diff --git a/src/main/kotlin/Main.kt b/src/main/kotlin/Main.kt
index f2a59b6..8f69baa 100644
--- a/src/main/kotlin/Main.kt
+++ b/src/main/kotlin/Main.kt
@@ -1,5 +1,5 @@
 fun main(args: Array<String>) {
-    println("Hello World!")
+    println("Cloudflare DDNS 更新程式已啟動")
 
     // Try adding program arguments via Run/Debug configuration.
     // Learn more about running applications: https://www.jetbrains.com/help/idea/running-applications.html.
diff --git a/src/main/kotlin/api/CloudflareApiService.kt b/src/main/kotlin/api/CloudflareApiService.kt
new file mode 100644
index 0000000..783dcea
--- /dev/null
+++ b/src/main/kotlin/api/CloudflareApiService.kt
@@ -0,0 +1,35 @@
+package api
+
+import model.CloudflareResult
+import model.verifyToken.VerifyTokenResult
+import model.zones.UpdateDnsBody
+import model.zones.DnsResult
+import model.zones.ZonesResult
+import retrofit2.http.*
+
+interface CloudflareApiService {
+
+    @GET("/client/v4/user/tokens/verify")
+    suspend fun getVerifyToken(
+        @Header("Authorization") token: String
+    ): CloudflareResult<VerifyTokenResult>
+
+    @GET("/client/v4/zones")
+    suspend fun getZones(
+        @Header("Authorization") token: String
+    ): CloudflareResult<ZonesResult>
+
+    @GET("/client/v4/zones/{ZONE_ID}/dns_records")
+    suspend fun getZoneDnsRecords(
+        @Header("Authorization") token: String,
+        @Path("ZONE_ID") zoneId: String
+    ): CloudflareResult<List<DnsResult>>
+
+    @PUT("/client/v4/zones/{ZONE_ID}/dns_records/{RECORD_ID}")
+    suspend fun updateZoneDnsRecords(
+        @Header("Authorization") token: String,
+        @Path("ZONE_ID") zoneId: String,
+        @Path("RECORD_ID") recordId: String,
+        @Body body: UpdateDnsBody
+    ): CloudflareResult<DnsResult>
+}
\ No newline at end of file
diff --git a/src/main/kotlin/model/CloudflareResult.kt b/src/main/kotlin/model/CloudflareResult.kt
new file mode 100644
index 0000000..6494c3f
--- /dev/null
+++ b/src/main/kotlin/model/CloudflareResult.kt
@@ -0,0 +1,9 @@
+package model
+
+data class CloudflareResult<T>(
+    val result: T,
+    val result_info: ResultInfo?,
+    val success: Boolean,
+    val errors: List<Message>?,
+    val messages: List<Message>?
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/Message.kt b/src/main/kotlin/model/Message.kt
new file mode 100644
index 0000000..599a6d4
--- /dev/null
+++ b/src/main/kotlin/model/Message.kt
@@ -0,0 +1,6 @@
+package model
+
+data class Message(
+    val code: Int,
+    val message: String
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/ResultInfo.kt b/src/main/kotlin/model/ResultInfo.kt
new file mode 100644
index 0000000..b7e4675
--- /dev/null
+++ b/src/main/kotlin/model/ResultInfo.kt
@@ -0,0 +1,9 @@
+package model
+
+data class ResultInfo(
+    val count: Int,
+    val page: Int,
+    val per_page: Int,
+    val total_count: Int,
+    val total_pages: Int
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/verifyToken/VerifyTokenResult.kt b/src/main/kotlin/model/verifyToken/VerifyTokenResult.kt
new file mode 100644
index 0000000..cc2a0c7
--- /dev/null
+++ b/src/main/kotlin/model/verifyToken/VerifyTokenResult.kt
@@ -0,0 +1,6 @@
+package model.verifyToken
+
+data class VerifyTokenResult(
+    val id: String,
+    val status: String
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/Account.kt b/src/main/kotlin/model/zones/Account.kt
new file mode 100644
index 0000000..5b62e2b
--- /dev/null
+++ b/src/main/kotlin/model/zones/Account.kt
@@ -0,0 +1,6 @@
+package model.zones
+
+data class Account(
+    val id: String,
+    val name: String
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/DnsResult.kt b/src/main/kotlin/model/zones/DnsResult.kt
new file mode 100644
index 0000000..a9c44ee
--- /dev/null
+++ b/src/main/kotlin/model/zones/DnsResult.kt
@@ -0,0 +1,19 @@
+package model.zones
+
+data class DnsResult(
+    val id: String,
+    val zone_id: String,
+    val zone_name: String,
+    val name: String,
+    val type: String,
+    val content: String,
+    val proxiable: Boolean,
+    val proxied: Boolean,
+    val ttl: Int,
+    val locked: Boolean,
+    val meta: Meta,
+    val comment: String?,
+    val tags: List<String>?,
+    val created_on: String,
+    val modified_on: String
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/Meta.kt b/src/main/kotlin/model/zones/Meta.kt
new file mode 100644
index 0000000..624e537
--- /dev/null
+++ b/src/main/kotlin/model/zones/Meta.kt
@@ -0,0 +1,13 @@
+package model.zones
+
+data class Meta(
+    val step: Int?,
+    val custom_certificate_quota: Int?,
+    val page_rule_quota: Int?,
+    val phishing_detected: Boolean?,
+    val multiple_railguns_allowed: Boolean?,
+    val auto_added: Boolean?,
+    val managed_by_apps: Boolean?,
+    val managed_by_argo_tunnel: Boolean?,
+    val source: String?
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/Owner.kt b/src/main/kotlin/model/zones/Owner.kt
new file mode 100644
index 0000000..52b3973
--- /dev/null
+++ b/src/main/kotlin/model/zones/Owner.kt
@@ -0,0 +1,7 @@
+package model.zones
+
+data class Owner(
+    val id: String?,
+    val type: String,
+    val email: String?
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/Plan.kt b/src/main/kotlin/model/zones/Plan.kt
new file mode 100644
index 0000000..2a20112
--- /dev/null
+++ b/src/main/kotlin/model/zones/Plan.kt
@@ -0,0 +1,14 @@
+package model.zones
+
+data class Plan(
+    val id: String,
+    val name: String,
+    val price: Int,
+    val currency: String,
+    val frequency: String,
+    val is_subscribed: Boolean,
+    val can_subscribe: Boolean,
+    val legacy_id: String,
+    val legacy_discount: Boolean,
+    val externally_managed: Boolean
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/Tenant.kt b/src/main/kotlin/model/zones/Tenant.kt
new file mode 100644
index 0000000..4d4b785
--- /dev/null
+++ b/src/main/kotlin/model/zones/Tenant.kt
@@ -0,0 +1,6 @@
+package model.zones
+
+data class Tenant(
+    val id: String?,
+    val name: String?
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/TenantUnit.kt b/src/main/kotlin/model/zones/TenantUnit.kt
new file mode 100644
index 0000000..56ba184
--- /dev/null
+++ b/src/main/kotlin/model/zones/TenantUnit.kt
@@ -0,0 +1,5 @@
+package model.zones
+
+data class TenantUnit(
+    val id: String?
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/UpdateDnsBody.kt b/src/main/kotlin/model/zones/UpdateDnsBody.kt
new file mode 100644
index 0000000..18e6b9c
--- /dev/null
+++ b/src/main/kotlin/model/zones/UpdateDnsBody.kt
@@ -0,0 +1,9 @@
+package model.zones
+
+data class UpdateDnsBody(
+    val content: String,
+    val name: String,
+    val proxied: Boolean,
+    val ttl: Int,
+    val type: String
+)
\ No newline at end of file
diff --git a/src/main/kotlin/model/zones/ZonesResult.kt b/src/main/kotlin/model/zones/ZonesResult.kt
new file mode 100644
index 0000000..1009cc0
--- /dev/null
+++ b/src/main/kotlin/model/zones/ZonesResult.kt
@@ -0,0 +1,24 @@
+package model.zones
+
+data class ZonesResult(
+    val id: String,
+    val name: String,
+    val status: String,
+    val paused: Boolean,
+    val type: String,
+    val development_mode: Int,
+    val name_servers: List<String>,
+    val original_name_servers: List<String>,
+    val original_registrar: String,
+    val original_dnshost: String?,
+    val modified_on: String,
+    val created_on: String,
+    val activated_on: String,
+    val meta: Meta,
+    val owner: Owner,
+    val account: Account,
+    val tenant: Tenant,
+    val tenant_unit: TenantUnit,
+    val permissions: List<String>,
+    val plan: Plan
+)
\ No newline at end of file