diff --git a/services/cirrus/cirrus.service.js b/services/cirrus/cirrus.service.js
new file mode 100644
index 0000000000..a773d9809d
--- /dev/null
+++ b/services/cirrus/cirrus.service.js
@@ -0,0 +1,84 @@
+'use strict'
+
+const Joi = require('@hapi/joi')
+const { isBuildStatus, renderBuildStatusBadge } = require('../build-status')
+const { BaseJsonService } = require('..')
+
+const schema = Joi.object({
+  subject: Joi.string().required(),
+  status: Joi.alternatives()
+    .try(isBuildStatus, Joi.equal('unknown'))
+    .required(),
+}).required()
+const queryParamSchema = Joi.object({
+  task: Joi.string(),
+  script: Joi.string(),
+}).required()
+
+module.exports = class Cirrus extends BaseJsonService {
+  static get category() {
+    return 'build'
+  }
+
+  static get route() {
+    return {
+      base: 'cirrus',
+      pattern: 'github/:user/:repo/:branch*',
+      queryParamSchema,
+    }
+  }
+
+  static get examples() {
+    return [
+      {
+        title: 'Cirrus CI - Base Branch Build Status',
+        namedParams: { user: 'flutter', repo: 'flutter' },
+        pattern: 'github/:user/:repo',
+        queryParams: { task: 'analyze', script: 'test' },
+        staticPreview: this.render({ status: 'passing' }),
+      },
+      {
+        title: 'Cirrus CI - Specific Branch Build Status',
+        pattern: 'github/:user/:repo/:branch',
+        namedParams: { user: 'flutter', repo: 'flutter', branch: 'master' },
+        queryParams: { task: 'analyze', script: 'test' },
+        staticPreview: this.render({ status: 'passing' }),
+      },
+      {
+        title: 'Cirrus CI - Specific Task Build Status',
+        pattern: 'github/:user/:repo',
+        queryParams: { task: 'analyze' },
+        namedParams: { user: 'flutter', repo: 'flutter' },
+        staticPreview: this.render({ subject: 'analyze', status: 'passing' }),
+      },
+      {
+        title: 'Cirrus CI - Task and Script Build Status',
+        pattern: 'github/:user/:repo',
+        queryParams: { task: 'analyze', script: 'test' },
+        namedParams: {
+          user: 'flutter',
+          repo: 'flutter',
+        },
+        staticPreview: this.render({ subject: 'test', status: 'passing' }),
+      },
+    ]
+  }
+
+  static get defaultBadgeData() {
+    return { label: 'build' }
+  }
+
+  static render({ subject, status }) {
+    return renderBuildStatusBadge({ label: subject, status })
+  }
+
+  async handle({ user, repo, branch }, { script, task }) {
+    const json = await this._requestJson({
+      schema,
+      url: `https://api.cirrus-ci.com/github/${user}/${repo}.json`,
+      options: { qs: { branch, script, task } },
+    })
+
+    return this.constructor.render(json)
+  }
+}
diff --git a/services/cirrus/cirrus.tester.js b/services/cirrus/cirrus.tester.js
new file mode 100644
index 0000000000..a23d9cc8ce
--- /dev/null
+++ b/services/cirrus/cirrus.tester.js
@@ -0,0 +1,16 @@
+'use strict'
+
+const Joi = require('joi')
+const { isBuildStatus } = require('../build-status')
+const t = (module.exports = require('../tester').createServiceTester())
+
+t.create('cirrus bad repo')
+  .get('/github/unknown-identifier/unknown-repo.json')
+  .expectBadge({ label: 'build', message: 'unknown' })
+
+t.create('cirrus fully.valid')
+  .get('/github/flutter/flutter.json')
+  .expectBadge({
+    label: 'build',
+    message: Joi.alternatives().try(isBuildStatus, Joi.equal('unknown')),
+  })