diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 785211a..3f77fa6 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -157,54 +157,77 @@ jobs:
 
       # Publish in dependency order: types -> core -> all others
       - name: Publish @logtide/types
+        continue-on-error: true
         working-directory: packages/types
         run: pnpm publish --no-git-checks --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
 
       - name: Publish @logtide/core
+        continue-on-error: true
         working-directory: packages/core
         run: pnpm publish --no-git-checks --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
 
       - name: Publish @logtide/sdk-node
+        continue-on-error: true
         working-directory: packages/node
         run: pnpm publish --no-git-checks --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
 
+      - name: Publish @logtide/express
+        continue-on-error: true
+        working-directory: packages/express
+        run: pnpm publish --no-git-checks --access public
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
+
+      - name: Publish @logtide/fastify
+        continue-on-error: true
+        working-directory: packages/fastify
+        run: pnpm publish --no-git-checks --access public
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
+
       - name: Publish @logtide/nextjs
+        continue-on-error: true
         working-directory: packages/nextjs
         run: pnpm publish --no-git-checks --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
 
       - name: Publish @logtide/nuxt
+        continue-on-error: true
         working-directory: packages/nuxt
         run: pnpm publish --no-git-checks --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
 
       - name: Publish @logtide/sveltekit
+        continue-on-error: true
         working-directory: packages/sveltekit
         run: pnpm publish --no-git-checks --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
 
       - name: Publish @logtide/hono
+        continue-on-error: true
         working-directory: packages/hono
         run: pnpm publish --no-git-checks --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
 
       - name: Publish @logtide/angular
+        continue-on-error: true
         working-directory: packages/angular
         run: pnpm publish --no-git-checks --access public
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_SECRET }}
 
       - name: Publish @logtide/elysia
+        continue-on-error: true
         working-directory: packages/elysia
         run: pnpm publish --no-git-checks --access public
         env:
@@ -222,6 +245,8 @@ jobs:
           echo "| @logtide/types | \`npm i @logtide/types@${VERSION}\` |" >> $GITHUB_STEP_SUMMARY
           echo "| @logtide/core | \`npm i @logtide/core@${VERSION}\` |" >> $GITHUB_STEP_SUMMARY
           echo "| @logtide/sdk-node | \`npm i @logtide/sdk-node@${VERSION}\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| @logtide/express | \`npm i @logtide/express@${VERSION}\` |" >> $GITHUB_STEP_SUMMARY
+          echo "| @logtide/fastify | \`npm i @logtide/fastify@${VERSION}\` |" >> $GITHUB_STEP_SUMMARY
           echo "| @logtide/nextjs | \`npm i @logtide/nextjs@${VERSION}\` |" >> $GITHUB_STEP_SUMMARY
           echo "| @logtide/nuxt | \`npm i @logtide/nuxt@${VERSION}\` |" >> $GITHUB_STEP_SUMMARY
           echo "| @logtide/sveltekit | \`npm i @logtide/sveltekit@${VERSION}\` |" >> $GITHUB_STEP_SUMMARY
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c695236..43fb355 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,29 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.6] - 2026-02-08
+
+### Changed
+
+#### DSN Simplified
+- Removed redundant `projectId` from DSN format — the API key already embeds the project ID
+- New DSN format: `https://lp_APIKEY@host` (legacy format with path still accepted for backward compatibility)
+- Added `apiUrl` + `apiKey` as alternative to DSN string (backward compatible with `@logtide/sdk-node` config format)
+- Added `resolveDSN()` helper that accepts either `dsn` or `apiUrl` + `apiKey`
+- Removed `projectId` field from `DSN` interface (`@logtide/types`)
+- Removed `X-Project-Id` header from `LogtideHttpTransport` and `OtlpHttpTransport` (`@logtide/core`)
+
+#### Dynamic Service Name
+- `service` in `ClientOptions` is now **optional** — each framework package defaults to its own name (`'express'`, `'fastify'`, `'hono'`, `'elysia'`, `'nextjs'`, `'sveltekit'`, `'nuxt'`, `'angular'`)
+- Added `service?: string` field and `setService()` method to `Scope` — allows overriding service name per-request or per-module
+- Service resolution chain: `scope.service` → `options.service` → framework default → `'unknown'`
+
+#### Mock Server
+- Removed `X-Project-Id` from CORS headers and request tracking
+
+#### Documentation
+- Updated DSN format examples across all package READMEs
+
 ## [0.5.5] - 2026-02-07
 
 ### Added
@@ -77,4 +100,5 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Root README with package table, architecture diagram, development guide
 - Branch protection documentation (`.github/BRANCH_PROTECTION.md`)
 
+[0.5.6]: https://github.com/logtide-dev/logtide-javascript/releases/tag/v0.5.6
 [0.5.5]: https://github.com/logtide-dev/logtide-javascript/releases/tag/v0.5.5
diff --git a/README.md b/README.md
index 1349a04..1a7e992 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,14 @@ npm install @logtide/elysia    # Elysia
 ```typescript
 // Every integration follows the same pattern:
 {
-  dsn: 'https://lp_your_key@your-logtide-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-logtide-instance.com',
+  service: 'my-app',
+}
+
+// Or use apiUrl + apiKey separately:
+{
+  apiUrl: 'https://your-logtide-instance.com',
+  apiKey: 'lp_your_key',
   service: 'my-app',
 }
 ```
diff --git a/package.json b/package.json
index 0d8aead..eb9c908 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "private": true,
-  "version": "0.5.5",
+  "version": "0.5.6",
   "scripts": {
     "build": "pnpm -r --filter @logtide/* build",
     "test": "pnpm -r --filter @logtide/* test",
diff --git a/packages/angular/README.md b/packages/angular/README.md
index 1327aae..bad6cfe 100644
--- a/packages/angular/README.md
+++ b/packages/angular/README.md
@@ -52,7 +52,10 @@ export const appConfig: ApplicationConfig = {
   providers: [
     provideHttpClient(withInterceptorsFromDi()),
     provideLogtide({
-      dsn: 'https://lp_your_key@your-instance.com/project-id',
+      dsn: 'https://lp_your_key@your-instance.com',
+      // Or use apiUrl + apiKey instead of dsn:
+      // apiUrl: 'https://your-instance.com',
+      // apiKey: 'lp_your_key',
       service: 'my-angular-app',
       environment: 'production',
     }),
@@ -72,7 +75,8 @@ import { getLogtideProviders } from '@logtide/angular';
   imports: [HttpClientModule],
   providers: [
     ...getLogtideProviders({
-      dsn: 'https://lp_your_key@your-instance.com/project-id',
+      dsn: 'https://lp_your_key@your-instance.com',
+      // Or: apiUrl + apiKey instead of dsn
       service: 'my-angular-app',
     }),
   ],
diff --git a/packages/angular/package.json b/packages/angular/package.json
index b51e1a0..3820129 100644
--- a/packages/angular/package.json
+++ b/packages/angular/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/angular",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "LogTide SDK integration for Angular — ErrorHandler, HTTP Interceptor, trace propagation",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/angular/src/provide.ts b/packages/angular/src/provide.ts
index 01cd2e1..78b4f4f 100644
--- a/packages/angular/src/provide.ts
+++ b/packages/angular/src/provide.ts
@@ -33,6 +33,7 @@ export function provideLogtide(options: ClientOptions): EnvironmentProviders {
       useFactory: () => {
         return () => {
           hub.init({
+            service: 'angular',
             ...options,
             integrations: [
               new GlobalErrorIntegration(),
@@ -72,6 +73,7 @@ export function getLogtideProviders(options: ClientOptions): Provider[] {
       useFactory: () => {
         return () => {
           hub.init({
+            service: 'angular',
             ...options,
             integrations: [
               new GlobalErrorIntegration(),
diff --git a/packages/core/README.md b/packages/core/README.md
index dd42b75..bad173d 100644
--- a/packages/core/README.md
+++ b/packages/core/README.md
@@ -49,7 +49,10 @@ import { hub } from '@logtide/core';
 
 // Initialize once
 hub.init({
-  dsn: 'https://lp_your_key@your-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-instance.com',
+  // Or use apiUrl + apiKey instead of dsn:
+  // apiUrl: 'https://your-instance.com',
+  // apiKey: 'lp_your_key',
   service: 'my-app',
 });
 
@@ -81,7 +84,10 @@ process.on('SIGTERM', () => hub.close());
 import { LogtideClient } from '@logtide/core';
 
 const client = new LogtideClient({
-  dsn: 'https://lp_your_key@your-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-instance.com',
+  // Or use apiUrl + apiKey instead of dsn:
+  // apiUrl: 'https://your-instance.com',
+  // apiKey: 'lp_your_key',
   service: 'my-app',
 });
 
diff --git a/packages/core/package.json b/packages/core/package.json
index 1591560..06beb10 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/core",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "Core client, hub, scope, transports, and utilities for the LogTide SDK",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/core/src/client.ts b/packages/core/src/client.ts
index 3d44ebd..efe6f26 100644
--- a/packages/core/src/client.ts
+++ b/packages/core/src/client.ts
@@ -8,7 +8,7 @@ import type {
   Span,
   Transport,
 } from '@logtide/types';
-import { parseDSN } from './dsn';
+import { resolveDSN } from './dsn';
 import { Scope } from './scope';
 import { SpanManager, type StartSpanOptions } from './span-manager';
 import { BreadcrumbBuffer } from './breadcrumb-buffer';
@@ -26,7 +26,7 @@ class DefaultTransport implements Transport {
   private spanTransport: BatchTransport;
 
   constructor(options: ClientOptions) {
-    const dsn = parseDSN(options.dsn);
+    const dsn = resolveDSN(options);
 
     this.logTransport = new BatchTransport({
       inner: new LogtideHttpTransport(dsn),
@@ -41,7 +41,7 @@ class DefaultTransport implements Transport {
     });
 
     this.spanTransport = new BatchTransport({
-      inner: new OtlpHttpTransport(dsn, options.service),
+      inner: new OtlpHttpTransport(dsn, options.service || 'unknown'),
       batchSize: options.batchSize,
       flushInterval: options.flushInterval,
       maxBufferSize: options.maxBufferSize,
@@ -103,7 +103,7 @@ export class LogtideClient implements IClient {
     return this._isInitialized;
   }
 
-  get service(): string {
+  get service(): string | undefined {
     return this.options.service;
   }
 
@@ -115,6 +115,10 @@ export class LogtideClient implements IClient {
     return this.options.release;
   }
 
+  private resolveService(scope?: Scope): string {
+    return scope?.service || this.options.service || 'unknown';
+  }
+
   // ─── Logging ───────────────────────────────────────────
 
   captureLog(
@@ -124,7 +128,7 @@ export class LogtideClient implements IClient {
     scope?: Scope,
   ): void {
     const entry: InternalLogEntry = {
-      service: this.options.service,
+      service: this.resolveService(scope),
       level: level as LogLevel,
       message,
       time: new Date().toISOString(),
diff --git a/packages/core/src/dsn.ts b/packages/core/src/dsn.ts
index fec484a..430e996 100644
--- a/packages/core/src/dsn.ts
+++ b/packages/core/src/dsn.ts
@@ -1,24 +1,21 @@
-import type { DSN } from '@logtide/types';
+import type { ClientOptions, DSN } from '@logtide/types';
 
 /**
  * Parse a LogTide DSN string into its components.
- * Format: https://lp_APIKEY@host/PROJECT_ID
+ * Format: https://lp_APIKEY@host
+ * Legacy format with path (https://lp_APIKEY@host/PROJECT_ID) is also accepted; the path is ignored.
  */
 export function parseDSN(dsn: string): DSN {
   try {
     const url = new URL(dsn);
     const apiKey = url.username;
-    const projectId = url.pathname.replace(/^\//, '');
     const apiUrl = `${url.protocol}//${url.host}`;
 
     if (!apiKey) {
       throw new Error('Missing API key in DSN');
     }
-    if (!projectId) {
-      throw new Error('Missing project ID in DSN');
-    }
 
-    return { apiUrl, apiKey, projectId };
+    return { apiUrl, apiKey };
   } catch (err) {
     if (err instanceof Error && err.message.startsWith('Missing')) {
       throw err;
@@ -26,3 +23,20 @@ export function parseDSN(dsn: string): DSN {
     throw new Error(`Invalid DSN: ${dsn}`);
   }
 }
+
+/**
+ * Resolve a DSN from ClientOptions.
+ * Accepts either a `dsn` string or separate `apiUrl` + `apiKey` fields.
+ */
+export function resolveDSN(options: ClientOptions): DSN {
+  if (options.dsn) {
+    return parseDSN(options.dsn);
+  }
+  if (options.apiUrl && options.apiKey) {
+    return {
+      apiUrl: options.apiUrl.replace(/\/$/, ''),
+      apiKey: options.apiKey,
+    };
+  }
+  throw new Error('Either "dsn" or both "apiUrl" and "apiKey" must be provided');
+}
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index 3232db6..ed1ce83 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -23,7 +23,7 @@ export { SpanManager, type StartSpanOptions } from './span-manager';
 export { BreadcrumbBuffer } from './breadcrumb-buffer';
 
 // DSN
-export { parseDSN } from './dsn';
+export { parseDSN, resolveDSN } from './dsn';
 
 // Transports
 export { LogtideHttpTransport } from './transport/logtide-http';
diff --git a/packages/core/src/scope.ts b/packages/core/src/scope.ts
index 8fcea94..2ff5e65 100644
--- a/packages/core/src/scope.ts
+++ b/packages/core/src/scope.ts
@@ -5,6 +5,7 @@ import { BreadcrumbBuffer } from './breadcrumb-buffer';
 export class Scope {
   traceId: string;
   spanId?: string;
+  service?: string;
   tags: Record<string, string> = {};
   extras: Record<string, unknown> = {};
   private breadcrumbs: BreadcrumbBuffer;
@@ -15,6 +16,11 @@ export class Scope {
     this.breadcrumbs = new BreadcrumbBuffer(maxBreadcrumbs);
   }
 
+  setService(service: string): this {
+    this.service = service;
+    return this;
+  }
+
   setTag(key: string, value: string): this {
     this.tags[key] = value;
     return this;
@@ -51,6 +57,7 @@ export class Scope {
   clone(): Scope {
     const scope = new Scope(this.traceId);
     scope.spanId = this.spanId;
+    scope.service = this.service;
     scope.tags = { ...this.tags };
     scope.extras = { ...this.extras };
     for (const bc of this.breadcrumbs.getAll()) {
diff --git a/packages/core/src/transport/logtide-http.ts b/packages/core/src/transport/logtide-http.ts
index e73f435..3dcac2a 100644
--- a/packages/core/src/transport/logtide-http.ts
+++ b/packages/core/src/transport/logtide-http.ts
@@ -15,7 +15,6 @@ export class LogtideHttpTransport implements Transport {
       headers: {
         'Content-Type': 'application/json',
         'X-API-Key': this.dsn.apiKey,
-        'X-Project-Id': this.dsn.projectId,
       },
       body: JSON.stringify({ logs }),
     });
diff --git a/packages/core/src/transport/otlp-http.ts b/packages/core/src/transport/otlp-http.ts
index 57e1cfa..973ee70 100644
--- a/packages/core/src/transport/otlp-http.ts
+++ b/packages/core/src/transport/otlp-http.ts
@@ -69,7 +69,6 @@ export class OtlpHttpTransport implements Transport {
       headers: {
         'Content-Type': 'application/json',
         'X-API-Key': this.dsn.apiKey,
-        'X-Project-Id': this.dsn.projectId,
       },
       body: JSON.stringify(payload),
     });
diff --git a/packages/core/tests/dsn.test.ts b/packages/core/tests/dsn.test.ts
index 3b72b6a..b96c202 100644
--- a/packages/core/tests/dsn.test.ts
+++ b/packages/core/tests/dsn.test.ts
@@ -1,40 +1,49 @@
 import { describe, it, expect } from 'vitest';
-import { parseDSN } from '../src/dsn';
+import { parseDSN, resolveDSN } from '../src/dsn';
 
 describe('parseDSN', () => {
-  it('should parse a valid DSN', () => {
+  it('should parse a DSN without path (new format)', () => {
+    const result = parseDSN('https://lp_abc123@api.logtide.dev');
+    expect(result).toEqual({
+      apiUrl: 'https://api.logtide.dev',
+      apiKey: 'lp_abc123',
+    });
+  });
+
+  it('should accept legacy DSN with project ID path and ignore it', () => {
     const result = parseDSN('https://lp_abc123@api.logtide.dev/my-project');
     expect(result).toEqual({
       apiUrl: 'https://api.logtide.dev',
       apiKey: 'lp_abc123',
-      projectId: 'my-project',
     });
   });
 
   it('should handle DSN with port', () => {
-    const result = parseDSN('https://lp_key@localhost:3000/proj1');
+    const result = parseDSN('https://lp_key@localhost:3000');
     expect(result).toEqual({
       apiUrl: 'https://localhost:3000',
       apiKey: 'lp_key',
-      projectId: 'proj1',
     });
   });
 
   it('should handle http scheme', () => {
-    const result = parseDSN('http://lp_key@localhost/project');
+    const result = parseDSN('http://lp_key@localhost');
     expect(result).toEqual({
       apiUrl: 'http://localhost',
       apiKey: 'lp_key',
-      projectId: 'project',
     });
   });
 
-  it('should throw on missing API key', () => {
-    expect(() => parseDSN('https://api.logtide.dev/project')).toThrow('Missing API key');
+  it('should handle DSN with trailing slash', () => {
+    const result = parseDSN('https://lp_key@api.logtide.dev/');
+    expect(result).toEqual({
+      apiUrl: 'https://api.logtide.dev',
+      apiKey: 'lp_key',
+    });
   });
 
-  it('should throw on missing project ID', () => {
-    expect(() => parseDSN('https://lp_key@api.logtide.dev/')).toThrow('Missing project ID');
+  it('should throw on missing API key', () => {
+    expect(() => parseDSN('https://api.logtide.dev/project')).toThrow('Missing API key');
   });
 
   it('should throw on invalid DSN string', () => {
@@ -45,3 +54,57 @@ describe('parseDSN', () => {
     expect(() => parseDSN('')).toThrow('Invalid DSN');
   });
 });
+
+describe('resolveDSN', () => {
+  it('should resolve from dsn string', () => {
+    const result = resolveDSN({ dsn: 'https://lp_key@api.logtide.dev' });
+    expect(result).toEqual({
+      apiUrl: 'https://api.logtide.dev',
+      apiKey: 'lp_key',
+    });
+  });
+
+  it('should resolve from apiUrl + apiKey', () => {
+    const result = resolveDSN({ apiUrl: 'http://localhost:8080', apiKey: 'lp_test_key' });
+    expect(result).toEqual({
+      apiUrl: 'http://localhost:8080',
+      apiKey: 'lp_test_key',
+    });
+  });
+
+  it('should strip trailing slash from apiUrl', () => {
+    const result = resolveDSN({ apiUrl: 'http://localhost:8080/', apiKey: 'lp_key' });
+    expect(result).toEqual({
+      apiUrl: 'http://localhost:8080',
+      apiKey: 'lp_key',
+    });
+  });
+
+  it('should prefer dsn over apiUrl + apiKey when both provided', () => {
+    const result = resolveDSN({
+      dsn: 'https://lp_dsn_key@api.logtide.dev',
+      apiUrl: 'http://localhost:8080',
+      apiKey: 'lp_other_key',
+    });
+    expect(result).toEqual({
+      apiUrl: 'https://api.logtide.dev',
+      apiKey: 'lp_dsn_key',
+    });
+  });
+
+  it('should throw when neither dsn nor apiUrl+apiKey provided', () => {
+    expect(() => resolveDSN({})).toThrow('Either "dsn" or both "apiUrl" and "apiKey" must be provided');
+  });
+
+  it('should throw when only apiUrl provided without apiKey', () => {
+    expect(() => resolveDSN({ apiUrl: 'http://localhost:8080' })).toThrow(
+      'Either "dsn" or both "apiUrl" and "apiKey" must be provided',
+    );
+  });
+
+  it('should throw when only apiKey provided without apiUrl', () => {
+    expect(() => resolveDSN({ apiKey: 'lp_key' })).toThrow(
+      'Either "dsn" or both "apiUrl" and "apiKey" must be provided',
+    );
+  });
+});
diff --git a/packages/elysia/README.md b/packages/elysia/README.md
index e7354cd..0e45fab 100644
--- a/packages/elysia/README.md
+++ b/packages/elysia/README.md
@@ -47,7 +47,10 @@ import { logtide } from '@logtide/elysia';
 
 const app = new Elysia()
   .use(logtide({
-    dsn: 'https://lp_your_key@your-instance.com/project-id',
+    dsn: 'https://lp_your_key@your-instance.com',
+    // Or use apiUrl + apiKey instead of dsn:
+    // apiUrl: 'https://your-instance.com',
+    // apiKey: 'lp_your_key',
     service: 'my-elysia-api',
     environment: 'production',
   }))
diff --git a/packages/elysia/package.json b/packages/elysia/package.json
index bb0b149..f0c61f4 100644
--- a/packages/elysia/package.json
+++ b/packages/elysia/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/elysia",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "LogTide SDK plugin for Elysia — request tracing and error capture via lifecycle hooks",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/elysia/src/plugin.ts b/packages/elysia/src/plugin.ts
index ae70dcb..42f6cd7 100644
--- a/packages/elysia/src/plugin.ts
+++ b/packages/elysia/src/plugin.ts
@@ -27,6 +27,7 @@ export interface LogtideElysiaOptions extends ClientOptions {}
  */
 export function logtide(options: LogtideElysiaOptions) {
   hub.init({
+    service: 'elysia',
     ...options,
     integrations: [
       new ConsoleIntegration(),
diff --git a/packages/express/README.md b/packages/express/README.md
index 4e94457..b0ee878 100644
--- a/packages/express/README.md
+++ b/packages/express/README.md
@@ -48,7 +48,10 @@ import { logtide } from '@logtide/express';
 const app = express();
 
 app.use(logtide({
-  dsn: 'https://lp_your_key@your-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-instance.com',
+  // Or use apiUrl + apiKey instead of dsn:
+  // apiUrl: 'https://your-instance.com',
+  // apiKey: 'lp_your_key',
   service: 'my-express-api',
   environment: 'production',
 }));
diff --git a/packages/express/package.json b/packages/express/package.json
index ec36df5..814895a 100644
--- a/packages/express/package.json
+++ b/packages/express/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/express",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "LogTide SDK middleware for Express — request tracing and error capture",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/express/src/middleware.ts b/packages/express/src/middleware.ts
index e26a108..f32bfc0 100644
--- a/packages/express/src/middleware.ts
+++ b/packages/express/src/middleware.ts
@@ -35,6 +35,7 @@ declare global {
  */
 export function logtide(options: LogtideExpressOptions) {
   hub.init({
+    service: 'express',
     ...options,
     integrations: [
       new ConsoleIntegration(),
diff --git a/packages/fastify/README.md b/packages/fastify/README.md
index 1f3a509..4dd339c 100644
--- a/packages/fastify/README.md
+++ b/packages/fastify/README.md
@@ -48,7 +48,10 @@ import { logtide } from '@logtide/fastify';
 const app = Fastify();
 
 await app.register(logtide, {
-  dsn: 'https://lp_your_key@your-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-instance.com',
+  // Or use apiUrl + apiKey instead of dsn:
+  // apiUrl: 'https://your-instance.com',
+  // apiKey: 'lp_your_key',
   service: 'my-fastify-api',
   environment: 'production',
 });
diff --git a/packages/fastify/package.json b/packages/fastify/package.json
index 39b9ed6..4729653 100644
--- a/packages/fastify/package.json
+++ b/packages/fastify/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/fastify",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "LogTide SDK plugin for Fastify — request tracing and error capture",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/fastify/src/middleware.ts b/packages/fastify/src/middleware.ts
index 7f97936..97147f8 100644
--- a/packages/fastify/src/middleware.ts
+++ b/packages/fastify/src/middleware.ts
@@ -35,6 +35,7 @@ declare module 'fastify' {
 export const logtide = fp(
   (fastify: FastifyInstance, options: LogtideFastifyOptions, done: (err?: Error) => void) => {
     hub.init({
+      service: 'fastify',
       ...options,
       integrations: [
         new ConsoleIntegration(),
diff --git a/packages/hono/README.md b/packages/hono/README.md
index 52e02a8..b9bfc31 100644
--- a/packages/hono/README.md
+++ b/packages/hono/README.md
@@ -48,7 +48,10 @@ import { logtide } from '@logtide/hono';
 const app = new Hono();
 
 app.use('*', logtide({
-  dsn: 'https://lp_your_key@your-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-instance.com',
+  // Or use apiUrl + apiKey instead of dsn:
+  // apiUrl: 'https://your-instance.com',
+  // apiKey: 'lp_your_key',
   service: 'my-hono-api',
   environment: 'production',
 }));
diff --git a/packages/hono/package.json b/packages/hono/package.json
index 80ba470..d8d9318 100644
--- a/packages/hono/package.json
+++ b/packages/hono/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/hono",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "LogTide SDK middleware for Hono — request tracing and error capture",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/hono/src/middleware.ts b/packages/hono/src/middleware.ts
index 6f80cae..99f88a8 100644
--- a/packages/hono/src/middleware.ts
+++ b/packages/hono/src/middleware.ts
@@ -26,6 +26,7 @@ export interface LogtideHonoOptions extends ClientOptions {}
  */
 export function logtide(options: LogtideHonoOptions) {
   hub.init({
+    service: 'hono',
     ...options,
     integrations: [
       new ConsoleIntegration(),
diff --git a/packages/nextjs/README.md b/packages/nextjs/README.md
index 646a048..10e7329 100644
--- a/packages/nextjs/README.md
+++ b/packages/nextjs/README.md
@@ -51,7 +51,10 @@ import { registerLogtide, captureRequestError } from '@logtide/nextjs/server';
 
 export async function register() {
   await registerLogtide({
-    dsn: 'https://lp_your_key@your-instance.com/project-id',
+    dsn: 'https://lp_your_key@your-instance.com',
+    // Or use apiUrl + apiKey instead of dsn:
+    // apiUrl: 'https://your-instance.com',
+    // apiKey: 'lp_your_key',
     service: 'my-nextjs-app',
     environment: process.env.NODE_ENV,
   });
@@ -72,7 +75,10 @@ import { useEffect } from 'react';
 import { initLogtide, trackNavigation } from '@logtide/nextjs/client';
 
 initLogtide({
-  dsn: 'https://lp_your_key@your-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-instance.com',
+  // Or use apiUrl + apiKey instead of dsn:
+  // apiUrl: 'https://your-instance.com',
+  // apiKey: 'lp_your_key',
   service: 'my-nextjs-app',
 });
 
@@ -99,7 +105,7 @@ Initialize LogTide in Next.js `instrumentation.ts`. Automatically installs `Cons
 import { registerLogtide } from '@logtide/nextjs/server';
 
 await registerLogtide({
-  dsn: 'https://lp_key@host/project',
+  dsn: 'https://lp_key@host',
   service: 'my-app',
   environment: 'production',
   release: '1.0.0',
@@ -156,7 +162,7 @@ Initialize LogTide on the client side. Installs `GlobalErrorIntegration` for `un
 import { initLogtide } from '@logtide/nextjs/client';
 
 initLogtide({
-  dsn: 'https://lp_key@host/project',
+  dsn: 'https://lp_key@host',
   service: 'my-app',
 });
 ```
diff --git a/packages/nextjs/package.json b/packages/nextjs/package.json
index 989e60d..7e0017f 100644
--- a/packages/nextjs/package.json
+++ b/packages/nextjs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/nextjs",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "LogTide SDK integration for Next.js — auto error capture, request tracing, and performance spans",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/nextjs/src/client/index.ts b/packages/nextjs/src/client/index.ts
index 491f9bd..0f7eaea 100644
--- a/packages/nextjs/src/client/index.ts
+++ b/packages/nextjs/src/client/index.ts
@@ -17,6 +17,7 @@ export { trackNavigation } from './navigation';
  */
 export function initLogtide(options: ClientOptions): void {
   hub.init({
+    service: 'nextjs',
     ...options,
     integrations: [
       new GlobalErrorIntegration(),
diff --git a/packages/nextjs/src/server/index.ts b/packages/nextjs/src/server/index.ts
index 5e0e7ff..1ff8179 100644
--- a/packages/nextjs/src/server/index.ts
+++ b/packages/nextjs/src/server/index.ts
@@ -21,6 +21,7 @@ export { instrumentRequest, finishRequest } from './request-handler';
  */
 export async function registerLogtide(options: ClientOptions): Promise<void> {
   hub.init({
+    service: 'nextjs',
     ...options,
     integrations: [
       new ConsoleIntegration(),
diff --git a/packages/nuxt/README.md b/packages/nuxt/README.md
index cc69e9b..d32ab31 100644
--- a/packages/nuxt/README.md
+++ b/packages/nuxt/README.md
@@ -49,7 +49,10 @@ export default defineNuxtConfig({
   modules: ['@logtide/nuxt'],
 
   logtide: {
-    dsn: 'https://lp_your_key@your-instance.com/project-id',
+    dsn: 'https://lp_your_key@your-instance.com',
+    // Or use apiUrl + apiKey instead of dsn:
+    // apiUrl: 'https://your-instance.com',
+    // apiKey: 'lp_your_key',
     service: 'my-nuxt-app',
     environment: 'production',
     release: '1.0.0',
diff --git a/packages/nuxt/package.json b/packages/nuxt/package.json
index 018097c..1e1ef73 100644
--- a/packages/nuxt/package.json
+++ b/packages/nuxt/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/nuxt",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "LogTide SDK integration for Nuxt — auto error capture, request tracing via Nitro hooks",
   "type": "module",
   "main": "./dist/module.cjs",
diff --git a/packages/nuxt/src/module.ts b/packages/nuxt/src/module.ts
index 03268bf..b54d476 100644
--- a/packages/nuxt/src/module.ts
+++ b/packages/nuxt/src/module.ts
@@ -11,7 +11,7 @@ export default defineNuxtModule<ModuleOptions>({
   },
   defaults: {
     dsn: '',
-    service: 'nuxt-app',
+    service: 'nuxt',
   },
   setup(options, nuxt) {
     if (!options.dsn) {
diff --git a/packages/nuxt/src/runtime/client-plugin.ts b/packages/nuxt/src/runtime/client-plugin.ts
index 102db37..7a0fce2 100644
--- a/packages/nuxt/src/runtime/client-plugin.ts
+++ b/packages/nuxt/src/runtime/client-plugin.ts
@@ -7,7 +7,7 @@ import { defineNuxtPlugin, useRuntimeConfig } from '#app';
 export default defineNuxtPlugin((nuxtApp) => {
   const config = useRuntimeConfig().public.logtide as {
     dsn: string;
-    service: string;
+    service?: string;
     environment?: string;
     release?: string;
     debug?: boolean;
@@ -17,7 +17,7 @@ export default defineNuxtPlugin((nuxtApp) => {
 
   hub.init({
     dsn: config.dsn,
-    service: config.service,
+    service: config.service ?? 'nuxt',
     environment: config.environment,
     release: config.release,
     debug: config.debug,
diff --git a/packages/nuxt/src/runtime/server-plugin.ts b/packages/nuxt/src/runtime/server-plugin.ts
index da48d5a..5dd9e50 100644
--- a/packages/nuxt/src/runtime/server-plugin.ts
+++ b/packages/nuxt/src/runtime/server-plugin.ts
@@ -13,7 +13,7 @@ import { defineNitroPlugin, getRequestURL, getRequestHeaders } from 'h3';
 export default defineNitroPlugin((nitroApp) => {
   const config = useRuntimeConfig().logtide as {
     dsn: string;
-    service: string;
+    service?: string;
     environment?: string;
     release?: string;
     debug?: boolean;
@@ -23,7 +23,7 @@ export default defineNitroPlugin((nitroApp) => {
 
   hub.init({
     dsn: config.dsn,
-    service: config.service,
+    service: config.service ?? 'nuxt',
     environment: config.environment,
     release: config.release,
     debug: config.debug,
diff --git a/packages/sveltekit/README.md b/packages/sveltekit/README.md
index 4640338..655f1e9 100644
--- a/packages/sveltekit/README.md
+++ b/packages/sveltekit/README.md
@@ -48,7 +48,10 @@ yarn add @logtide/sveltekit
 import { logtideHandle, logtideHandleError, logtideHandleFetch } from '@logtide/sveltekit/server';
 
 export const handle = logtideHandle({
-  dsn: 'https://lp_your_key@your-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-instance.com',
+  // Or use apiUrl + apiKey instead of dsn:
+  // apiUrl: 'https://your-instance.com',
+  // apiKey: 'lp_your_key',
   service: 'my-sveltekit-app',
   environment: 'production',
 });
@@ -65,7 +68,8 @@ export const handleFetch = logtideHandleFetch();
 import { initLogtide } from '@logtide/sveltekit/client';
 
 initLogtide({
-  dsn: 'https://lp_your_key@your-instance.com/project-id',
+  dsn: 'https://lp_your_key@your-instance.com',
+  // Or: apiUrl + apiKey instead of dsn
   service: 'my-sveltekit-app',
 });
 ```
diff --git a/packages/sveltekit/package.json b/packages/sveltekit/package.json
index 611eb3c..0b5dc4f 100644
--- a/packages/sveltekit/package.json
+++ b/packages/sveltekit/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/sveltekit",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "LogTide SDK integration for SvelteKit — handle, handleError, handleFetch hooks",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/sveltekit/src/server/index.ts b/packages/sveltekit/src/server/index.ts
index 1c8c79b..f8e0a08 100644
--- a/packages/sveltekit/src/server/index.ts
+++ b/packages/sveltekit/src/server/index.ts
@@ -48,6 +48,7 @@ interface HandleFetchInput {
  */
 export function logtideHandle(options: ClientOptions) {
   hub.init({
+    service: 'sveltekit',
     ...options,
     integrations: [
       new ConsoleIntegration(),
diff --git a/packages/types/README.md b/packages/types/README.md
index edee688..3b2a5db 100644
--- a/packages/types/README.md
+++ b/packages/types/README.md
@@ -87,8 +87,8 @@ import type { ClientOptions, DSN } from '@logtide/types';
 
 | Type | Description |
 |------|-------------|
-| `ClientOptions` | Full configuration: DSN, service, batching, retry, circuit breaker, etc. |
-| `DSN` | Parsed DSN with `apiUrl`, `apiKey`, `projectId` |
+| `ClientOptions` | Full configuration: DSN (or `apiUrl` + `apiKey`), service, batching, retry, circuit breaker, etc. |
+| `DSN` | Parsed DSN with `apiUrl`, `apiKey` |
 
 ---
 
diff --git a/packages/types/package.json b/packages/types/package.json
index 9d4e6aa..64ea3da 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@logtide/types",
-  "version": "0.5.5",
+  "version": "0.5.6",
   "description": "Shared type definitions for the LogTide SDK ecosystem",
   "type": "module",
   "main": "./dist/index.cjs",
diff --git a/packages/types/src/client-options.ts b/packages/types/src/client-options.ts
index 6276c2e..c14c698 100644
--- a/packages/types/src/client-options.ts
+++ b/packages/types/src/client-options.ts
@@ -4,14 +4,17 @@ import type { Transport } from './transport';
 export interface DSN {
   apiUrl: string;
   apiKey: string;
-  projectId: string;
 }
 
 export interface ClientOptions {
-  /** DSN string: https://lp_APIKEY@api.logtide.dev/PROJECT_ID */
-  dsn: string;
-  /** Service name for log attribution */
-  service: string;
+  /** DSN string: https://lp_APIKEY@api.logtide.dev */
+  dsn?: string;
+  /** API base URL (alternative to DSN, e.g. 'http://localhost:8080') */
+  apiUrl?: string;
+  /** API key (alternative to DSN, e.g. 'lp_your_api_key_here') */
+  apiKey?: string;
+  /** Service name for log attribution (optional, defaults to framework name) */
+  service?: string;
   /** Environment (e.g. production, staging) */
   environment?: string;
   /** Release / version identifier */
diff --git a/test-apps/mock-server/src/server.ts b/test-apps/mock-server/src/server.ts
index 969676e..aecad90 100644
--- a/test-apps/mock-server/src/server.ts
+++ b/test-apps/mock-server/src/server.ts
@@ -30,7 +30,6 @@ export interface MockServerState {
   requests: Array<{
     timestamp: number;
     apiKey: string | null;
-    projectId: string | null;
     endpoint: string;
     count: number;
   }>;
@@ -59,7 +58,7 @@ export function createMockServer() {
     // CORS
     res.setHeader('Access-Control-Allow-Origin', '*');
     res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
-    res.setHeader('Access-Control-Allow-Headers', 'Content-Type, X-API-Key, X-Project-Id');
+    res.setHeader('Access-Control-Allow-Headers', 'Content-Type, X-API-Key');
 
     if (method === 'OPTIONS') {
       res.writeHead(204);
@@ -69,7 +68,6 @@ export function createMockServer() {
 
     try {
       const apiKey = req.headers['x-api-key'] as string | undefined;
-      const projectId = req.headers['x-project-id'] as string | undefined;
 
       // Ingest endpoint - receives logs from SDK
       if (url.pathname === '/api/v1/ingest' && method === 'POST') {
@@ -81,7 +79,6 @@ export function createMockServer() {
         state.requests.push({
           timestamp: Date.now(),
           apiKey: apiKey ?? null,
-          projectId: projectId ?? null,
           endpoint: '/api/v1/ingest',
           count: logs.length,
         });
@@ -118,7 +115,6 @@ export function createMockServer() {
         state.requests.push({
           timestamp: Date.now(),
           apiKey: apiKey ?? null,
-          projectId: projectId ?? null,
           endpoint: '/v1/otlp/traces',
           count: spans.length,
         });