signingImageFormat": {
+                "supportedFormats": ["JSONDetached"],
+                "defaultFormat": "JSONDetached",
+            },
+            "maxSizeInMB": 2048,
+            "revocationSupported": False,
+        },
+        {
+            "platformId": "AWSLambda-SHA384-ECDSA",
+            "displayName": "AWS Lambda",
+            "partner": "AWSLambda",
+            "target": "SHA384-ECDSA",
+            "category": "AWS",
+            "signingConfiguration": {
+                "encryptionAlgorithmOptions": {
+                    "allowedValues": ["ECDSA"],
+                    "defaultValue": "ECDSA",
+                },
+                "hashAlgorithmOptions": {
+                    "allowedValues": ["SHA384"],
+                    "defaultValue": "SHA384",
+                },
+            },
+            "signingImageFormat": {
+                "supportedFormats": ["JSONDetached"],
+                "defaultFormat": "JSONDetached",
+            },
+            "maxSizeInMB": 250,
+            "revocationSupported": True,
+        },
+        {
+            "platformId": "AmazonFreeRTOS-TI-CC3220SF",
+            "displayName": "Amazon FreeRTOS SHA1-RSA CC3220SF-Format",
+            "partner": "AmazonFreeRTOS",
+            "target": "SHA1-RSA-TISHA1",
+            "category": "AWS",
+            "signingConfiguration": {
+                "encryptionAlgorithmOptions": {
+                    "allowedValues": ["RSA"],
+                    "defaultValue": "RSA",
+                },
+                "hashAlgorithmOptions": {
+                    "allowedValues": ["SHA1"],
+                    "defaultValue": "SHA1",
+                },
+            },
+            "signingImageFormat": {
+                "supportedFormats": ["JSONEmbedded"],
+                "defaultFormat": "JSONEmbedded",
+            },
+            "maxSizeInMB": 16,
+            "revocationSupported": False,
+        },
+        {
+            "platformId": "AmazonFreeRTOS-Default",
+            "displayName": "Amazon FreeRTOS SHA256-ECDSA",
+            "partner": "AmazonFreeRTOS",
+            "target": "SHA256-ECDSA",
+            "category": "AWS",
+            "signingConfiguration": {
+                "encryptionAlgorithmOptions": {
+                    "allowedValues": ["ECDSA", "RSA"],
+                    "defaultValue": "ECDSA",
+                },
+                "hashAlgorithmOptions": {
+                    "allowedValues": ["SHA256"],
+                    "defaultValue": "SHA256",
+                },
+            },
+            "signingImageFormat": {
+                "supportedFormats": ["JSONEmbedded"],
+                "defaultFormat": "JSONEmbedded",
+            },
+            "maxSizeInMB": 16,
+            "revocationSupported": False,
+        },
+    ]
+
+    def __init__(self, region_name, account_id):
+        super().__init__(region_name, account_id)
+        self.signing_profiles: [str, SigningProfile] = dict()
+
+    def cancel_signing_profile(self, profile_name) -> None:
+        self.signing_profiles[profile_name].cancel()
+
+    def get_signing_profile(self, profile_name) -> SigningProfile:
+        return self.signing_profiles[profile_name]
+
+    def put_signing_profile(
+        self,
+        profile_name,
+        signature_validity_period,
+        platform_id,
+        tags,
+    ) -> SigningProfile:
+        """
+        The following parameters are not yet implemented: SigningMaterial, Overrides, SigningParamaters
+        """
+        profile = SigningProfile(
+            account_id=self.account_id,
+            region=self.region_name,
+            name=profile_name,
+            platform_id=platform_id,
+            signature_validity_period=signature_validity_period,
+            tags=tags,
+        )
+        self.signing_profiles[profile_name] = profile
+        return profile
+
+    def list_signing_platforms(self):
+        """
+        Pagination is not yet implemented. The parameters category, partner, target are not yet implemented
+        """
+        return SignerBackend.platforms
+
+
+# Using the lambda-regions
+# boto3.Session().get_available_regions("signer") still returns an empty list
+signer_backends: [str, [str, SignerBackend]] = BackendDict(SignerBackend, "lambda")
diff --git a/moto/signer/responses.py b/moto/signer/responses.py
new file mode 100644
index 000000000..ad42aa587
--- /dev/null
+++ b/moto/signer/responses.py
@@ -0,0 +1,43 @@
+"""Handles incoming signer requests, invokes methods, returns responses."""
+import json
+
+from moto.core.responses import BaseResponse
+from .models import signer_backends, SignerBackend
+
+
+class signerResponse(BaseResponse):
+    def __init__(self):
+        super().__init__(service_name="signer")
+
+    @property
+    def signer_backend(self) -> SignerBackend:
+        """Return backend instance specific for this region."""
+        return signer_backends[self.current_account][self.region]
+
+    def cancel_signing_profile(self):
+        profile_name = self.path.split("/")[-1]
+        self.signer_backend.cancel_signing_profile(profile_name=profile_name)
+        return "{}"
+
+    def get_signing_profile(self):
+        profile_name = self.path.split("/")[-1]
+        profile = self.signer_backend.get_signing_profile(profile_name=profile_name)
+        return json.dumps(profile.to_dict())
+
+    def put_signing_profile(self):
+        params = json.loads(self.body)
+        profile_name = self.path.split("/")[-1]
+        signature_validity_period = params.get("signatureValidityPeriod")
+        platform_id = params.get("platformId")
+        tags = params.get("tags")
+        profile = self.signer_backend.put_signing_profile(
+            profile_name=profile_name,
+            signature_validity_period=signature_validity_period,
+            platform_id=platform_id,
+            tags=tags,
+        )
+        return json.dumps(profile.to_dict(full=False))
+
+    def list_signing_platforms(self):
+        platforms = self.signer_backend.list_signing_platforms()
+        return json.dumps(dict(platforms=platforms))
diff --git a/moto/signer/urls.py b/moto/signer/urls.py
new file mode 100644
index 000000000..4b67c84ed
--- /dev/null
+++ b/moto/signer/urls.py
@@ -0,0 +1,15 @@
+"""signer base URL and path."""
+from .responses import signerResponse
+
+url_bases = [
+    r"https?://signer\.(.+)\.amazonaws\.com",
+]
+
+
+response = signerResponse()
+
+
+url_paths = {
+    "{0}/signing-profiles/(?P<profile_name>[^/]+)$": response.dispatch,
+    "{0}/signing-platforms$": response.dispatch,
+}
diff --git a/tests/terraformtests/terraform-tests.success.txt b/tests/terraformtests/terraform-tests.success.txt
index 262ba0f30..3a577cd5d 100644
--- a/tests/terraformtests/terraform-tests.success.txt
+++ b/tests/terraformtests/terraform-tests.success.txt
@@ -207,6 +207,13 @@ servicediscovery:
   - TestAccServiceDiscoveryPrivateDNSNamespace
   - TestAccServiceDiscoveryPublicDNSNamespace
   - TestAccServiceDiscoveryService
+signer:
+ - TestAccSignerSigningProfileDataSource_basic
+ - TestAccSignerSigningProfile_basic
+ - TestAccSignerSigningProfile_generateNameWithNamePrefix
+ - TestAccSignerSigningProfile_generateName
+ - TestAccSignerSigningProfile_tags
+ - TestAccSignerSigningProfile_signatureValidityPeriod
 sns:
   - TestAccSNSTopicPolicy
   - TestAccSNSTopicDataSource
diff --git a/tests/test_signer/__init__.py b/tests/test_signer/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/test_signer/test_signing_platforms.py b/tests/test_signer/test_signing_platforms.py
new file mode 100644
index 000000000..1000be347
--- /dev/null
+++ b/tests/test_signer/test_signing_platforms.py
@@ -0,0 +1,21 @@
+"""Unit tests for signer-supported APIs."""
+import boto3
+
+import sure  # noqa # pylint: disable=unused-import
+from moto import mock_signer
+
+# See our Development Tips on writing tests for hints on how to write good tests:
+# http://docs.getmoto.org/en/latest/docs/contributing/development_tips/tests.html
+
+
+@mock_signer
+def test_list_signing_platforms():
+    client = boto3.client("signer", region_name="us-east-2")
+    resp = client.list_signing_platforms()
+
+    resp.should.have.key("platforms").should.have.length_of(4)
+
+    partners = [x["partner"] for x in resp["platforms"]]
+    set(partners).should.equal(
+        {"AmazonFreeRTOS", "AWSLambda", "AWSIoTDeviceManagement"}
+    )
diff --git a/tests/test_signer/test_signing_profiles.py b/tests/test_signer/test_signing_profiles.py
new file mode 100644
index 000000000..e7d90ab06
--- /dev/null
+++ b/tests/test_signer/test_signing_profiles.py
@@ -0,0 +1,70 @@
+"""Unit tests for signer-supported APIs."""
+import boto3
+
+import sure  # noqa # pylint: disable=unused-import
+from moto import mock_signer
+
+# See our Development Tips on writing tests for hints on how to write good tests:
+# http://docs.getmoto.org/en/latest/docs/contributing/development_tips/tests.html
+
+
+@mock_signer
+def test_put_signing_profile():
+    client = boto3.client("signer", region_name="eu-west-1")
+    resp = client.put_signing_profile(profileName="prof1", platformId="pid")
+
+    resp.should.have.key("arn")
+    resp.should.have.key("profileVersion")
+    resp.should.have.key("profileVersionArn")
+
+
+@mock_signer
+def test_get_signing_profile():
+    client = boto3.client("signer", region_name="eu-west-1")
+    resp = client.put_signing_profile(
+        profileName="prof1", platformId="AWSLambda-SHA384-ECDSA"
+    )
+
+    resp = client.get_signing_profile(profileName="prof1")
+
+    resp.should.have.key("arn")
+    resp.should.have.key("profileVersion")
+    resp.should.have.key("profileVersionArn")
+    resp.should.have.key("status").equals("Active")
+    resp.should.have.key("profileName").equals("prof1")
+    resp.should.have.key("platformId").equals("AWSLambda-SHA384-ECDSA")
+    resp.should.have.key("signatureValidityPeriod").equals(
+        {"type": "MONTHS", "value": 135}
+    )
+
+
+@mock_signer
+def test_get_signing_profile__with_args():
+    client = boto3.client("signer", region_name="eu-west-1")
+    resp = client.put_signing_profile(
+        profileName="prof1",
+        platformId="AWSLambda-SHA384-ECDSA",
+        signatureValidityPeriod={"type": "DAYS", "value": 10},
+        tags={"k1": "v1", "k2": "v2"},
+    )
+
+    resp = client.get_signing_profile(profileName="prof1")
+
+    resp.should.have.key("signatureValidityPeriod").equals(
+        {"type": "DAYS", "value": 10}
+    )
+    resp.should.have.key("tags").equals({"k1": "v1", "k2": "v2"})
+
+
+@mock_signer
+def test_cancel_signing_profile():
+    client = boto3.client("signer", region_name="eu-west-1")
+    resp = client.put_signing_profile(
+        profileName="prof1", platformId="AWSLambda-SHA384-ECDSA"
+    )
+
+    client.cancel_signing_profile(profileName="prof1")
+
+    resp = client.get_signing_profile(profileName="prof1")
+
+    resp.should.have.key("status").equals("Canceled")