API support for setting the allowed HTTP methods for making ping requests

CHANGELOG.md

@@ -11,6 +11,7 @@ All notable changes to this project will be documented in this file.
 - Host a read-only dashboard (from github.com/healthchecks/dashboard/)
 - LINE Notify integration (#412)
 - Read-only team members
+- API support for setting the allowed HTTP methods for making ping requests
 
 ## Bug Fixes
 - Handle excessively long email addresses in the signup form

hc/api/models.py

@@ -225,6 +225,7 @@ class Check(models.Model):
             "last_ping": isostring(self.last_ping),
             "next_ping": isostring(self.get_grace_start()),
             "manual_resume": self.manual_resume,
+            "methods": self.methods,
         }
 
         if self.last_duration:

hc/api/schemas.py

@@ -10,6 +10,7 @@ check = {
         "tz": {"type": "string", "format": "timezone", "maxLength": 36},
         "channels": {"type": "string"},
         "manual_resume": {"type": "boolean"},
+        "methods": {"enum": ["", "POST"]},
         "unique": {
             "type": "array",
             "items": {"enum": ["name", "tags", "timeout", "grace"]},

hc/api/tests/test_create_check.py

@@ -40,6 +40,7 @@ class CreateCheckTestCase(BaseTestCase):
         self.assertEqual(doc["tags"], "bar,baz")
         self.assertEqual(doc["last_ping"], None)
         self.assertEqual(doc["n_pings"], 0)
+        self.assertEqual(doc["methods"], "")
 
         self.assertTrue("schedule" not in doc)
         self.assertTrue("tz" not in doc)
@@ -47,6 +48,7 @@ class CreateCheckTestCase(BaseTestCase):
         check = Check.objects.get()
         self.assertEqual(check.name, "Foo")
         self.assertEqual(check.tags, "bar,baz")
+        self.assertEqual(check.methods, "")
         self.assertEqual(check.timeout.total_seconds(), 3600)
         self.assertEqual(check.grace.total_seconds(), 60)
         self.assertEqual(check.project, self.project)
@@ -243,3 +245,14 @@ class CreateCheckTestCase(BaseTestCase):
         r = self.post({"api_key": "X" * 32, "manual_resume": "surprise"})
 
         self.assertEqual(r.status_code, 400)
+
+    def test_it_sets_methods(self):
+        r = self.post({"api_key": "X" * 32, "methods": "POST"})
+
+        self.assertEqual(r.status_code, 201)
+        check = Check.objects.get()
+        self.assertEqual(check.methods, "POST")
+
+    def test_it_rejects_bad_methods_value(self):
+        r = self.post({"api_key": "X" * 32, "methods": "bad-value"})
+        self.assertEqual(r.status_code, 400)

hc/api/tests/test_get_check.py

@@ -33,7 +33,7 @@ class GetCheckTestCase(BaseTestCase):
         self.assertEqual(r["Access-Control-Allow-Origin"], "*")
 
         doc = r.json()
-        self.assertEqual(len(doc), 14)
+        self.assertEqual(len(doc), 15)
 
         self.assertEqual(doc["timeout"], 3600)
         self.assertEqual(doc["grace"], 900)
@@ -44,6 +44,7 @@ class GetCheckTestCase(BaseTestCase):
         self.assertEqual(doc["channels"], str(self.c1.code))
         self.assertEqual(doc["desc"], "This is description")
         self.assertFalse(doc["manual_resume"])
+        self.assertEqual(doc["methods"], "")
 
     def test_it_handles_invalid_uuid(self):
         r = self.get("not-an-uuid")
@@ -60,7 +61,7 @@ class GetCheckTestCase(BaseTestCase):
         self.assertEqual(r["Access-Control-Allow-Origin"], "*")
 
         doc = r.json()
-        self.assertEqual(len(doc), 14)
+        self.assertEqual(len(doc), 15)
 
         self.assertEqual(doc["timeout"], 3600)
         self.assertEqual(doc["grace"], 900)

hc/api/tests/test_update_check.py

@@ -242,3 +242,36 @@ class UpdateCheckTestCase(BaseTestCase):
 
         self.check.refresh_from_db()
         self.assertFalse(self.check.manual_resume)
+
+    def test_it_sets_methods(self):
+        r = self.post(self.check.code, {"api_key": "X" * 32, "methods": "POST"})
+        self.assertEqual(r.status_code, 200)
+
+        self.check.refresh_from_db()
+        self.assertEqual(self.check.methods, "POST")
+
+    def test_it_clears_methods(self):
+        self.check.methods = "POST"
+        self.check.save()
+
+        # Client supplies an empty string: we should save it
+        r = self.post(self.check.code, {"api_key": "X" * 32, "methods": ""})
+        self.assertEqual(r.status_code, 200)
+
+        self.check.refresh_from_db()
+        self.assertEqual(self.check.methods, "")
+
+    def test_it_leaves_methods_unchanged(self):
+        self.check.methods = "POST"
+        self.check.save()
+
+        # Client omits the methods key: we should leave it unchanged
+        r = self.post(self.check.code, {"api_key": "X" * 32})
+        self.assertEqual(r.status_code, 200)
+
+        self.check.refresh_from_db()
+        self.assertEqual(self.check.methods, "POST")
+
+    def test_it_rejects_bad_methods_value(self):
+        r = self.post(self.check.code, {"api_key": "X" * 32, "methods": "bad-value"})
+        self.assertEqual(r.status_code, 400)

hc/api/views.py

@@ -98,6 +98,9 @@ def _update(check, spec):
     if "manual_resume" in spec:
         check.manual_resume = spec["manual_resume"]
 
+    if "methods" in spec:
+        check.methods = spec["methods"]
+
     if "timeout" in spec and "schedule" not in spec:
         check.kind = "simple"
         check.timeout = td(seconds=spec["timeout"])

templates/docs/api.html

@@ -120,6 +120,7 @@ specified value.</p>
       <span class="nt">&quot;last_ping&quot;</span><span class="p">:</span> <span class="s2">&quot;2020-03-24T14:02:03+00:00&quot;</span><span class="p">,</span>
       <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="s2">&quot;2020-03-24T15:02:03+00:00&quot;</span><span class="p">,</span>
       <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+      <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
       <span class="nt">&quot;ping_url&quot;</span><span class="p">:</span> <span class="s2">&quot;PING_ENDPOINT31365bce-8da9-4729-8ff3-aaa71d56b712&quot;</span><span class="p">,</span>
       <span class="nt">&quot;update_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/31365bce-8da9-4729-8ff3-aaa71d56b712&quot;</span><span class="p">,</span>
       <span class="nt">&quot;pause_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/31365bce-8da9-4729-8ff3-aaa71d56b712/pause&quot;</span><span class="p">,</span>
@@ -136,6 +137,7 @@ specified value.</p>
       <span class="nt">&quot;last_ping&quot;</span><span class="p">:</span> <span class="s2">&quot;2020-03-23T10:19:32+00:00&quot;</span><span class="p">,</span>
       <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="kc">null</span><span class="p">,</span>
       <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+      <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
       <span class="nt">&quot;ping_url&quot;</span><span class="p">:</span> <span class="s2">&quot;PING_ENDPOINT803f680d-e89b-492b-82ef-2be7b774a92d&quot;</span><span class="p">,</span>
       <span class="nt">&quot;update_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/803f680d-e89b-492b-82ef-2be7b774a92d&quot;</span><span class="p">,</span>
       <span class="nt">&quot;pause_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/803f680d-e89b-492b-82ef-2be7b774a92d/pause&quot;</span><span class="p">,</span>
@@ -166,6 +168,7 @@ and <a href="#list-flips">Get a list of check's status changes</a> API calls.</p
       <span class="nt">&quot;last_ping&quot;</span><span class="p">:</span> <span class="s2">&quot;2020-03-24T14:02:03+00:00&quot;</span><span class="p">,</span>
       <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="s2">&quot;2020-03-24T15:02:03+00:00&quot;</span><span class="p">,</span>
       <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+      <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
       <span class="nt">&quot;unique_key&quot;</span><span class="p">:</span> <span class="s2">&quot;a6c7b0a8a66bed0df66abfdab3c77736861703ee&quot;</span><span class="p">,</span>
       <span class="nt">&quot;timeout&quot;</span><span class="p">:</span> <span class="mi">3600</span>
     <span class="p">},</span>
@@ -179,6 +182,7 @@ and <a href="#list-flips">Get a list of check's status changes</a> API calls.</p
       <span class="nt">&quot;last_ping&quot;</span><span class="p">:</span> <span class="s2">&quot;2020-03-23T10:19:32+00:00&quot;</span><span class="p">,</span>
       <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="kc">null</span><span class="p">,</span>
       <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+      <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
       <span class="nt">&quot;unique_key&quot;</span><span class="p">:</span> <span class="s2">&quot;124f983e0e3dcaeba921cfcef46efd084576e783&quot;</span><span class="p">,</span>
       <span class="nt">&quot;schedule&quot;</span><span class="p">:</span> <span class="s2">&quot;15 5 * * *&quot;</span><span class="p">,</span>
       <span class="nt">&quot;tz&quot;</span><span class="p">:</span> <span class="s2">&quot;UTC&quot;</span>
@@ -221,6 +225,7 @@ using the read-only API key) as an identifier.</p>
   <span class="nt">&quot;last_ping&quot;</span><span class="p">:</span> <span class="s2">&quot;2020-03-23T10:19:32+00:00&quot;</span><span class="p">,</span>
   <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="kc">null</span><span class="p">,</span>
   <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+  <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
   <span class="nt">&quot;ping_url&quot;</span><span class="p">:</span> <span class="s2">&quot;PING_ENDPOINT803f680d-e89b-492b-82ef-2be7b774a92d&quot;</span><span class="p">,</span>
   <span class="nt">&quot;update_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/803f680d-e89b-492b-82ef-2be7b774a92d&quot;</span><span class="p">,</span>
   <span class="nt">&quot;pause_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/803f680d-e89b-492b-82ef-2be7b774a92d/pause&quot;</span><span class="p">,</span>
@@ -248,6 +253,7 @@ check's unique UUID.</p>
   <span class="nt">&quot;last_ping&quot;</span><span class="p">:</span> <span class="s2">&quot;2020-03-23T10:19:32+00:00&quot;</span><span class="p">,</span>
   <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="kc">null</span><span class="p">,</span>
   <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+  <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
   <span class="nt">&quot;unique_key&quot;</span><span class="p">:</span> <span class="s2">&quot;124f983e0e3dcaeba921cfcef46efd084576e783&quot;</span><span class="p">,</span>
   <span class="nt">&quot;schedule&quot;</span><span class="p">:</span> <span class="s2">&quot;15 5 * * *&quot;</span><span class="p">,</span>
   <span class="nt">&quot;tz&quot;</span><span class="p">:</span> <span class="s2">&quot;UTC&quot;</span>
@@ -282,7 +288,7 @@ Example:</p>
 <dt>desc</dt>
 <dd>
 <p>string, optional.</p>
-<p>Description for the check.</p>
+<p>Description of the check.</p>
 </dd>
 <dt>timeout</dt>
 <dd>
@@ -300,7 +306,7 @@ Example:</p>
 </dd>
 <dt>schedule</dt>
 <dd>
-<p>string, optional, default value: "<em> * </em> * *".</p>
+<p>string, optional, default value: "<code>* * * * *</code>".</p>
 <p>A cron expression defining this check's schedule.</p>
 <p>If you specify both <code>timeout</code> and <code>schedule</code> parameters,
 SITE_NAME will create a Cron check and ignore
@@ -311,7 +317,7 @@ the <code>timeout</code> value.</p>
 <dt>tz</dt>
 <dd>
 <p>string, optional, default value: "UTC".</p>
-<p>Server's timezone. This setting only has effect in combination with the
+<p>Server's timezone. This setting only has an effect in combination with the
 <code>schedule</code> parameter.</p>
 <p>Example:</p>
 <p><pre>{"tz": "Europe/Riga"}</pre></p>
@@ -324,6 +330,17 @@ or not. If set to false, a paused check will leave the paused state when it rece
 a ping. If set to true, a paused check will ignore pings and stay paused until
 you manually resume it from the web dashboard.</p>
 </dd>
+<dt>methods</dt>
+<dd>
+<p>string, optional, default value: "".</p>
+<p>Specifies the allowed HTTP methods for making ping requests.
+Must be one of the two values: "" (an empty string) or "POST".</p>
+<p>Set this field to "" (an empty string) to allow HEAD, GET,
+and POST requests.</p>
+<p>Set this field to "POST" to allow only POST requests.</p>
+<p>Example:</p>
+<p><pre>{"methods": "POST"}</pre></p>
+</dd>
 <dt>channels</dt>
 <dd>
 <p>string, optional</p>
@@ -340,11 +357,11 @@ API call to look up the available integration identifiers.</p>
 <p>array of string values, optional, default value: [].</p>
 <p>Enables "upsert" functionality. Before creating a check, SITE_NAME looks for
 existing checks, filtered by fields listed in <code>unique</code>.</p>
-<p>If no matching check is found, SITE_NAME creates a new check and returns it
+<p>If SITE_NAME does not find a matching check, it creates a new check and returns it
 with the HTTP status code 201.</p>
-<p>If a matching check <em>is</em> found, SITE_NAME will update it
+<p>If SITE_NAME finds a matching check, it updates the existing check and
-and return it with HTTP status code 200.</p>
+and returns it with HTTP status code 200.</p>
-<p>The accepted values for the <code>unique</code> field are:
+<p>The accepted values for the <code>unique</code> field are
 <code>name</code>, <code>tags</code>, <code>timeout</code> and <code>grace</code>.</p>
 <p>Example:</p>
 <p><pre>{"name": "Backups", unique: ["name"]}</pre></p>
@@ -364,7 +381,7 @@ field values.</dd>
 <dt>401 Unauthorized</dt>
 <dd>The API key is either missing or invalid.</dd>
 <dt>403 Forbidden</dt>
-<dd>The account's check limit has been reached. For free accounts,
+<dd>The account has hit its check limit. For free accounts,
 the limit is 20 checks per account.</dd>
 </dl>
 <h3>Example Request</h3>
@@ -390,6 +407,7 @@ the limit is 20 checks per account.</dd>
   <span class="nt">&quot;name&quot;</span><span class="p">:</span> <span class="s2">&quot;Backups&quot;</span><span class="p">,</span>
   <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="kc">null</span><span class="p">,</span>
   <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+  <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
   <span class="nt">&quot;pause_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pause&quot;</span><span class="p">,</span>
   <span class="nt">&quot;ping_url&quot;</span><span class="p">:</span> <span class="s2">&quot;PING_ENDPOINTf618072a-7bde-4eee-af63-71a77c5723bc&quot;</span><span class="p">,</span>
   <span class="nt">&quot;status&quot;</span><span class="p">:</span> <span class="s2">&quot;new&quot;</span><span class="p">,</span>
@@ -402,9 +420,8 @@ the limit is 20 checks per account.</dd>
 
 <h2 class="rule" id="update-check">Update an Existing Check</h2>
 <p><code>POST SITE_ROOT/api/v1/checks/&lt;uuid&gt;</code></p>
-<p>Updates an existing check. All request parameters are optional. The check is
+<p>Updates an existing check. All request parameters are optional. If you omit  any
-updated only with the supplied request parameters. If any parameter is omitted,
+parameter, SITE_NAME will leave its value unchanged.</p>
-its value is left unchanged.</p>
 <h3>Request Parameters</h3>
 <dl>
 <dt>name</dt>
@@ -422,7 +439,7 @@ its value is left unchanged.</p>
 <dt>desc</dt>
 <dd>
 <p>string, optional.</p>
-<p>Description for the check.</p>
+<p>Description of the check.</p>
 </dd>
 <dt>timeout</dt>
 <dd>
@@ -442,15 +459,16 @@ its value is left unchanged.</p>
 <dd>
 <p>string, optional.</p>
 <p>A cron expression defining this check's schedule.</p>
-<p>If you specify both "timeout" and "schedule" parameters, "timeout" will be
+<p>If you specify both <code>timeout</code> and <code>schedule</code> parameters,
-ignored and "schedule" will be used.</p>
+SITE_NAME will save the <code>schedule</code> parameter and ignore
+the <code>timeout</code>.</p>
 <p>Example for a check running every half-hour:</p>
 <p><pre>{"schedule": "0,30 * <em> * </em>"}</pre></p>
 </dd>
 <dt>tz</dt>
 <dd>
 <p>string, optional.</p>
-<p>Server's timezone. This setting only has effect in combination with the
+<p>Server's timezone. This setting only has an effect in combination with the
 "schedule" parameter.</p>
 <p>Example:</p>
 <p><pre>{"tz": "Europe/Riga"}</pre></p>
@@ -458,11 +476,21 @@ ignored and "schedule" will be used.</p>
 <dt>manual_resume</dt>
 <dd>
 <p>boolean, optional, default value: false.</p>
-<p>Controls whether a paused ping resumes automatically when pinged (the default),
+<p>Controls whether a paused ping automatically resumes when pinged (the default),
 or not. If set to false, a paused check will leave the paused state when it receives
-a ping. If set to true, a paused check will ignore pings and stay paused until it is
+a ping. If set to true, a paused check will ignore pings and stay paused until
-either manually resumed from the web dashboard or the <code>manual_resume</code> flag is
+you manually resume it from the web dashboard.</p>
-changed.</p>
+</dd>
+<dt>methods</dt>
+<dd>
+<p>string, optional, default value: "".</p>
+<p>Specifies the allowed HTTP methods for making ping requests.
+Must be one of the two values: "" (an empty string) or "POST".</p>
+<p>Set this field to "" (an empty string) to allow HEAD, GET,
+and POST requests.</p>
+<p>Set this field to "POST" to allow only POST requests.</p>
+<p>Example:</p>
+<p><pre>{"methods": "POST"}</pre></p>
 </dd>
 <dt>channels</dt>
 <dd>
@@ -514,6 +542,7 @@ field values.</dd>
   <span class="nt">&quot;name&quot;</span><span class="p">:</span> <span class="s2">&quot;Backups&quot;</span><span class="p">,</span>
   <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="kc">null</span><span class="p">,</span>
   <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+  <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
   <span class="nt">&quot;pause_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pause&quot;</span><span class="p">,</span>
   <span class="nt">&quot;ping_url&quot;</span><span class="p">:</span> <span class="s2">&quot;PING_ENDPOINTf618072a-7bde-4eee-af63-71a77c5723bc&quot;</span><span class="p">,</span>
   <span class="nt">&quot;status&quot;</span><span class="p">:</span> <span class="s2">&quot;new&quot;</span><span class="p">,</span>
@@ -559,6 +588,7 @@ header is sometimes required by some network proxies and web servers.</p>
   <span class="nt">&quot;name&quot;</span><span class="p">:</span> <span class="s2">&quot;Backups&quot;</span><span class="p">,</span>
   <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="kc">null</span><span class="p">,</span>
   <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+  <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
   <span class="nt">&quot;pause_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pause&quot;</span><span class="p">,</span>
   <span class="nt">&quot;ping_url&quot;</span><span class="p">:</span> <span class="s2">&quot;PING_ENDPOINTf618072a-7bde-4eee-af63-71a77c5723bc&quot;</span><span class="p">,</span>
   <span class="nt">&quot;status&quot;</span><span class="p">:</span> <span class="s2">&quot;paused&quot;</span><span class="p">,</span>
@@ -601,6 +631,7 @@ check that was just deleted.</p>
   <span class="nt">&quot;name&quot;</span><span class="p">:</span> <span class="s2">&quot;Backups&quot;</span><span class="p">,</span>
   <span class="nt">&quot;next_ping&quot;</span><span class="p">:</span> <span class="kc">null</span><span class="p">,</span>
   <span class="nt">&quot;manual_resume&quot;</span><span class="p">:</span> <span class="kc">false</span><span class="p">,</span>
+  <span class="nt">&quot;methods&quot;</span><span class="p">:</span> <span class="s2">&quot;&quot;</span><span class="p">,</span>
   <span class="nt">&quot;pause_url&quot;</span><span class="p">:</span> <span class="s2">&quot;SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pause&quot;</span><span class="p">,</span>
   <span class="nt">&quot;ping_url&quot;</span><span class="p">:</span> <span class="s2">&quot;PING_ENDPOINTf618072a-7bde-4eee-af63-71a77c5723bc&quot;</span><span class="p">,</span>
   <span class="nt">&quot;status&quot;</span><span class="p">:</span> <span class="s2">&quot;new&quot;</span><span class="p">,</span>

templates/docs/api.md

@@ -103,6 +103,7 @@ curl --header "X-Api-Key: your-api-key" SITE_ROOT/api/v1/checks/
       "last_ping": "2020-03-24T14:02:03+00:00",
       "next_ping": "2020-03-24T15:02:03+00:00",
       "manual_resume": false,
+      "methods": "",
       "ping_url": "PING_ENDPOINT31365bce-8da9-4729-8ff3-aaa71d56b712",
       "update_url": "SITE_ROOT/api/v1/checks/31365bce-8da9-4729-8ff3-aaa71d56b712",
       "pause_url": "SITE_ROOT/api/v1/checks/31365bce-8da9-4729-8ff3-aaa71d56b712/pause",
@@ -119,6 +120,7 @@ curl --header "X-Api-Key: your-api-key" SITE_ROOT/api/v1/checks/
       "last_ping": "2020-03-23T10:19:32+00:00",
       "next_ping": null,
       "manual_resume": false,
+      "methods": "",
       "ping_url": "PING_ENDPOINT803f680d-e89b-492b-82ef-2be7b774a92d",
       "update_url": "SITE_ROOT/api/v1/checks/803f680d-e89b-492b-82ef-2be7b774a92d",
       "pause_url": "SITE_ROOT/api/v1/checks/803f680d-e89b-492b-82ef-2be7b774a92d/pause",
@@ -151,6 +153,7 @@ Example:
       "last_ping": "2020-03-24T14:02:03+00:00",
       "next_ping": "2020-03-24T15:02:03+00:00",
       "manual_resume": false,
+      "methods": "",
       "unique_key": "a6c7b0a8a66bed0df66abfdab3c77736861703ee",
       "timeout": 3600
     },
@@ -164,6 +167,7 @@ Example:
       "last_ping": "2020-03-23T10:19:32+00:00",
       "next_ping": null,
       "manual_resume": false,
+      "methods": "",
       "unique_key": "124f983e0e3dcaeba921cfcef46efd084576e783",
       "schedule": "15 5 * * *",
       "tz": "UTC"
@@ -214,6 +218,7 @@ curl --header "X-Api-Key: your-api-key" SITE_ROOT/api/v1/checks/<uuid>
   "last_ping": "2020-03-23T10:19:32+00:00",
   "next_ping": null,
   "manual_resume": false,
+  "methods": "",
   "ping_url": "PING_ENDPOINT803f680d-e89b-492b-82ef-2be7b774a92d",
   "update_url": "SITE_ROOT/api/v1/checks/803f680d-e89b-492b-82ef-2be7b774a92d",
   "pause_url": "SITE_ROOT/api/v1/checks/803f680d-e89b-492b-82ef-2be7b774a92d/pause",
@@ -244,6 +249,7 @@ check's unique UUID.
   "last_ping": "2020-03-23T10:19:32+00:00",
   "next_ping": null,
   "manual_resume": false,
+  "methods": "",
   "unique_key": "124f983e0e3dcaeba921cfcef46efd084576e783",
   "schedule": "15 5 * * *",
   "tz": "UTC"
@@ -281,7 +287,7 @@ tags
 desc
 :   string, optional.
 
-    Description for the check.
+    Description of the check.
 
 timeout
 :   number, optional, default value: {{ default_timeout }}.
@@ -302,7 +308,7 @@ grace
     Minimum: 60 (one minute), maximum: 2592000 (30 days).
 
 schedule
-:   string, optional, default value: "* * * * *".
+:   string, optional, default value: "`* * * * *`".
 
     A cron expression defining this check's schedule.
 
@@ -317,7 +323,7 @@ schedule
 tz
 :   string, optional, default value: "UTC".
 
-    Server's timezone. This setting only has effect in combination with the
+    Server's timezone. This setting only has an effect in combination with the
     `schedule` parameter.
 
     Example:
@@ -332,6 +338,21 @@ manual_resume
     a ping. If set to true, a paused check will ignore pings and stay paused until
     you manually resume it from the web dashboard.
 
+methods
+:   string, optional, default value: "".
+
+    Specifies the allowed HTTP methods for making ping requests.
+    Must be one of the two values: "" (an empty string) or "POST".
+
+    Set this field to "" (an empty string) to allow HEAD, GET,
+    and POST requests.
+
+    Set this field to "POST" to allow only POST requests.
+
+    Example:
+
+    <pre>{"methods": "POST"}</pre>
+
 channels
 :   string, optional
 
@@ -351,13 +372,13 @@ unique
     Enables "upsert" functionality. Before creating a check, SITE_NAME looks for
     existing checks, filtered by fields listed in `unique`.
 
-    If no matching check is found, SITE_NAME creates a new check and returns it
+    If SITE_NAME does not find a matching check, it creates a new check and returns it
     with the HTTP status code 201.
 
-    If a matching check *is* found, SITE_NAME will update it
+    If SITE_NAME finds a matching check, it updates the existing check and
-    and return it with HTTP status code 200.
+    and returns it with HTTP status code 200.
 
-    The accepted values for the `unique` field are:
+    The accepted values for the `unique` field are
     `name`, `tags`, `timeout` and `grace`.
 
     Example:
@@ -383,7 +404,7 @@ unique
 :   The API key is either missing or invalid.
 
 403 Forbidden
-:   The account's check limit has been reached. For free accounts,
+:   The account has hit its check limit. For free accounts,
     the limit is 20 checks per account.
 
 ### Example Request
@@ -413,6 +434,7 @@ curl SITE_ROOT/api/v1/checks/ \
   "name": "Backups",
   "next_ping": null,
   "manual_resume": false,
+  "methods": "",
   "pause_url": "SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pause",
   "ping_url": "PING_ENDPOINTf618072a-7bde-4eee-af63-71a77c5723bc",
   "status": "new",
@@ -426,9 +448,8 @@ curl SITE_ROOT/api/v1/checks/ \
 
 `POST SITE_ROOT/api/v1/checks/<uuid>`
 
-Updates an existing check. All request parameters are optional. The check is
+Updates an existing check. All request parameters are optional. If you omit  any
-updated only with the supplied request parameters. If any parameter is omitted,
+parameter, SITE_NAME will leave its value unchanged.
-its value is left unchanged.
 
 ### Request Parameters
 
@@ -449,7 +470,7 @@ tags
 desc
 :   string, optional.
 
-    Description for the check.
+    Description of the check.
 
 timeout
 :   number, optional.
@@ -474,8 +495,9 @@ schedule
 
     A cron expression defining this check's schedule.
 
-    If you specify both "timeout" and "schedule" parameters, "timeout" will be
+    If you specify both `timeout` and `schedule` parameters,
-    ignored and "schedule" will be used.
+    SITE_NAME will save the `schedule` parameter and ignore
+    the `timeout`.
 
     Example for a check running every half-hour:
 
@@ -484,7 +506,7 @@ schedule
 tz
 :   string, optional.
 
-    Server's timezone. This setting only has effect in combination with the
+    Server's timezone. This setting only has an effect in combination with the
     "schedule" parameter.
 
     Example:
@@ -494,11 +516,25 @@ tz
 manual_resume
 :   boolean, optional, default value: false.
 
-    Controls whether a paused ping resumes automatically when pinged (the default),
+    Controls whether a paused ping automatically resumes when pinged (the default),
     or not. If set to false, a paused check will leave the paused state when it receives
-    a ping. If set to true, a paused check will ignore pings and stay paused until it is
+    a ping. If set to true, a paused check will ignore pings and stay paused until
-    either manually resumed from the web dashboard or the `manual_resume` flag is
+    you manually resume it from the web dashboard.
-    changed.
+
+methods
+:   string, optional, default value: "".
+
+    Specifies the allowed HTTP methods for making ping requests.
+    Must be one of the two values: "" (an empty string) or "POST".
+
+    Set this field to "" (an empty string) to allow HEAD, GET,
+    and POST requests.
+
+    Set this field to "POST" to allow only POST requests.
+
+    Example:
+
+    <pre>{"methods": "POST"}</pre>
 
 channels
 :   string, optional.
@@ -563,6 +599,7 @@ curl SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc \
   "name": "Backups",
   "next_ping": null,
   "manual_resume": false,
+  "methods": "",
   "pause_url": "SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pause",
   "ping_url": "PING_ENDPOINTf618072a-7bde-4eee-af63-71a77c5723bc",
   "status": "new",
@@ -618,6 +655,7 @@ header is sometimes required by some network proxies and web servers.
   "name": "Backups",
   "next_ping": null,
   "manual_resume": false,
+  "methods": "",
   "pause_url": "SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pause",
   "ping_url": "PING_ENDPOINTf618072a-7bde-4eee-af63-71a77c5723bc",
   "status": "paused",
@@ -669,6 +707,7 @@ curl SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc \
   "name": "Backups",
   "next_ping": null,
   "manual_resume": false,
+  "methods": "",
   "pause_url": "SITE_ROOT/api/v1/checks/f618072a-7bde-4eee-af63-71a77c5723bc/pause",
   "ping_url": "PING_ENDPOINTf618072a-7bde-4eee-af63-71a77c5723bc",
   "status": "new",