diff --git a/CHANGELOG.md b/CHANGELOG.md
index e7ff47b..ef6324d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 For a full diff see [`1.6.0...main`][1.6.0...main].
 
+### Added
+
+- Added composite actions `oh-dear/check/request-run` for requesting a check run on [ohdear.app](https://ohdear.app) ([#124]), by [@localheinz]
+
 ## [`1.6.0`][1.6.0]
 
 For a full diff see [`1.5.1...1.6.0`][1.5.1...1.6.0].
@@ -154,5 +158,6 @@ For a full diff see [`1.0.0...main`][1.0.0...main].
 [#87]: https://github.com/ergebnis/.github/pull/87
 [#96]: https://github.com/ergebnis/.github/pull/96
 [#123]: https://github.com/ergebnis/.github/pull/123
+[#124]: https://github.com/ergebnis/.github/pull/124
 
 [@localheinz]: https://github.com/localheinz
diff --git a/README.md b/README.md
index 68bd4b1..f47c5c4 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,7 @@ This repository provides the following composite actions:
 - [`ergebnis/.github/actions/github/pull-request/merge`](#github-pull-request-merge)
 - [`ergebnis/.github/actions/github/pull-request/request-review`](#github-pull-request-review)
 - [`ergebnis/.github/actions/github/release/create`](#github-release-create)
+- [`ergebnis/.github/actions/oh-dear/check/request-run`](#oh-dear-check-request-run)
 - [`ergebnis/.github/actions/oh-dear/maintenance-period/start`](#oh-dear-maintenance-period-start)
 - [`ergebnis/.github/actions/oh-dear/maintenance-period/stop`](#oh-dear-maintenance-period-stop)
 
@@ -516,6 +517,52 @@ none
 
 A release is created by the user who owns the GitHub token specified with the `github-token` input.
 
+### <a name="oh-dear-check-request-run"> `ergebnis/.github/actions/oh-dear/check/request-run`
+
+This action requests a [check](https://ohdear.app/docs/general/checks) run on [Oh Dear!](https://ohdear.app).
+
+```yaml
+name: "Deploy"
+
+on:
+  push:
+    branches:
+      - "main"
+
+jobs:
+  deploy:
+    name: "Deploy"
+
+    runs-on: "ubuntu-latest"
+
+    steps:
+    - name: "Checkout"
+      uses: "actions/checkout@v3.0.2"
+      with:
+          fetch-depth: 50
+
+    - name: "Request broken links check on ohdear.app"
+      uses: "ergebnis/.github/actions/oh-dear/maintenance-period/start@1.7.0"
+      with:
+        oh-dear-api-token: "${{ secrets.OH_DEAR_API_TOKEN }}"
+        oh-dear-check-id: "${{ secrets.OH_DEAR_BROKEN_LINKS_CHECK_ID }}"
+```
+
+For details, see [`actions/oh-dear/check/request-run/action.yaml`](actions/oh-dear/check/request-run/action.yaml).
+
+#### Inputs
+
+- `oh-dear-api-token`, required: The Oh Dear API token of a user with permission to request a check run
+- `oh-dear-check-id`, required: Check identifer of an Oh Dear check for which to request a run
+
+#### Outputs
+
+none
+
+#### Side Effects
+
+A check run is requested by the user who owns the Oh Dear API token specified with the `oh-dear-api-token` input for the check identified by the `oh-dear-check-id` input.
+
 ### <a name="oh-dear-maintenance-period-start"> `ergebnis/.github/actions/oh-dear/maintenance-period/start`
 
 This action starts a [maintenance period](https://ohdear.app/docs/general/maintenance-windows) on [Oh Dear!](https://ohdear.app).
diff --git a/actions/oh-dear/check/request-run/action.yaml b/actions/oh-dear/check/request-run/action.yaml
new file mode 100644
index 0000000..7ad7509
--- /dev/null
+++ b/actions/oh-dear/check/request-run/action.yaml
@@ -0,0 +1,28 @@
+# https://docs.github.com/en/actions/creating-actions/creating-a-composite-action
+# https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#inputs
+# https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#runs-for-composite-run-steps-actions
+# https://ohdear.app/docs/integrations/api/checks#enable-amp-disable-a-check
+
+name: "Request a check run"
+
+description: "Request a check run"
+
+inputs:
+  oh-dear-api-token:
+    description: "Oh Dear API token of a user with permission to request a check run"
+    required: true
+  oh-dear-check-id:
+    description: "Check identifer of an Oh Dear check for which to request a run"
+    required: true
+
+runs:
+  using: "composite"
+
+  steps:
+    - name: "Request a check run on ohdear.app"
+      run: |
+        curl -X POST "https://ohdear.app/api/checks/${{ inputs.oh-dear-check-id }}/request-run" \
+          -H "Authorization: Bearer ${{ inputs.oh-dear-api-token }}" \
+          -H "Accept: application/json" \
+          -H "Content-Type: application/json"
+      shell: "bash"