diff --git a/README.md b/README.md
index d7df9a7a..2fa8fec6 100644
--- a/README.md
+++ b/README.md
@@ -416,7 +416,7 @@ There is [a library for create plugin](https://pkg.go.dev/github.com/macrat/ayd/
 
 ##### Probe plugin
 
-Probe plugin which to check the target, receives the target URL as the only one argument of the command.
+Probe plugin, which to check the target, receives the target URL as the only one argument of the command.
 
 For example, target URL `foobar:your-target` has the same mean as below command.
 
@@ -426,27 +426,16 @@ $ ayd-foobar-probe "foobar:your-target"
 
 ##### Alert plugin
 
-Alert plugin which to send alerts, receives below arguments.
-
-1. Alert URL.
-2. Timestamp in RFC3339 format.
-3. Current status of the target.
-4. Current latency in milliseconds.
-5. Target URL that causes the incident.
-6. Message from the latest probe.
-7. Extra values in JSON format.
+Alert plugin, which to send alerts, receives two arguments.
+The first argument is a URL for alert itself.
+The second one is the latest record that fired the alert in JSON format.
 
 For example, the alert URL `foobar:your-alert` for plugin `ayd-foobar-alert` will be called like a below command.
 
 ``` shell
-$ ayd-foobar-alert                      \
-    "foobar:your-alert"                 \
-    "2001-02-30T16:05:06+09:00"         \
-    "FAILURE"                           \
-    "1.234"                             \
-    "ping:your-target"                  \
-    "this is message of the record"     \
-    '{"extra values":"in json format"}'
+$ ayd-foobar-alert       \
+    "foobar:your-alert"  \
+    '{"time":"2001-02-30T16:05:06+09:00", "status":"FAILURE", "latency":"1.234", "target":"ping:your-target", "message":"this is message of the record"}'
 ```
 
 The output of the probe plugin will parsed the same way to [log file](#log-file), but all target URL will add `alert:` prefix and won't not show in status page.
diff --git a/internal/scheme/alert_test.go b/internal/scheme/alert_test.go
index 6de27067..a65c9b84 100644
--- a/internal/scheme/alert_test.go
+++ b/internal/scheme/alert_test.go
@@ -33,7 +33,7 @@ func TestAlerter(t *testing.T) {
 		Error     string
 	}
 	tests := []Test{
-		{"exec:ayd-foo-alert", "alert:exec:ayd-foo-alert", `{"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"","message":"\",,,,,\""}` + "\n---\nexit_code: 0", ""},
+		{"exec:ayd-foo-alert", "alert:exec:ayd-foo-alert", `{"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"","message":""}` + "\n---\nexit_code: 0", ""},
 		{"exec:ayd-bar-probe", "alert:exec:ayd-bar-probe", "arg \"\"\nenv ayd_time=2001-02-03T16:05:06Z ayd_status=FAILURE ayd_latency=12.345 ayd_target=dummy:failure ayd_message=foobar ayd_extra={\"hello\":\"world\"}\n---\nexit_code: 0", ""},
 		{"bar:", "", "", "unsupported scheme"},
 
@@ -60,9 +60,9 @@ func TestAlerter(t *testing.T) {
 		// Windows can not run this test because bat doesn't support double quote character in argument :(
 		tests = append(
 			tests,
-			Test{"foo-bar:hello-world", "alert:foo-bar:hello-world", "\"foo-bar:hello-world,2001-02-03T16:05:06Z,FAILURE,12.345,dummy:failure,foobar\"\n---\nextras: {\"hello\":\"world\"}", ""},
-			Test{"foo:", "alert:foo:", "\"foo:,2001-02-03T16:05:06Z,FAILURE,12.345,dummy:failure,foobar\"\n---\nextras: {\"hello\":\"world\"}", ""},
-			Test{"foo:hello-world", "alert:foo:hello-world", "\"foo:hello-world,2001-02-03T16:05:06Z,FAILURE,12.345,dummy:failure,foobar\"\n---\nextras: {\"hello\":\"world\"}", ""},
+			Test{"foo-bar:hello-world", "alert:foo-bar:hello-world", "foo-bar:hello-world\n---\n" + `record: {"hello":"world","latency":12.345,"message":"foobar","status":"FAILURE","target":"dummy:failure","time":"2001-02-03T16:05:06Z"}`, ""},
+			Test{"foo:", "alert:foo:", "foo:\n---\n" + `record: {"hello":"world","latency":12.345,"message":"foobar","status":"FAILURE","target":"dummy:failure","time":"2001-02-03T16:05:06Z"}`, ""},
+			Test{"foo:hello-world", "alert:foo:hello-world", "foo:hello-world\n---\n" + `record: {"hello":"world","latency":12.345,"message":"foobar","status":"FAILURE","target":"dummy:failure","time":"2001-02-03T16:05:06Z"}`, ""},
 		)
 	}
 
diff --git a/internal/scheme/plugin.go b/internal/scheme/plugin.go
index e7cf6b4d..18f727a1 100644
--- a/internal/scheme/plugin.go
+++ b/internal/scheme/plugin.go
@@ -3,12 +3,10 @@ package scheme
 import (
 	"bufio"
 	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
 	"os"
 	"os/exec"
-	"strconv"
 	"strings"
 	"time"
 
@@ -151,18 +149,7 @@ func (p PluginScheme) Probe(ctx context.Context, r Reporter) {
 func (p PluginScheme) Alert(ctx context.Context, r Reporter, lastRecord api.Record) {
 	args := []string{
 		p.target.String(),
-		lastRecord.Time.Format(time.RFC3339),
-		lastRecord.Status.String(),
-		strconv.FormatFloat(float64(lastRecord.Latency.Microseconds())/1000.0, 'f', -1, 64),
-		lastRecord.Target.String(),
-		lastRecord.Message,
-		"{}",
-	}
-
-	if lastRecord.Extra != nil {
-		if bs, err := json.Marshal(lastRecord.Extra); err == nil {
-			args[len(args)-1] = string(bs)
-		}
+		lastRecord.String(),
 	}
 
 	p.execute(
diff --git a/internal/scheme/plugin_test.go b/internal/scheme/plugin_test.go
index b2673cb7..34068962 100644
--- a/internal/scheme/plugin_test.go
+++ b/internal/scheme/plugin_test.go
@@ -124,16 +124,9 @@ func TestPluginScheme_Alert(t *testing.T) {
 	t.Parallel()
 	PreparePluginPath(t)
 
-	if runtime.GOOS == "windows" {
-		// Windows can not handle double quote in argument :(
-		AssertAlert(t, []ProbeTest{
-			{"foo:hello-world", api.StatusHealthy, "\"foo:hello-world,2001-02-03T16:05:06Z,FAILURE,123.456,dummy:failure,test-message\"", ""},
-		}, 5)
-	} else {
-		AssertAlert(t, []ProbeTest{
-			{"foo:hello-world", api.StatusHealthy, "\"foo:hello-world,2001-02-03T16:05:06Z,FAILURE,123.456,dummy:failure,test-message\"\n---\nextras: {\"hello\":\"world\"}", ""},
-		}, 5)
-	}
+	AssertAlert(t, []ProbeTest{
+		{"foo:hello-world", api.StatusHealthy, "foo:hello-world\n---\n" + `record: {"hello":"world","latency":123.456,"message":"test-message","status":"FAILURE","target":"dummy:failure","time":"2001-02-03T16:05:06Z"}`, ""},
+	}, 5)
 }
 
 func TestPluginProbe_inactiveTargetHandling(t *testing.T) {
diff --git a/internal/scheme/source_test.go b/internal/scheme/source_test.go
index 1f9bf9d3..4ddcb9f4 100644
--- a/internal/scheme/source_test.go
+++ b/internal/scheme/source_test.go
@@ -304,20 +304,22 @@ func TestSourceScheme_Alert(t *testing.T) {
 		r.Records[1], r.Records[2] = r.Records[2], r.Records[1]
 	}
 
-	expected := `"foo:alert-test,2021-01-02T15:04:05Z,FAILURE,123.456,dummy:hello-world,test-message"`
+	expected := "foo:alert-test"
 	if r.Records[1].Message != expected {
 		t.Errorf("unexpected message for foo:alert-test\n--- expected --\n%s\n--- actual ---\n%s", expected, r.Records[1].Message)
 	}
 
-	if runtime.GOOS == "windows" {
-		// Windows can not handle double quote in argument, so test on Windows does not use extra values :(
-		if r.Records[1].Extra != nil {
-			t.Errorf("unexpected extra values: %#v", r.Records[1].Extra)
-		}
-	} else {
-		if diff := cmp.Diff(r.Records[1].Extra, map[string]interface{}{"extras": map[string]interface{}{}}); diff != "" {
-			t.Errorf("unexpected extra values\n%s", diff)
-		}
+	extra := map[string]interface{}{
+		"record": map[string]interface{}{
+			"latency": 123.456,
+			"message": "test-message",
+			"status":  "FAILURE",
+			"target":  "dummy:hello-world",
+			"time":    "2021-01-02T15:04:05Z",
+		},
+	}
+	if diff := cmp.Diff(r.Records[1].Extra, extra); diff != "" {
+		t.Errorf("unexpected extra values\n%s", diff)
 	}
 }
 
diff --git a/internal/scheme/testdata/ayd-foo-alert b/internal/scheme/testdata/ayd-foo-alert
index 1a6ac2dd..e1a1ea2f 100755
--- a/internal/scheme/testdata/ayd-foo-alert
+++ b/internal/scheme/testdata/ayd-foo-alert
@@ -1,7 +1,7 @@
 #!/bin/sh
 
-if [ "$7" = "" ]; then
-    echo '{"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"'$1'","message":"\"'$1,$2,$3,$4,$5,$6'\""}'
+if [ "$2" = "" ]; then
+    echo '{"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"'$1'","message":"'$1'"}'
 else
-    echo '{"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"'$1'","message":"\"'$1,$2,$3,$4,$5,$6'\"","extras":'"$7"'}'
+    echo '{"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"'$1'","message":"'$1'","record":'$2'}'
 fi
diff --git a/internal/scheme/testdata/ayd-foo-alert.bat b/internal/scheme/testdata/ayd-foo-alert.bat
index adca00cc..03819997 100755
--- a/internal/scheme/testdata/ayd-foo-alert.bat
+++ b/internal/scheme/testdata/ayd-foo-alert.bat
@@ -1,3 +1,7 @@
 @echo off
 
-echo {"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"%1","message":"\"%1,%2,%3,%4,%5,%6\""}
+if "%2" == "" (
+    echo {"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"%1","message":"%1"}
+) else (
+    echo {"time":"2001-02-03T16:05:06Z","status":"HEALTHY","latency":123.456,"target":"%1","message":"%1","record":%2}
+)
diff --git a/lib-ayd/args.go b/lib-ayd/args.go
index c95dce3e..eb3812d4 100644
--- a/lib-ayd/args.go
+++ b/lib-ayd/args.go
@@ -1,16 +1,16 @@
 package ayd
 
 import (
-	"encoding/json"
 	"os"
-	"strconv"
-	"strings"
 	"time"
 
 	"github.com/macrat/ayd/internal/ayderr"
 )
 
 // ProbePluginArgs is arguments for probe plugin
+//
+// Deprecated: since version 0.16. This struct will removed in future version.
+// Please parse using ParseURL instead of this.
 type ProbePluginArgs struct {
 	TargetURL *URL
 }
@@ -37,6 +37,9 @@ func ParseProbePluginArgs() (ProbePluginArgs, error) {
 }
 
 // AlertPluginArgs is arguments for alert plugin
+//
+// Deprecated: since version 0.16. This struct will removed in future version.
+// Please parse using ParseURL and ParseRecord instead of this.
 type AlertPluginArgs struct {
 	AlertURL  *URL
 	Time      time.Time
@@ -49,8 +52,8 @@ type AlertPluginArgs struct {
 
 // ParseAlertPluginArgsFrom is parse arguments for alert plugin
 func ParseAlertPluginArgsFrom(args []string) (AlertPluginArgs, error) {
-	if len(args) != 8 {
-		return AlertPluginArgs{}, ayderr.New(ErrArgumentCount, nil, "invalid argument: should give exactly 7 arguments")
+	if len(args) != 3 {
+		return AlertPluginArgs{}, ayderr.New(ErrArgumentCount, nil, "invalid argument: should give exactly 2 arguments")
 	}
 
 	alertURL, err := ParseURL(args[1])
@@ -58,36 +61,19 @@ func ParseAlertPluginArgsFrom(args []string) (AlertPluginArgs, error) {
 		return AlertPluginArgs{}, ayderr.New(ErrInvalidArgumentValue, err, "invalid alert URL")
 	}
 
-	timestamp, err := ParseTime(args[2])
-	if err != nil {
-		return AlertPluginArgs{}, ayderr.New(ErrInvalidArgumentValue, err, "invalid timestamp")
-	}
-
-	status := ParseStatus(strings.ToUpper(args[3]))
-
-	latency, err := strconv.ParseFloat(args[4], 64)
+	record, err := ParseRecord(args[2])
 	if err != nil {
-		return AlertPluginArgs{}, ayderr.New(ErrInvalidArgumentValue, err, "invalid latency")
-	}
-
-	targetURL, err := ParseURL(args[5])
-	if err != nil {
-		return AlertPluginArgs{}, ayderr.New(ErrInvalidArgumentValue, err, "invalid target URL")
-	}
-
-	var extra map[string]interface{}
-	if err := json.Unmarshal([]byte(args[7]), &extra); err != nil {
-		return AlertPluginArgs{}, ayderr.New(ErrInvalidArgumentValue, err, "invalid extra values")
+		return AlertPluginArgs{}, err
 	}
 
 	return AlertPluginArgs{
 		AlertURL:  alertURL,
-		Time:      timestamp,
-		Status:    status,
-		Latency:   time.Duration(latency) * time.Millisecond,
-		TargetURL: targetURL,
-		Message:   args[6],
-		Extra:     extra,
+		Time:      record.Time,
+		Status:    record.Status,
+		Latency:   record.Latency,
+		TargetURL: record.Target,
+		Message:   record.Message,
+		Extra:     record.Extra,
 	}, nil
 }
 
diff --git a/lib-ayd/args_test.go b/lib-ayd/args_test.go
index aa2ab2a4..932f6533 100644
--- a/lib-ayd/args_test.go
+++ b/lib-ayd/args_test.go
@@ -68,7 +68,7 @@ func TestParseAlertPluginArgs(t *testing.T) {
 		Error   string
 	}{
 		{
-			[]string{"./ayd-test-alert", "foo:bar", "2001-02-03T16:05:06Z", "HEALTHY", "123.456", "bar:baz", "foo bar", `{"hello":"world"}`},
+			[]string{"./ayd-test-alert", "foo:bar", `{"time":"2001-02-03T16:05:06Z", "status":"HEALTHY", "latency":123.456, "target":"bar:baz", "message":"foo bar", "hello":"world"}`},
 			"foo:bar",
 			"2001-02-03 16:05:06 +0000 UTC",
 			"HEALTHY",
@@ -87,10 +87,10 @@ func TestParseAlertPluginArgs(t *testing.T) {
 			"",
 			"",
 			nil,
-			`invalid argument: should give exactly 7 arguments`,
+			`invalid argument: should give exactly 2 arguments`,
 		},
 		{
-			[]string{"./ayd-test-alert", "foo:bar", "2001-02-03T16:05:06Z", "HEALTHY", "123.456", "bar:baz", "foo bar", "{}", "unknown extra arg"},
+			[]string{"./ayd-test-alert", "foo:bar", `{"time":"2001-02-03T16:05:06Z", "status":"HEALTHY", "latency":123.456, "target":"bar:baz", "message":"foo bar", "hello":"world"}`, "extra something"},
 			"",
 			"",
 			"",
@@ -98,10 +98,10 @@ func TestParseAlertPluginArgs(t *testing.T) {
 			"",
 			"",
 			nil,
-			`invalid argument: should give exactly 7 arguments`,
+			`invalid argument: should give exactly 2 arguments`,
 		},
 		{
-			[]string{"./ayd-test-alert", "::invalid::", "2001-02-03T16:05:06Z", "HEALTHY", "123.456", "bar:baz", "foo bar", "{}"},
+			[]string{"./ayd-test-alert", "::invalid::", `{"time":"2001-02-03T16:05:06Z", "status":"HEALTHY", "latency":123.456, "target":"bar:baz", "message":"foo bar", "hello":"world"}`},
 			"",
 			"",
 			"",
@@ -112,7 +112,7 @@ func TestParseAlertPluginArgs(t *testing.T) {
 			`invalid alert URL: parse "::invalid::": missing protocol scheme`,
 		},
 		{
-			[]string{"./ayd-test-alert", "foo:bar", "2001-02-03T16:05:06Z", "HEALTHY", "123.456", "::invalid::", "foo bar", "{}"},
+			[]string{"./ayd-test-alert", "foo:bar", `{"time":"2001-02-03T16:05:06Z", "status":"HEALTHY", "latency":123.456, "target":"::invalid::", "message":"foo bar", "hello":"world"}`},
 			"",
 			"",
 			"",
@@ -120,32 +120,10 @@ func TestParseAlertPluginArgs(t *testing.T) {
 			"",
 			"",
 			nil,
-			`invalid target URL: parse "::invalid::": missing protocol scheme`,
-		},
-		{
-			[]string{"./ayd-test-alert", "foo:bar", "this is not a time", "HEALTHY", "123.456", "bar:baz", "foo bar", "{}"},
-			"",
-			"",
-			"",
-			"",
-			"",
-			"",
-			nil,
-			`invalid timestamp: invalid format: "this is not a time"`,
-		},
-		{
-			[]string{"./ayd-test-alert", "foo:bar", "2001-02-03T16:05:06Z", "HEALTHY", "not a latency", "bar:baz", "foo bar", "{}"},
-			"",
-			"",
-			"",
-			"",
-			"",
-			"",
-			nil,
-			`invalid latency: strconv.ParseFloat: parsing "not a latency": invalid syntax`,
+			`invalid record: target: parse "::invalid::": missing protocol scheme`,
 		},
 		{
-			[]string{"./ayd-test-alert", "foo:bar", "2001-02-03T16:05:06Z", "HEALTHY", "123.456", "bar:baz", "foo bar", `invalid extra`},
+			[]string{"./ayd-test-alert", "foo:bar", `wah`},
 			"",
 			"",
 			"",
@@ -153,7 +131,7 @@ func TestParseAlertPluginArgs(t *testing.T) {
 			"",
 			"",
 			nil,
-			"invalid extra values: invalid character 'i' looking for beginning of value",
+			`invalid record: invalid character 'w' looking for beginning of value`,
 		},
 	}