diff --git a/app/actions/webmentions/create.rb b/app/actions/webmentions/create.rb
index 978e792..4a68b2d 100644
--- a/app/actions/webmentions/create.rb
+++ b/app/actions/webmentions/create.rb
@@ -4,29 +4,24 @@ module Adamantium
   module Actions
     module Webmentions
       class Create < Adamantium::Action
-
-        include Deps["repos.webmentions_repo", "repos.post_repo"]
+        include Deps["repos.webmentions_repo",
+          "repos.post_repo",
+          webmention_parser: "param_parser.webmention"
+                ]
 
         def handle(req, res)
-          if req.params[:"wm-property"] == "in-reply-to"
-
+          webmention = webmention_parser.call(params: req.params)
+          case webmention
+          in Success[:reply, reply]
             slug = req.params[:"in-reply-to"].split("/").last
             post = post_repo.fetch!(slug)
 
-            attrs = {
-              type: "reply",
-              author_name: req.params[:author][:name],
-              author_photo: req.params[:author][:photo],
-              author_url: req.params[:author][:url],
-              published_at: req.params[:published],
-              content_html: req.params[:content][:html],
-              content_text: req.params[:content][:text],
-              source_url: req.params[:url],
-              target_url: req.params[:"in-reply-to"],
-              post_id: post.id
-            }
+            reply[:post_id] = post.id
 
-            webmentions_repo.create(attrs)
+            webmentions_repo.create(reply)
+            res.status = 201
+          in Failure(:invalid_request)
+            res.status = 429
           end
         end
       end
diff --git a/app/repos/webmentions_repo.rb b/app/repos/webmentions_repo.rb
index 2efc0e8..7f6c9ce 100644
--- a/app/repos/webmentions_repo.rb
+++ b/app/repos/webmentions_repo.rb
@@ -4,4 +4,4 @@ module Adamantium
       commands :create
     end
   end
-end
\ No newline at end of file
+end
diff --git a/config/providers/param_parser.rb b/config/providers/param_parser.rb
index 271bd7a..4e88582 100644
--- a/config/providers/param_parser.rb
+++ b/config/providers/param_parser.rb
@@ -3,5 +3,6 @@
 Hanami.app.register_provider :param_parser, namespace: true do
   start do
     register "micropub_post", Adamantium::MicropubRequestParser.new
+    register "webmention", Adamantium::WebmentionRequestParser.new
   end
 end
diff --git a/lib/adamantium/webmention_request_parser.rb b/lib/adamantium/webmention_request_parser.rb
new file mode 100644
index 0000000..9f93dfe
--- /dev/null
+++ b/lib/adamantium/webmention_request_parser.rb
@@ -0,0 +1,26 @@
+require "dry/monads"
+
+module Adamantium
+  class WebmentionRequestParser
+
+    include Dry::Monads[:result]
+
+    def call(params:)
+      if params[:"wm-property"] == "in-reply-to"
+        Success[:reply, {
+          type: "reply",
+          author_name: params[:author][:name],
+          author_photo: params[:author][:photo],
+          author_url: params[:author][:url],
+          published_at: params[:published],
+          content_html: params[:content][:html],
+          content_text: params[:content][:text],
+          source_url: params[:url],
+          target_url: params[:"in-reply-to"]
+        }]
+      else
+        Failure(:invalid_request)
+      end
+    end
+  end
+end
diff --git a/spec/adamantium/webmention_request_parser_spec.rb b/spec/adamantium/webmention_request_parser_spec.rb
new file mode 100644
index 0000000..93f1b0e
--- /dev/null
+++ b/spec/adamantium/webmention_request_parser_spec.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+#
+RSpec.describe Adamantium::WebmentionRequestParser do
+  include Dry::Monads[:result]
+  subject { described_class.new }
+
+  let(:reply_json) {
+    '{
+      "type": "entry",
+      "author": {
+        "type": "card",
+        "name": "nitza",
+        "photo": "",
+        "url": "https://micro.blog/nitza"
+      },
+      "url": "https://micro.blog/nitza/20554783",
+      "published": "2023-07-05T09:44:41+00:00",
+      "wm-received": "2023-07-05T09:44:48Z",
+      "wm-id": 1692950,
+      "wm-source": "https://micro.blog/nitza/20554783",
+      "wm-target": "https://dnitza.com/post/e413397a-9912-4914-a0d1-3d1c324e014b",
+      "content": {
+        "html": "<p><a href=\"https://micro.blog/example\">@example</a> hah! I thought the same thing — but this is the most affordable thing that Teenage Engineering makes 😅</p>",
+        "text": "@example hah! I thought the same thing — but this is the most affordable thing that Teenage Engineering makes 😅"
+      },
+      "in-reply-to": "https://dnitza.com/post/e413397a-9912-4914-a0d1-3d1c324e014b",
+      "wm-property": "in-reply-to",
+      "wm-private": false
+    }'
+  }
+
+  context "reply" do
+    it "parses a reply" do
+      expect(subject.call(params: JSON.parse(reply_json, symbolize_names: true))).to be_success
+    end
+
+    it "fails to parses a reply" do
+      expect(subject.call(params: JSON.parse("{ }", symbolize_names: true))).to be_failure
+    end
+  end
+end
+
diff --git a/spec/requests/create_webmention_spec.rb b/spec/requests/create_webmention_spec.rb
new file mode 100644
index 0000000..e730d8f
--- /dev/null
+++ b/spec/requests/create_webmention_spec.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+RSpec.describe "Webmention creation", :db, :requests do
+  let(:post_repo) { Adamantium::Repos::PostRepo.new }
+  let(:post_record) { Test::Factory[:post] }
+
+  context "reply" do
+    let(:reply_json) {
+      {
+        "type": "entry",
+        "author": {
+          "type": "card",
+          "name": "nitza",
+          "photo": "",
+          "url": "https://micro.blog/nitza"
+        },
+        "url": "https://micro.blog/nitza/20554783",
+        "published": "2023-07-05T09:44:41+00:00",
+        "wm-received": "2023-07-05T09:44:48Z",
+        "wm-id": 1692950,
+        "wm-source": "https://micro.blog/nitza/20554783",
+        "wm-target": "https://dnitza.com/post/#{post_record.slug}",
+        "content": {
+          "html": "<p><a href=\"https://micro.blog/example\">@example</a> hah! I thought the same thing — but this is the most affordable thing that Teenage Engineering makes 😅</p>",
+          "text": "@example hah! I thought the same thing — but this is the most affordable thing that Teenage Engineering makes 😅"
+        },
+        "in-reply-to": "https://dnitza.com/post/#{post_record.slug}",
+        "wm-property": "in-reply-to",
+        "wm-private": false
+      }
+    }
+
+    it "is successful" do
+      # params = JSON.parse(reply_json, symbolize_names: true)
+
+      post "/micropub/webmentions", reply_json
+
+      expect(last_response).to be_successful
+    end
+  end
+end
\ No newline at end of file