diff --git a/.changesets/add-nginx-metrics-support.md b/.changesets/add-nginx-metrics-support.md
new file mode 100644
index 000000000..ae48d6a76
--- /dev/null
+++ b/.changesets/add-nginx-metrics-support.md
@@ -0,0 +1,6 @@
+---
+bump: "patch"
+type: "add"
+---
+
+Add NGINX metrics support. See [our documentation](https://docs.appsignal.com/metrics/nginx.html) for details.
diff --git a/ext/agent.rb b/ext/agent.rb
index e13527553..8b83f4c65 100644
--- a/ext/agent.rb
+++ b/ext/agent.rb
@@ -4,7 +4,7 @@
 # Modifications to this file will be overwritten with the next agent release.
 
 APPSIGNAL_AGENT_CONFIG = {
-  "version" => "c0e80b9",
+  "version" => "debb8cf",
   "mirrors" => [
     "https://appsignal-agent-releases.global.ssl.fastly.net",
     "https://d135dj0rjqvssy.cloudfront.net"
@@ -12,131 +12,131 @@
   "triples" => {
     "x86_64-darwin" => {
       "static" => {
-        "checksum" => "c0e1fc966eff49dd942ed07b44f5c5db6be41676f4e35530c300bac8f99e03c4",
+        "checksum" => "7597130ddfeac866b4eea69348d446603b19b25c9ebd0714a3c39546d0cb6bc3",
         "filename" => "appsignal-x86_64-darwin-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "38805c50262c9dbc5c4e7479d274b5e41d6df6e86e6c09d76b9f3f471dcf8787",
+        "checksum" => "4cef843a905b7d9b2c0f5ed0a3debf7351dfadf1a4afda3344719d5bbbb73163",
         "filename" => "appsignal-x86_64-darwin-all-dynamic.tar.gz"
       }
     },
     "universal-darwin" => {
       "static" => {
-        "checksum" => "c0e1fc966eff49dd942ed07b44f5c5db6be41676f4e35530c300bac8f99e03c4",
+        "checksum" => "7597130ddfeac866b4eea69348d446603b19b25c9ebd0714a3c39546d0cb6bc3",
         "filename" => "appsignal-x86_64-darwin-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "38805c50262c9dbc5c4e7479d274b5e41d6df6e86e6c09d76b9f3f471dcf8787",
+        "checksum" => "4cef843a905b7d9b2c0f5ed0a3debf7351dfadf1a4afda3344719d5bbbb73163",
         "filename" => "appsignal-x86_64-darwin-all-dynamic.tar.gz"
       }
     },
     "aarch64-darwin" => {
       "static" => {
-        "checksum" => "37fcdf17250ce9e2149f28a8492074f5957691636ab542c7073b323a1b9dbdd8",
+        "checksum" => "e4b4f0f3d75b576411f5fa16e1257bde2e21efcd9cadae3a05d22bbb0e094e09",
         "filename" => "appsignal-aarch64-darwin-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "0fe962abf0885888f38d1767b959ea25ea8c4b38813d7a23fbebe2aa62873341",
+        "checksum" => "180b3cd9f868607cc5e1b84df471e17caf2c06c7f904f345462696b8c9c32cac",
         "filename" => "appsignal-aarch64-darwin-all-dynamic.tar.gz"
       }
     },
     "arm64-darwin" => {
       "static" => {
-        "checksum" => "37fcdf17250ce9e2149f28a8492074f5957691636ab542c7073b323a1b9dbdd8",
+        "checksum" => "e4b4f0f3d75b576411f5fa16e1257bde2e21efcd9cadae3a05d22bbb0e094e09",
         "filename" => "appsignal-aarch64-darwin-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "0fe962abf0885888f38d1767b959ea25ea8c4b38813d7a23fbebe2aa62873341",
+        "checksum" => "180b3cd9f868607cc5e1b84df471e17caf2c06c7f904f345462696b8c9c32cac",
         "filename" => "appsignal-aarch64-darwin-all-dynamic.tar.gz"
       }
     },
     "arm-darwin" => {
       "static" => {
-        "checksum" => "37fcdf17250ce9e2149f28a8492074f5957691636ab542c7073b323a1b9dbdd8",
+        "checksum" => "e4b4f0f3d75b576411f5fa16e1257bde2e21efcd9cadae3a05d22bbb0e094e09",
         "filename" => "appsignal-aarch64-darwin-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "0fe962abf0885888f38d1767b959ea25ea8c4b38813d7a23fbebe2aa62873341",
+        "checksum" => "180b3cd9f868607cc5e1b84df471e17caf2c06c7f904f345462696b8c9c32cac",
         "filename" => "appsignal-aarch64-darwin-all-dynamic.tar.gz"
       }
     },
     "aarch64-linux" => {
       "static" => {
-        "checksum" => "ce9075ee5bc14ea786b734793b6bb6331567398cab6a21f2ceaa9062cfbdb373",
+        "checksum" => "1cfd0b66000d32e10529b61c78c2f96c217a0f1eb40ddb12869c36ba8595f94c",
         "filename" => "appsignal-aarch64-linux-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "eb798538e0e32b19de0afba924c3cb8979a5e57433de4b1a12a6aeaf7233929b",
+        "checksum" => "87b37a4d4e2edc1f70c66b48bf40a0c27e7cc05433595a4744e83acd1abe5f52",
         "filename" => "appsignal-aarch64-linux-all-dynamic.tar.gz"
       }
     },
     "i686-linux" => {
       "static" => {
-        "checksum" => "ea3d1a29cf1534293738f2bd27ae29b8addf8dbe34dde77dc4ae150e109e2e4f",
+        "checksum" => "4f90a840931a9c4d0bc0b90b5a20268a0f67e87b1d9cdc4f58f874e8077e96ab",
         "filename" => "appsignal-i686-linux-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "add159ec5bcf1b1a3362c08f9f765230d99c0431c567d845e31c51389792a51c",
+        "checksum" => "88841f6c27b486bd7eb43b72fb226f7bd3e88ff7d5afa6c9c250ffe13f8b20fc",
         "filename" => "appsignal-i686-linux-all-dynamic.tar.gz"
       }
     },
     "x86-linux" => {
       "static" => {
-        "checksum" => "ea3d1a29cf1534293738f2bd27ae29b8addf8dbe34dde77dc4ae150e109e2e4f",
+        "checksum" => "4f90a840931a9c4d0bc0b90b5a20268a0f67e87b1d9cdc4f58f874e8077e96ab",
         "filename" => "appsignal-i686-linux-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "add159ec5bcf1b1a3362c08f9f765230d99c0431c567d845e31c51389792a51c",
+        "checksum" => "88841f6c27b486bd7eb43b72fb226f7bd3e88ff7d5afa6c9c250ffe13f8b20fc",
         "filename" => "appsignal-i686-linux-all-dynamic.tar.gz"
       }
     },
     "x86_64-linux" => {
       "static" => {
-        "checksum" => "adeceb091c4ed277c29eda018ffc61fd064e5c486b2b0a239b26873168a7fdb0",
+        "checksum" => "bbb7e29a20384ecc848291a2637ecb2653a0020a62606c19b631dbe8e04d6089",
         "filename" => "appsignal-x86_64-linux-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "121abc5d34db302c130cf49ce1dad032025e6717efd63f5cf04ba0b55b5fc863",
+        "checksum" => "3cd9640f131c406c20955c23e84b91801872e2a4fb6935a015f780b94c9e38b7",
         "filename" => "appsignal-x86_64-linux-all-dynamic.tar.gz"
       }
     },
     "x86_64-linux-musl" => {
       "static" => {
-        "checksum" => "b57aec8c334b1d3646c80d87f20372287e4e2bdbd798c195e0e36ceeb2aac68a",
+        "checksum" => "69b48e0bcacbc1f2bf642800a7d5be2cf5031f2fabe567c39ac0faaa0143d8fb",
         "filename" => "appsignal-x86_64-linux-musl-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "67a918b1848f979afe01eb56ce1661fb5b5910d4c7d691fcf0e304203bd7bd7a",
+        "checksum" => "b3ae34ad2dfccff17604a5a821ff5f13c121c1967004cd994ebb7350713d749b",
         "filename" => "appsignal-x86_64-linux-musl-all-dynamic.tar.gz"
       }
     },
     "aarch64-linux-musl" => {
       "static" => {
-        "checksum" => "fc780524942fc7aeaa4cabec64dfc104c82969df7e8b5cd0fa8eae24c1c9b304",
+        "checksum" => "0db801296acce9ff11ca19a14c4a113d30e2f155fcc790af75b80a0013503484",
         "filename" => "appsignal-aarch64-linux-musl-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "92ed33ca9f402f9e822e5777b291f7a062545767ea92dea7eaa94db4f82d8130",
+        "checksum" => "de0acc4c0d91c47ff855394671917566bb910a2989f6543ce9c3a190fc56b12f",
         "filename" => "appsignal-aarch64-linux-musl-all-dynamic.tar.gz"
       }
     },
     "x86_64-freebsd" => {
       "static" => {
-        "checksum" => "574137de415487afe8d2cc29eac3b1fda2c8e1001474b8f25ebee0cbb32fb1ca",
+        "checksum" => "bba6e8f2d5492ef15a5623ee606c91d4db726f917bb2f7e86fe26afc880cafb3",
         "filename" => "appsignal-x86_64-freebsd-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "9dcc3454c14e8a7a0d7250b35864b6f0f205d5c730ca510e7b77628e024a703f",
+        "checksum" => "dbadaa353f29216dc7165156f22301c28e39a4dc089817e2fde7349f7c443e28",
         "filename" => "appsignal-x86_64-freebsd-all-dynamic.tar.gz"
       }
     },
     "amd64-freebsd" => {
       "static" => {
-        "checksum" => "574137de415487afe8d2cc29eac3b1fda2c8e1001474b8f25ebee0cbb32fb1ca",
+        "checksum" => "bba6e8f2d5492ef15a5623ee606c91d4db726f917bb2f7e86fe26afc880cafb3",
         "filename" => "appsignal-x86_64-freebsd-all-static.tar.gz"
       },
       "dynamic" => {
-        "checksum" => "9dcc3454c14e8a7a0d7250b35864b6f0f205d5c730ca510e7b77628e024a703f",
+        "checksum" => "dbadaa353f29216dc7165156f22301c28e39a4dc089817e2fde7349f7c443e28",
         "filename" => "appsignal-x86_64-freebsd-all-dynamic.tar.gz"
       }
     }
diff --git a/lib/appsignal/config.rb b/lib/appsignal/config.rb
index d83109ce9..1cb94fc4b 100644
--- a/lib/appsignal/config.rb
+++ b/lib/appsignal/config.rb
@@ -18,6 +18,7 @@ class Config
       :enable_host_metrics            => true,
       :enable_minutely_probes         => true,
       :enable_statsd                  => true,
+      :enable_nginx_metrics           => false,
       :endpoint                       => "https://push.appsignal.com",
       :files_world_accessible         => true,
       :filter_parameters              => [],
@@ -67,6 +68,7 @@ class Config
       "APPSIGNAL_ENABLE_HOST_METRICS"            => :enable_host_metrics,
       "APPSIGNAL_ENABLE_MINUTELY_PROBES"         => :enable_minutely_probes,
       "APPSIGNAL_ENABLE_STATSD"                  => :enable_statsd,
+      "APPSIGNAL_ENABLE_NGINX_METRICS"           => :enable_nginx_metrics,
       "APPSIGNAL_FILES_WORLD_ACCESSIBLE"         => :files_world_accessible,
       "APPSIGNAL_FILTER_PARAMETERS"              => :filter_parameters,
       "APPSIGNAL_FILTER_SESSION_DATA"            => :filter_session_data,
@@ -120,6 +122,7 @@ class Config
       APPSIGNAL_ENABLE_HOST_METRICS
       APPSIGNAL_ENABLE_MINUTELY_PROBES
       APPSIGNAL_ENABLE_STATSD
+      APPSIGNAL_ENABLE_NGINX_METRICS
       APPSIGNAL_FILES_WORLD_ACCESSIBLE
       APPSIGNAL_INSTRUMENT_HTTP_RB
       APPSIGNAL_INSTRUMENT_NET_HTTP
@@ -313,6 +316,7 @@ def write_to_environment # rubocop:disable Metrics/AbcSize
       ENV["_APPSIGNAL_DNS_SERVERS"]                  = config_hash[:dns_servers].join(",")
       ENV["_APPSIGNAL_ENABLE_HOST_METRICS"]          = config_hash[:enable_host_metrics].to_s
       ENV["_APPSIGNAL_ENABLE_STATSD"]                = config_hash[:enable_statsd].to_s
+      ENV["_APPSIGNAL_ENABLE_NGINX_METRICS"]         = config_hash[:enable_nginx_metrics].to_s
       ENV["_APPSIGNAL_ENVIRONMENT"]                  = env
       ENV["_APPSIGNAL_FILES_WORLD_ACCESSIBLE"]       = config_hash[:files_world_accessible].to_s
       ENV["_APPSIGNAL_FILTER_PARAMETERS"]            = config_hash[:filter_parameters].join(",")
diff --git a/spec/integration/diagnose b/spec/integration/diagnose
index 4fa6c98c0..1bc7d0d59 160000
--- a/spec/integration/diagnose
+++ b/spec/integration/diagnose
@@ -1 +1 @@
-Subproject commit 4fa6c98c0c77da1972cd9286b3465fd50710d3e7
+Subproject commit 1bc7d0d594376948f594b34858e6387bc85a1c91
diff --git a/spec/lib/appsignal/config_spec.rb b/spec/lib/appsignal/config_spec.rb
index 73d852606..1ec86c5ac 100644
--- a/spec/lib/appsignal/config_spec.rb
+++ b/spec/lib/appsignal/config_spec.rb
@@ -159,6 +159,7 @@
         :enable_host_metrics            => true,
         :enable_minutely_probes         => true,
         :enable_statsd                  => true,
+        :enable_nginx_metrics           => false,
         :endpoint                       => "https://push.appsignal.com",
         :files_world_accessible         => true,
         :filter_parameters              => [],