diff --git a/lib/pleroma/web/api_spec/operations/instance_operation.ex b/lib/pleroma/web/api_spec/operations/instance_operation.ex
index bccea7486f..e2f3bf1085 100644
--- a/lib/pleroma/web/api_spec/operations/instance_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/instance_operation.ex
@@ -40,7 +40,7 @@ def rules_operation do
       summary: "Retrieve list of instance rules",
       operationId: "InstanceController.rules",
       responses: %{
-        200 => Operation.response("Array of domains", "application/json", array_of_rules())
+        200 => Operation.response("Array of rules", "application/json", array_of_rules())
       }
     }
   end
diff --git a/lib/pleroma/web/api_spec/operations/mastodon_admin/account_operation.ex b/lib/pleroma/web/api_spec/operations/mastodon_admin/account_operation.ex
index b6d28e7d31..3ca61b5daa 100644
--- a/lib/pleroma/web/api_spec/operations/mastodon_admin/account_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/mastodon_admin/account_operation.ex
@@ -20,7 +20,7 @@ def index_operation do
     %Operation{
       tags: ["User administration"],
       summary: "View accounts by criteria",
-      operationId: "Admin.AccountController.index",
+      operationId: "MastodonAdmin.AccountController.index",
       description: "View accounts matching certain criteria for filtering, up to 100 at a time.",
       security: [%{"oAuth" => ["admin:read:accounts"]}],
       parameters:
@@ -97,7 +97,7 @@ def show_operation do
     %Operation{
       tags: ["User administration"],
       summary: "View a specific account",
-      operationId: "Admin.AccountController.show",
+      operationId: "MastodonAdmin.AccountController.show",
       description: "View admin-level information about the given account.",
       security: [%{"oAuth" => ["admin:read:accounts"]}],
       parameters: [
@@ -115,7 +115,7 @@ def account_action_operation do
     %Operation{
       tags: ["User administration"],
       summary: "Perform an action against an account",
-      operationId: "Admin.AccountController.account_action",
+      operationId: "MastodonAdmin.AccountController.account_action",
       description:
         "Perform an action against an account and log this action in the moderation history.",
       security: [%{"oAuth" => ["admin:write:accounts"]}],
@@ -147,7 +147,7 @@ def delete_operation do
     %Operation{
       tags: ["User administration"],
       summary: "Delete a specific account",
-      operationId: "Admin.AccountController.delete",
+      operationId: "MastodonAdmin.AccountController.delete",
       description: "Delete the given account.",
       security: [%{"oAuth" => ["admin:write:accounts"]}],
       parameters: [
@@ -165,7 +165,7 @@ def enable_operation do
     %Operation{
       tags: ["User administration"],
       summary: "Re-enable account",
-      operationId: "Admin.AccountController.enable",
+      operationId: "MastodonAdmin.AccountController.enable",
       description: "Re-enable a local account whose login is currently disabled.",
       security: [%{"oAuth" => ["admin:write:accounts"]}],
       parameters: [
@@ -183,7 +183,7 @@ def unsensitive_operation do
     %Operation{
       tags: ["User administration"],
       summary: "Unsensitive account",
-      operationId: "Admin.AccountController.unsensitive",
+      operationId: "MastodonAdmin.AccountController.unsensitive",
       description: "Unsensitive a currently sensitized account.",
       security: [%{"oAuth" => ["admin:write:accounts"]}],
       parameters: [
@@ -201,7 +201,7 @@ def unsilence_operation do
     %Operation{
       tags: ["User administration"],
       summary: "Unsilence account",
-      operationId: "Admin.AccountController.unsilence",
+      operationId: "MastodonAdmin.AccountController.unsilence",
       description: "Unsilence a currently silenced account.",
       parameters: [
         Operation.parameter(:id, :path, :string, "ID of the account")
@@ -218,7 +218,7 @@ def unsuspend_operation do
     %Operation{
       tags: ["User administration"],
       summary: "Unsuspend account",
-      operationId: "Admin.AccountController.unsuspend",
+      operationId: "MastodonAdmin.AccountController.unsuspend",
       description: "Unsuspend a currently suspended account.",
       parameters: [
         Operation.parameter(:id, :path, :string, "ID of the account")
@@ -235,7 +235,7 @@ def approve_operation do
     %Operation{
       tags: ["User administration"],
       summary: "Approve pending account",
-      operationId: "Admin.AccountController.approve",
+      operationId: "MastodonAdmin.AccountController.approve",
       description: "Approve the given local account if it is currently pending approval.",
       parameters: [
         Operation.parameter(:id, :path, :string, "ID of the account")
@@ -252,7 +252,7 @@ def reject_operation do
     %Operation{
       tags: ["User administration"],
       summary: "Reject pending account",
-      operationId: "Admin.AccountController.reject",
+      operationId: "MastodonAdmin.AccountController.reject",
       description: "Reject the given local account if it is currently pending approval.",
       parameters: [
         Operation.parameter(:id, :path, :string, "ID of the account")
@@ -266,7 +266,7 @@ def reject_operation do
     }
   end
 
-  defp account do
+  def account do
     %Schema{
       title: "AdminAccount",
       description: "Admin-level information about a given account.",
diff --git a/lib/pleroma/web/api_spec/operations/mastodon_admin/report_operation.ex b/lib/pleroma/web/api_spec/operations/mastodon_admin/report_operation.ex
new file mode 100644
index 0000000000..a89010a4dd
--- /dev/null
+++ b/lib/pleroma/web/api_spec/operations/mastodon_admin/report_operation.ex
@@ -0,0 +1,136 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.MastodonAdmin.ReportOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.MastodonAdmin.AccountOperation
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+  alias Pleroma.Web.ApiSpec.Schemas.FlakeID
+  alias Pleroma.Web.ApiSpec.Schemas.Status
+
+  import Pleroma.Web.ApiSpec.Helpers
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def index_operation do
+    %Operation{
+      tags: ["Report methods"],
+      summary: "View all reports",
+      operationId: "MastodonAdmin.ReportController.index",
+      description:
+        "View all reports. Pagination may be done with HTTP Link header in the response.",
+      security: [%{"oAuth" => ["admin:read:reports"]}],
+      parameters:
+        [
+          Operation.parameter(:resolved, :query, :boolean, "Filter for resolved reports"),
+          Operation.parameter(:account_id, :query, :string, "Filter by author account id"),
+          Operation.parameter(
+            :target_account_id,
+            :query,
+            :string,
+            "Filter by report target account id (not implemented)"
+          )
+        ] ++
+          pagination_params(),
+      responses: %{
+        200 =>
+          Operation.response("Account", "application/json", %Schema{
+            title: "ArrayOfReports",
+            type: :array,
+            items: report()
+          }),
+        401 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def show_operation do
+    %Operation{
+      tags: ["Report methods"],
+      summary: "View a single report",
+      operationId: "MastodonAdmin.ReportController.show",
+      description: "View information about the report with the given ID.",
+      security: [%{"oAuth" => ["admin:read:reports"]}],
+      parameters: [
+        Operation.parameter(:id, :path, :string, "ID of the report")
+      ],
+      responses: %{
+        200 => Operation.response("Account", "application/json", report()),
+        401 => Operation.response("Error", "application/json", ApiError),
+        404 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def resolve_operation do
+    %Operation{
+      tags: ["Report methods"],
+      summary: "Mark as resolved",
+      operationId: "MastodonAdmin.ReportController.resolve",
+      description: "Mark a report as resolved with no further action taken.",
+      security: [%{"oAuth" => ["admin:write:reports"]}],
+      parameters: [
+        Operation.parameter(:id, :path, :string, "ID of the report")
+      ],
+      responses: %{
+        200 => Operation.response("Account", "application/json", report()),
+        400 => Operation.response("Error", "application/json", ApiError),
+        401 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  def reopen_operation do
+    %Operation{
+      tags: ["Report methods"],
+      summary: "Re-open report",
+      operationId: "MastodonAdmin.ReportController.reopen",
+      description: "Reopen a currently closed report.",
+      security: [%{"oAuth" => ["admin:write:reports"]}],
+      parameters: [
+        Operation.parameter(:id, :path, :string, "ID of the report")
+      ],
+      responses: %{
+        200 => Operation.response("Account", "application/json", report()),
+        400 => Operation.response("Error", "application/json", ApiError),
+        401 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
+  defp report do
+    %Schema{
+      title: "Report",
+      type: :object,
+      properties: %{
+        id: FlakeID,
+        action_taken: %Schema{type: :boolean},
+        category: %Schema{type: :string},
+        comment: %Schema{type: :string},
+        created_at: %Schema{type: :string, format: "date-time"},
+        updated_at: %Schema{type: :string, format: "date-time"},
+        account: AccountOperation.account(),
+        target_account: AccountOperation.account(),
+        statuses: %Schema{
+          type: :array,
+          items: Status
+        },
+        rules: %Schema{
+          type: :array,
+          items: %Schema{
+            type: :object,
+            properties: %{
+              id: %Schema{type: :integer},
+              text: %Schema{type: :string}
+            }
+          }
+        }
+      }
+    }
+  end
+end
diff --git a/lib/pleroma/web/mastodon_api/admin/controllers/report_controller.ex b/lib/pleroma/web/mastodon_api/admin/controllers/report_controller.ex
new file mode 100644
index 0000000000..8099e1c4cf
--- /dev/null
+++ b/lib/pleroma/web/mastodon_api/admin/controllers/report_controller.ex
@@ -0,0 +1,102 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.Admin.ReportController do
+  use Pleroma.Web, :controller
+
+  import Pleroma.Web.ControllerHelper,
+    only: [
+      add_link_headers: 2,
+      json_response: 3
+    ]
+
+  alias Pleroma.Activity
+  alias Pleroma.Pagination
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ActivityPub
+  alias Pleroma.Web.AdminAPI.Report
+  alias Pleroma.Web.CommonAPI
+  alias Pleroma.Web.Plugs.OAuthScopesPlug
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+
+  plug(OAuthScopesPlug, %{scopes: ["admin:read:reports"]} when action in [:index, :show])
+
+  plug(OAuthScopesPlug, %{scopes: ["admin:write:reports"]} when action in [:resolve, :reopen])
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.MastodonAdmin.ReportOperation
+
+  def index(conn, params) do
+    opts =
+      %{}
+      |> Map.put(:type, "Flag")
+      |> Map.put(:skip_preload, true)
+      |> Map.put(:preload_report_notes, true)
+      |> Map.put(:total, true)
+      |> restrict_state(params)
+      |> restrict_actor(params)
+
+    # |> restrict_target(params)
+
+    reports =
+      ActivityPub.fetch_activities_query([], opts)
+      |> Pagination.fetch_paginated(params)
+
+    conn
+    |> add_link_headers(reports)
+    |> render("index.json", reports: reports)
+  end
+
+  def show(conn, %{id: id}) do
+    with %Activity{} = report <- Activity.get_report(id) do
+      render(conn, "show.json", Report.extract_report_info(report))
+    else
+      _ -> {:error, :not_found}
+    end
+  end
+
+  def resolve(conn, %{id: id}) do
+    with {:ok, report} <- CommonAPI.update_report_state(id, "resolved") do
+      render(conn, "show.json", Report.extract_report_info(report))
+    else
+      {:error, error} ->
+        json_response(conn, :bad_request, %{error: error})
+    end
+  end
+
+  def reopen(conn, %{id: id}) do
+    with {:ok, report} <- CommonAPI.update_report_state(id, "open") do
+      render(conn, "show.json", Report.extract_report_info(report))
+    else
+      {:error, error} ->
+        json_response(conn, :bad_request, %{error: error})
+    end
+  end
+
+  defp restrict_state(opts, %{resolved: true}), do: Map.put(opts, :state, "resolved")
+
+  defp restrict_state(opts, %{resolved: false}), do: Map.put(opts, :state, "open")
+
+  defp restrict_state(opts, _params), do: opts
+
+  defp restrict_actor(opts, %{account_id: actor}) do
+    with %User{ap_id: ap_id} <- User.get_by_id(actor) do
+      Map.put(opts, :actor_id, ap_id)
+    else
+      _ -> Map.put(opts, :actor_id, actor)
+    end
+  end
+
+  defp restrict_actor(opts, _params), do: opts
+
+  # defp restrict_target(opts, %{target_account_id: target}) do
+  #   with %User{id: id} <- User.get_by_ap_id(target) do
+  #     Map.put(opts, :user_actor_id, id)
+  #   else
+  #     _ -> Map.put(opts, :user_actor_id, target)
+  #   end
+  # end
+
+  # defp restrict_target(opts, _params), do: opts
+end
diff --git a/lib/pleroma/web/mastodon_api/admin/views/report_view.ex b/lib/pleroma/web/mastodon_api/admin/views/report_view.ex
new file mode 100644
index 0000000000..dbcb3392f3
--- /dev/null
+++ b/lib/pleroma/web/mastodon_api/admin/views/report_view.ex
@@ -0,0 +1,59 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.Admin.ReportView do
+  use Pleroma.Web, :view
+
+  alias Pleroma.HTML
+  alias Pleroma.User
+  alias Pleroma.Web.AdminAPI.Report
+  alias Pleroma.Web.CommonAPI.Utils
+  alias Pleroma.Web.MastodonAPI
+  alias Pleroma.Web.MastodonAPI.Admin.AccountView
+  alias Pleroma.Web.MastodonAPI.InstanceView
+  alias Pleroma.Web.MastodonAPI.StatusView
+
+  def render("index.json", %{reports: reports}) do
+    reports
+    |> Enum.map(&Report.extract_report_info/1)
+    |> Enum.map(&render(__MODULE__, "show.json", &1))
+
+    # |> render_many(__MODULE__, "show.json", as: :report)
+  end
+
+  def render("show.json", %{
+        report: report,
+        user: account,
+        account: target_account,
+        statuses: statuses
+      }) do
+    created_at = Utils.to_masto_date(report.data["published"])
+
+    content =
+      unless is_nil(report.data["content"]) do
+        HTML.filter_tags(report.data["content"])
+      else
+        nil
+      end
+
+    %{
+      id: report.id,
+      action_taken: report.data["state"] != "open",
+      category: "other",
+      comment: content,
+      created_at: created_at,
+      updated_at: created_at,
+      account: AccountView.render("show.json", %{user: account}),
+      target_account: AccountView.render("show.json", %{user: target_account}),
+      assigned_account: nil,
+      action_taken_by_account: nil,
+      statuses:
+        StatusView.render("index.json", %{
+          activities: statuses,
+          as: :activity
+        }),
+      rules: []
+    }
+  end
+end
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index 792c4a8c0f..6587cf4aa5 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -313,6 +313,11 @@ defmodule Pleroma.Web.Router do
     # post("/accounts/:id/unsuspend", AccountController, :unsuspend)
     post("/accounts/:id/approve", AccountController, :approve)
     post("/accounts/:id/reject", AccountController, :reject)
+
+    get("/reports", ReportController, :index)
+    get("/reports/:id", ReportController, :show)
+    post("/reports/:id/resolve", ReportController, :resolve)
+    post("/reports/:id/reopen", ReportController, :reopen)
   end
 
   scope "/api/v1/pleroma/emoji", Pleroma.Web.PleromaAPI do
diff --git a/test/pleroma/web/mastodon_api/admin/controllers/account_controller_test.exs b/test/pleroma/web/mastodon_api/admin/controllers/account_controller_test.exs
index 91a13ef164..c1414059a0 100644
--- a/test/pleroma/web/mastodon_api/admin/controllers/account_controller_test.exs
+++ b/test/pleroma/web/mastodon_api/admin/controllers/account_controller_test.exs
@@ -138,9 +138,10 @@ test "reject account", %{conn: conn} do
     test "do not allow rejecting already accepted accounts", %{conn: conn} do
       %{id: id} = user = insert(:user, is_approved: true)
 
-      assert %{"error" => "User is approved"} == conn
-      |> post("/api/v1/admin/accounts/#{id}/reject")
-      |> json_response_and_validate_schema(400)
+      assert %{"error" => "User is approved"} ==
+               conn
+               |> post("/api/v1/admin/accounts/#{id}/reject")
+               |> json_response_and_validate_schema(400)
 
       user = Repo.reload!(user)