diff --git a/composer.json b/composer.json
index 45482043..47db2dbe 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
     "name": "fleetbase/core-api",
-    "version": "1.6.52",
+    "version": "1.6.53",
     "description": "Core Framework and Resources for Fleetbase API",
     "keywords": [
         "fleetbase",
diff --git a/config/sms.php b/config/sms.php
index 6448cedb..5844acb9 100644
--- a/config/sms.php
+++ b/config/sms.php
@@ -110,11 +110,13 @@
 
         'custom_http' => [
             'enabled'     => env('CUSTOM_HTTP_SMS_ENABLED', false),
+            'method'      => env('CUSTOM_HTTP_SMS_METHOD', 'POST'),
             'url'         => env('CUSTOM_HTTP_SMS_URL', ''),
             'from'        => env('CUSTOM_HTTP_SMS_FROM', ''),
             'auth_header' => env('CUSTOM_HTTP_SMS_AUTH_HEADER', ''),
             'auth_token'  => env('CUSTOM_HTTP_SMS_AUTH_TOKEN', ''),
             'headers'     => [],
+            'query_params' => [],
             'body'        => [
                 'to'   => '{{to}}',
                 'text' => '{{text}}',
diff --git a/migrations/2026_06_22_000001_add_settlement_status_to_transactions_table.php b/migrations/2026_06_22_000001_add_settlement_status_to_transactions_table.php
new file mode 100644
index 00000000..6bef2cbc
--- /dev/null
+++ b/migrations/2026_06_22_000001_add_settlement_status_to_transactions_table.php
@@ -0,0 +1,66 @@
+<?php
+
+use Fleetbase\Models\Transaction;
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    public function up(): void
+    {
+        Schema::table('transactions', function (Blueprint $table) {
+            if (!Schema::hasColumn('transactions', 'settlement_status')) {
+                $table->string('settlement_status', 32)
+                    ->default(Transaction::SETTLEMENT_STATUS_UNPAID)
+                    ->after('status')
+                    ->index('transactions_settlement_status_index');
+            }
+        });
+
+        DB::table('transactions')
+            ->whereNull('settlement_status')
+            ->update(['settlement_status' => Transaction::SETTLEMENT_STATUS_UNPAID]);
+
+        DB::table('transactions')
+            ->where('status', 'completed')
+            ->update(['status' => Transaction::STATUS_SUCCESS]);
+
+        DB::table('transactions')
+            ->where('status', 'paid')
+            ->update([
+                'status'            => Transaction::STATUS_SUCCESS,
+                'settlement_status' => Transaction::SETTLEMENT_STATUS_PAID,
+                'settled_at'        => DB::raw('COALESCE(settled_at, updated_at, created_at)'),
+            ]);
+
+        DB::table('transactions')
+            ->whereIn('type', [
+                Transaction::TYPE_INVOICE_PAYMENT,
+                Transaction::TYPE_WALLET_DEPOSIT,
+                Transaction::TYPE_WALLET_WITHDRAWAL,
+                Transaction::TYPE_WALLET_TRANSFER_IN,
+                Transaction::TYPE_WALLET_TRANSFER_OUT,
+                'deposit',
+                'withdrawal',
+                'transfer_in',
+                'transfer_out',
+            ])
+            ->where('status', Transaction::STATUS_SUCCESS)
+            ->where('settlement_status', Transaction::SETTLEMENT_STATUS_UNPAID)
+            ->update([
+                'settlement_status' => Transaction::SETTLEMENT_STATUS_PAID,
+                'settled_at'        => DB::raw('COALESCE(settled_at, updated_at, created_at)'),
+            ]);
+    }
+
+    public function down(): void
+    {
+        Schema::table('transactions', function (Blueprint $table) {
+            if (Schema::hasColumn('transactions', 'settlement_status')) {
+                $table->dropIndex('transactions_settlement_status_index');
+                $table->dropColumn('settlement_status');
+            }
+        });
+    }
+};
diff --git a/src/Models/Transaction.php b/src/Models/Transaction.php
index 9956340d..1f1b38f7 100644
--- a/src/Models/Transaction.php
+++ b/src/Models/Transaction.php
@@ -82,6 +82,7 @@ class Transaction extends Model
         'type',
         'direction',
         'status',
+        'settlement_status',
 
         // Monetary (all in smallest currency unit / cents)
         'amount',
@@ -190,6 +191,16 @@ class Transaction extends Model
     public const STATUS_VOIDED    = 'voided';
     public const STATUS_EXPIRED   = 'expired';
 
+    // =========================================================================
+    // Settlement Status Constants
+    // =========================================================================
+
+    public const SETTLEMENT_STATUS_UNPAID             = 'unpaid';
+    public const SETTLEMENT_STATUS_PARTIALLY_PAID     = 'partially_paid';
+    public const SETTLEMENT_STATUS_PAID               = 'paid';
+    public const SETTLEMENT_STATUS_PARTIALLY_REFUNDED = 'partially_refunded';
+    public const SETTLEMENT_STATUS_REFUNDED           = 'refunded';
+
     // =========================================================================
     // Type Constants — Platform-wide taxonomy
     // =========================================================================
@@ -352,6 +363,14 @@ public function scopeFailed($query)
         return $query->where('status', self::STATUS_FAILED);
     }
 
+    /**
+     * Scope to paid or otherwise settled transactions.
+     */
+    public function scopeSettled($query)
+    {
+        return $query->where('settlement_status', self::SETTLEMENT_STATUS_PAID);
+    }
+
     /**
      * Scope to a specific transaction type.
      */
@@ -485,7 +504,34 @@ public function isReversed(): bool
      */
     public function isSettled(): bool
     {
-        return $this->settled_at !== null;
+        return $this->settlement_status === self::SETTLEMENT_STATUS_PAID || $this->settled_at !== null;
+    }
+
+    /**
+     * Whether this transaction has not been settled.
+     */
+    public function isUnpaid(): bool
+    {
+        return $this->settlement_status === self::SETTLEMENT_STATUS_UNPAID;
+    }
+
+    /**
+     * Whether this transaction has been partially settled.
+     */
+    public function isPartiallyPaid(): bool
+    {
+        return $this->settlement_status === self::SETTLEMENT_STATUS_PARTIALLY_PAID;
+    }
+
+    /**
+     * Whether this transaction has been partially or fully refunded.
+     */
+    public function isRefunded(): bool
+    {
+        return in_array($this->settlement_status, [
+            self::SETTLEMENT_STATUS_PARTIALLY_REFUNDED,
+            self::SETTLEMENT_STATUS_REFUNDED,
+        ], true);
     }
 
     /**
diff --git a/src/Services/CustomHttpSmsService.php b/src/Services/CustomHttpSmsService.php
index 6e717357..f683294b 100644
--- a/src/Services/CustomHttpSmsService.php
+++ b/src/Services/CustomHttpSmsService.php
@@ -28,7 +28,9 @@ public function send(string $to, string $text, ?string $from = null, array $opti
         ];
 
         $url     = $this->renderTemplate((string) data_get($this->config, 'url'), $variables);
+        $method  = strtoupper((string) data_get($this->config, 'method', 'POST'));
         $headers = $this->renderTemplateValues((array) data_get($this->config, 'headers', []), $variables);
+        $queryParams = $this->renderTemplateValues((array) data_get($this->config, 'query_params', []), $variables);
         $body    = $this->renderTemplateValues((array) data_get($this->config, 'body', [
             'to'   => '{{to}}',
             'text' => '{{text}}',
@@ -43,7 +45,12 @@ public function send(string $to, string $text, ?string $from = null, array $opti
 
         Log::info('Sending SMS via custom HTTP gateway', ['to' => $to, 'url' => $url]);
 
-        $response = Http::withHeaders($headers)->asJson()->post($url, $body);
+        $request = Http::withHeaders($headers);
+        $response = match ($method) {
+            'GET'   => $request->get($url, $queryParams),
+            'POST'  => $request->asJson()->post($this->appendQueryParams($url, $queryParams), $body),
+            default => throw new \InvalidArgumentException("Unsupported custom HTTP SMS method: {$method}"),
+        };
         $payload  = $response->json();
 
         if ($response->successful()) {
@@ -82,6 +89,11 @@ protected function validateParameters(string $to, string $text): void
         if (empty($text)) {
             throw new \InvalidArgumentException('Message text cannot be empty');
         }
+
+        $method = strtoupper((string) data_get($this->config, 'method', 'POST'));
+        if (!in_array($method, ['GET', 'POST'], true)) {
+            throw new \InvalidArgumentException('Custom HTTP SMS method must be GET or POST');
+        }
     }
 
     protected function renderTemplateValues(array $values, array $variables): array
@@ -105,4 +117,14 @@ protected function renderTemplate(string $template, array $variables): string
 
         return $template;
     }
+
+    protected function appendQueryParams(string $url, array $queryParams = []): string
+    {
+        $queryParams = array_filter($queryParams, static fn ($value) => $value !== null && $value !== '');
+        if (empty($queryParams)) {
+            return $url;
+        }
+
+        return $url . (str_contains($url, '?') ? '&' : '?') . http_build_query($queryParams);
+    }
 }
diff --git a/src/Support/EnvironmentMapper.php b/src/Support/EnvironmentMapper.php
index c6378275..cba68b87 100644
--- a/src/Support/EnvironmentMapper.php
+++ b/src/Support/EnvironmentMapper.php
@@ -52,6 +52,7 @@ class EnvironmentMapper
         'SMPP_PASSWORD'                        => 'services.sms.providers.smpp.password',
         'SMPP_SOURCE_ADDR'                     => 'services.sms.providers.smpp.source_addr',
         'CUSTOM_HTTP_SMS_URL'                  => 'services.sms.providers.custom_http.url',
+        'CUSTOM_HTTP_SMS_METHOD'               => 'services.sms.providers.custom_http.method',
         'CUSTOM_HTTP_SMS_AUTH_HEADER'          => 'services.sms.providers.custom_http.auth_header',
         'CUSTOM_HTTP_SMS_AUTH_TOKEN'           => 'services.sms.providers.custom_http.auth_token',
         'GOOGLE_MAPS_API_KEY'                  => 'services.google_maps.api_key',
diff --git a/tests/Unit/MultiProviderSmsServiceTest.php b/tests/Unit/MultiProviderSmsServiceTest.php
index c05a938f..1f3005f5 100644
--- a/tests/Unit/MultiProviderSmsServiceTest.php
+++ b/tests/Unit/MultiProviderSmsServiceTest.php
@@ -17,6 +17,19 @@
 use Illuminate\Support\Facades\Http;
 use Psr\Log\NullLogger;
 
+if (!function_exists('config')) {
+    function config($key = null, $default = null)
+    {
+        $config = Container::getInstance()->make('config');
+
+        if ($key === null) {
+            return $config;
+        }
+
+        return $config->get($key, $default);
+    }
+}
+
 beforeEach(function () {
     $app = new Container();
 
@@ -55,6 +68,7 @@
                         'source_addr' => 'FLEETBASE',
                     ],
                     'custom_http' => [
+                        'method'      => 'POST',
                         'url'         => 'https://sms-gateway.test/send',
                         'from'        => 'Fleetbase',
                         'auth_header' => 'Authorization',
@@ -62,6 +76,7 @@
                         'headers'     => [
                             'X-Tenant' => 'fleetbase',
                         ],
+                        'query_params' => [],
                         'body' => [
                             'recipient' => '{{to}}',
                             'message'   => '{{text}}',
@@ -150,7 +165,7 @@
     });
 });
 
-test('custom http sms service renders configured templates', function () {
+test('custom http sms service renders configured post templates', function () {
     Http::fake([
         'https://sms-gateway.test/send' => Http::response([
             'message_id' => 'custom-message-id',
@@ -169,7 +184,8 @@
     ]);
 
     Http::assertSent(function ($request) {
-        return $request->url() === 'https://sms-gateway.test/send'
+        return $request->method() === 'POST'
+            && $request->url() === 'https://sms-gateway.test/send'
             && $request->hasHeader('Authorization', 'Bearer token')
             && $request->hasHeader('X-Tenant', 'fleetbase')
             && $request['recipient'] === '+15551234567'
@@ -179,6 +195,57 @@
     });
 });
 
+test('custom http sms service supports get method with rendered query params', function () {
+    Http::fake([
+        'https://sms-gateway.test/send*' => Http::response([
+            'message_id' => 'custom-get-message-id',
+            'status'     => 'queued',
+        ], 200),
+    ]);
+
+    $result = (new CustomHttpSmsService([
+        'method'      => 'GET',
+        'url'         => 'https://sms-gateway.test/send',
+        'from'        => 'Fleetbase',
+        'auth_header' => 'Authorization',
+        'auth_token'  => 'Bearer {{unique_id}}',
+        'headers'     => [
+            'X-Recipient' => '{{to}}',
+        ],
+        'query_params' => [
+            'recipient' => '{{to}}',
+            'message'   => '{{text}}',
+            'sender'    => '{{from}}',
+            'reference' => '{{unique_id}}',
+        ],
+        'body' => [
+            'should_not_send' => '{{text}}',
+        ],
+    ]))->send('+15551234567', 'Hello', null, [
+        'unique_id' => 'custom-get-123',
+    ]);
+
+    expect($result)->toMatchArray([
+        'success'    => true,
+        'message_id' => 'custom-get-message-id',
+        'status'     => 'queued',
+    ]);
+
+    Http::assertSent(function ($request) {
+        parse_str((string) parse_url($request->url(), PHP_URL_QUERY), $query);
+
+        return $request->method() === 'GET'
+            && str_starts_with($request->url(), 'https://sms-gateway.test/send?')
+            && $request->hasHeader('Authorization', 'Bearer custom-get-123')
+            && $request->hasHeader('X-Recipient', '+15551234567')
+            && $query['recipient'] === '+15551234567'
+            && $query['message'] === 'Hello'
+            && $query['sender'] === 'Fleetbase'
+            && $query['reference'] === 'custom-get-123'
+            && !isset($request['should_not_send']);
+    });
+});
+
 test('aws sns sms service publishes to phone number', function () {
     $mock = new MockHandler();
     $mock->append(new Result(['MessageId' => 'sns-message-id']));