diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index 5d9daf752..734681e85 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -9,7 +9,9 @@
         "@hydrooj/common": "workspace:^",
         "@hydrooj/utils": "workspace:^",
         "@opentelemetry/api": "^1.9.0",
+        "@opentelemetry/exporter-trace-otlp-grpc": "^0.208.0",
         "@opentelemetry/exporter-trace-otlp-http": "^0.208.0",
+        "@opentelemetry/exporter-trace-otlp-proto": "^0.208.0",
         "@opentelemetry/sdk-node": "^0.208.0",
         "@zip.js/zip.js": "^2.8.11",
         "cac": "^6.7.14",
diff --git a/packages/hydrojudge/src/config.ts b/packages/hydrojudge/src/config.ts
index 51b2b9f27..d44223fa9 100644
--- a/packages/hydrojudge/src/config.ts
+++ b/packages/hydrojudge/src/config.ts
@@ -33,8 +33,14 @@ export const JudgeSettings = Schema.object({
     secret: Schema.string().description('Judge Token Secret').default(randomstring(32)),
     disable: Schema.boolean().description('Disable builtin judge').default(false),
     tracing: Schema.object({
+        exporter: Schema.union([
+            Schema.const('grpc'),
+            Schema.const('http'),
+            Schema.const('proto'),
+        ]).description('Tracing exporter').default('http'),
         endpoint: Schema.string().role('url').description('Tempo endpoint').default('http://localhost:4318'),
         samplePercentage: Schema.number().description('Sample percentage').default(0).min(0).max(1),
+        attributes: Schema.any().description('Tracing attributes').default({}),
     }),
     detail: Schema.union([
         Schema.const('full'),
diff --git a/packages/hydrojudge/src/daemon.ts b/packages/hydrojudge/src/daemon.ts
index c4b637c48..794da8d01 100644
--- a/packages/hydrojudge/src/daemon.ts
+++ b/packages/hydrojudge/src/daemon.ts
@@ -48,7 +48,14 @@ async function daemon() {
     const shouldRun = await versionCheck((msg) => log.error(msg));
     if (!shouldRun) process.exit(1);
     const tracing = getConfig('tracing');
-    if (tracing?.endpoint && tracing?.samplePercentage) initTracing(tracing.endpoint, tracing.samplePercentage);
+    if (tracing?.endpoint && tracing?.samplePercentage) {
+        initTracing({
+            exporter: tracing.exporter,
+            endpoint: tracing.endpoint,
+            samplePercentage: tracing.samplePercentage,
+            attributes: tracing.attributes,
+        });
+    }
     const _hosts = getConfig('hosts');
     const queue = new PQueue({ concurrency: Infinity });
     await fs.ensureDir(getConfig('tmp_dir'));
diff --git a/packages/hydrojudge/src/hosts/builtin.ts b/packages/hydrojudge/src/hosts/builtin.ts
index a208eb67c..ac311489d 100644
--- a/packages/hydrojudge/src/hosts/builtin.ts
+++ b/packages/hydrojudge/src/hosts/builtin.ts
@@ -60,7 +60,12 @@ export async function apply(ctx: HydroContext) {
     const tracing = getConfig('tracing');
     if (tracing?.endpoint && tracing?.samplePercentage) {
         ctx.effect(() => {
-            const sdk = initTracing(tracing.endpoint, tracing.samplePercentage);
+            const sdk = initTracing({
+                exporter: tracing.exporter,
+                endpoint: tracing.endpoint,
+                samplePercentage: tracing.samplePercentage,
+                attributes: tracing.attributes,
+            });
             return () => sdk.shutdown();
         });
     }
diff --git a/packages/hydrojudge/src/tracing.ts b/packages/hydrojudge/src/tracing.ts
index 788479214..6dcda7001 100644
--- a/packages/hydrojudge/src/tracing.ts
+++ b/packages/hydrojudge/src/tracing.ts
@@ -1,17 +1,39 @@
+import { OTLPTraceExporter as OTLPTraceExporterGrpc } from '@opentelemetry/exporter-trace-otlp-grpc';
 import { OTLPTraceExporter as OTLPTraceExporterHttp } from '@opentelemetry/exporter-trace-otlp-http';
+import { OTLPTraceExporter as OTLPTraceExporterProto } from '@opentelemetry/exporter-trace-otlp-proto';
 import { NodeSDK, resources, tracing } from '@opentelemetry/sdk-node';
 import { Logger } from './log';
 
 const logger = new Logger('tracing');
 
-export function initTracing(endpoint: string, samplePercentage = 1.0) {
-    const traceExporter = new OTLPTraceExporterHttp({
-        url: endpoint.includes('/v1/traces') ? endpoint : `${endpoint}/v1/traces`,
-    });
+interface TracingConfig {
+    exporter?: 'grpc' | 'http' | 'proto';
+    endpoint: string;
+    samplePercentage?: number;
+    attributes?: Record<string, any>;
+}
+
+export function initTracing(config: TracingConfig) {
+    const { endpoint, samplePercentage = 1.0, attributes = {}, exporter = 'http' } = config;
+    let traceExporter;
+    if (exporter === 'grpc') {
+        traceExporter = new OTLPTraceExporterGrpc({
+            url: endpoint,
+        });
+    } else if (exporter === 'proto') {
+        traceExporter = new OTLPTraceExporterProto({
+            url: endpoint,
+        });
+    } else {
+        traceExporter = new OTLPTraceExporterHttp({
+            url: endpoint.includes('/v1/traces') ? endpoint : `${endpoint}/v1/traces`,
+        });
+    }
     const sdk = new NodeSDK({
         resource: resources.resourceFromAttributes({
             'service.name': 'hydrojudge',
             'service.version': require('../package.json').version,
+            ...attributes,
         }),
         traceExporter,
         sampler: new tracing.TraceIdRatioBasedSampler(samplePercentage),