diff --git a/sdk/package.json b/sdk/package.json
index 0e8dae0..fe7c39f 100644
--- a/sdk/package.json
+++ b/sdk/package.json
@@ -5,8 +5,25 @@
   "type": "module",
   "main": "src/signer-sdk.js",
   "module": "src/signer-sdk.js",
+  "types": "src/signer-sdk.d.ts",
+  "exports": {
+    ".": {
+      "types": "./src/signer-sdk.d.ts",
+      "import": "./src/signer-sdk.js",
+      "default": "./src/signer-sdk.js"
+    },
+    "./errors": {
+      "types": "./src/errors.d.ts",
+      "import": "./src/errors.js",
+      "default": "./src/errors.js"
+    }
+  },
+  "files": [
+    "src",
+    "README.md"
+  ],
   "scripts": {
-    "test": "node --test test/signer-sdk.test.js"
+    "test": "node --test test/*.test.js"
   },
   "author": "CyberCore",
   "license": "Proprietary",
diff --git a/sdk/src/errors.d.ts b/sdk/src/errors.d.ts
new file mode 100644
index 0000000..e7bbc6d
--- /dev/null
+++ b/sdk/src/errors.d.ts
@@ -0,0 +1,114 @@
+/**
+ * Definições TypeScript para os erros estruturados do protocolo CCSP/1 (@cybercore/signer-sdk).
+ */
+
+export type CcspErrorCode =
+  | 'AGENT_NOT_RUNNING'
+  | 'COMMUNICATION_ERROR'
+  | 'APPLICATION_NOT_AUTHORIZED'
+  | 'USER_CANCELLED'
+  | 'CERTIFICATE_NOT_FOUND'
+  | 'CERTIFICATE_EXPIRED'
+  | 'CERTIFICATE_INVALID'
+  | 'PRIVATE_KEY_NOT_AVAILABLE'
+  | 'PIN_REQUIRED'
+  | 'PIN_INCORRECT'
+  | 'TOKEN_NOT_FOUND'
+  | 'TOKEN_REMOVED'
+  | 'PKCS11_ERROR'
+  | 'REQUEST_EXPIRED'
+  | 'REPLAY_DETECTED'
+  | 'INVALID_ORIGIN'
+  | 'UNSUPPORTED_ALGORITHM'
+  | 'PROVIDER_NOT_AVAILABLE'
+  | 'SIGNATURE_FAILED'
+  | 'TIMEOUT_ERROR'
+  | 'BAD_REQUEST'
+  | 'SIGN_ERROR'
+  | 'SIGN_PDF_ERROR'
+  | 'SIGN_XML_ERROR'
+  | 'AUTH_ERROR'
+  | 'CONNECTION_FAILED'
+  | string;
+
+export class CyberCoreError extends Error {
+  code: CcspErrorCode;
+  originalError?: unknown;
+  constructor(message: string, code?: CcspErrorCode, originalError?: unknown);
+}
+
+export interface AgentNotRunningOptions {
+  host?: string;
+  port?: number;
+}
+
+export class AgentNotRunningError extends CyberCoreError {
+  host: string;
+  port: number;
+  actionableGuidance: string;
+  constructor(message?: string, options?: AgentNotRunningOptions);
+}
+
+export class ApplicationNotAuthorizedError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class UserCancelledError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class CertificateNotFoundError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class CertificateExpiredError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class CertificateInvalidError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class PrivateKeyNotAvailableError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class PinRequiredError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class PinIncorrectError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class TokenNotFoundError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class RequestExpiredError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class ReplayDetectedError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class InvalidOriginError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class UnsupportedAlgorithmError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class ProviderNotAvailableError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class SignatureFailedError extends CyberCoreError {
+  constructor(message?: string);
+}
+
+export class TimeoutError extends CyberCoreError {
+  constructor(message?: string);
+}
diff --git a/sdk/src/errors.js b/sdk/src/errors.js
index 74067d2..35ea55e 100644
--- a/sdk/src/errors.js
+++ b/sdk/src/errors.js
@@ -12,9 +12,19 @@ export class CyberCoreError extends Error {
 }
 
 export class AgentNotRunningError extends CyberCoreError {
-  constructor(message = 'O agente desktop CyberCore Signer não está em execução ou não foi detectado em 127.0.0.1:21325.') {
+  constructor(
+    message = 'O agente desktop CyberCore Signer não está em execução ou não foi detectado em 127.0.0.1:21325. Certifique-se de que o aplicativo está instalado e aberto na bandeja do sistema (system tray).',
+    options = {}
+  ) {
     super(message, 'AGENT_NOT_RUNNING');
     this.name = 'AgentNotRunningError';
+    this.host = options.host || '127.0.0.1';
+    this.port = options.port || 21325;
+    this.actionableGuidance = [
+      '1. Verifique se o ícone do CyberCore Signer está ativo na barra de tarefas / bandeja do sistema.',
+      '2. Se o aplicativo ainda não estiver instalado, baixe e execute o instalador oficial do CyberCore Signer.',
+      '3. Certifique-se de que a porta local 21325 não está bloqueada por firewall ou softwares antivírus.'
+    ].join('\n');
   }
 }
 
@@ -26,21 +36,42 @@ export class ApplicationNotAuthorizedError extends CyberCoreError {
 }
 
 export class UserCancelledError extends CyberCoreError {
-  constructor(message = 'A operação de assinatura foi cancelada pelo usuário.') {
+  constructor(message = 'A operação de assinatura foi cancelada pelo usuário no diálogo nativo.') {
     super(message, 'USER_CANCELLED');
     this.name = 'UserCancelledError';
   }
 }
 
 export class CertificateNotFoundError extends CyberCoreError {
-  constructor(message = 'Certificado digital não encontrado ou não selecionado.') {
+  constructor(message = 'Certificado digital não encontrado ou não selecionado no agente.') {
     super(message, 'CERTIFICATE_NOT_FOUND');
     this.name = 'CertificateNotFoundError';
   }
 }
 
+export class CertificateExpiredError extends CyberCoreError {
+  constructor(message = 'O certificado digital selecionado expirou e não pode ser utilizado para assinatura.') {
+    super(message, 'CERTIFICATE_EXPIRED');
+    this.name = 'CertificateExpiredError';
+  }
+}
+
+export class CertificateInvalidError extends CyberCoreError {
+  constructor(message = 'O certificado digital é inválido, foi revogado ou possui estrutura X.509 corrompida.') {
+    super(message, 'CERTIFICATE_INVALID');
+    this.name = 'CertificateInvalidError';
+  }
+}
+
+export class PrivateKeyNotAvailableError extends CyberCoreError {
+  constructor(message = 'A chave privada do certificado não está acessível no computador ou o dispositivo físico está ausente.') {
+    super(message, 'PRIVATE_KEY_NOT_AVAILABLE');
+    this.name = 'PrivateKeyNotAvailableError';
+  }
+}
+
 export class PinRequiredError extends CyberCoreError {
-  constructor(message = 'PIN do token ou smart card A3 é obrigatório.') {
+  constructor(message = 'O PIN do token USB ou smart card A3 é obrigatório para autorizar a chave privada.') {
     super(message, 'PIN_REQUIRED');
     this.name = 'PinRequiredError';
   }
@@ -54,14 +85,14 @@ export class PinIncorrectError extends CyberCoreError {
 }
 
 export class TokenNotFoundError extends CyberCoreError {
-  constructor(message = 'Token USB ou smart card não foi detectado no computador.') {
+  constructor(message = 'Token USB ou smart card não foi detectado no computador ou foi removido.') {
     super(message, 'TOKEN_NOT_FOUND');
     this.name = 'TokenNotFoundError';
   }
 }
 
 export class RequestExpiredError extends CyberCoreError {
-  constructor(message = 'A solicitação de assinatura expirou.') {
+  constructor(message = 'A solicitação de assinatura expirou antes de ser processada.') {
     super(message, 'REQUEST_EXPIRED');
     this.name = 'RequestExpiredError';
   }
@@ -73,3 +104,38 @@ export class ReplayDetectedError extends CyberCoreError {
     this.name = 'ReplayDetectedError';
   }
 }
+
+export class InvalidOriginError extends CyberCoreError {
+  constructor(message = 'A origem web solicitante não confere com os domínios homologados para esta aplicação.') {
+    super(message, 'INVALID_ORIGIN');
+    this.name = 'InvalidOriginError';
+  }
+}
+
+export class UnsupportedAlgorithmError extends CyberCoreError {
+  constructor(message = 'O algoritmo criptográfico solicitado não é suportado pelo provedor de certificados.') {
+    super(message, 'UNSUPPORTED_ALGORITHM');
+    this.name = 'UnsupportedAlgorithmError';
+  }
+}
+
+export class ProviderNotAvailableError extends CyberCoreError {
+  constructor(message = 'O provedor criptográfico necessário não está disponível no sistema operacional.') {
+    super(message, 'PROVIDER_NOT_AVAILABLE');
+    this.name = 'ProviderNotAvailableError';
+  }
+}
+
+export class SignatureFailedError extends CyberCoreError {
+  constructor(message = 'Falha durante o cálculo da assinatura digital.') {
+    super(message, 'SIGNATURE_FAILED');
+    this.name = 'SignatureFailedError';
+  }
+}
+
+export class TimeoutError extends CyberCoreError {
+  constructor(message = 'Tempo limite esgotado na comunicação com o agente local.') {
+    super(message, 'TIMEOUT_ERROR');
+    this.name = 'TimeoutError';
+  }
+}
diff --git a/sdk/src/index.d.ts b/sdk/src/index.d.ts
new file mode 100644
index 0000000..b650401
--- /dev/null
+++ b/sdk/src/index.d.ts
@@ -0,0 +1,2 @@
+export * from './signer-sdk.js';
+export { default } from './signer-sdk.js';
diff --git a/sdk/src/signer-sdk.d.ts b/sdk/src/signer-sdk.d.ts
new file mode 100644
index 0000000..f1d3a6d
--- /dev/null
+++ b/sdk/src/signer-sdk.d.ts
@@ -0,0 +1,246 @@
+/**
+ * CyberCore Signer Web SDK (@cybercore/signer-sdk)
+ * Protocolo: CCSP/1 (CyberCore Signing Protocol v1)
+ */
+
+export * from './errors.js';
+
+export interface CyberCoreSignerOptions {
+  /** URL base completa do agente local (prevalece sobre host e port). Ex: 'http://127.0.0.1:21325' */
+  baseUrl?: string;
+  /** Host do agente local (padrão: '127.0.0.1') */
+  host?: string;
+  /** Porta HTTP do agente local (padrão: 21325) */
+  port?: number;
+  /** Timeout padrão para requisições em milissegundos (padrão: 30000) */
+  timeoutMs?: number;
+  /** UUID persistido da aplicação web */
+  applicationId?: string;
+  /** Nome legível da aplicação exibido na confirmação de assinatura */
+  applicationName?: string;
+}
+
+export interface StatusResponse {
+  version: string;
+  status: string;
+  agent_version?: string;
+  os?: string;
+  ready?: boolean;
+  [key: string]: unknown;
+}
+
+export interface VersionInfo {
+  protocolVersion: string;
+  agentVersion: string;
+  os: string;
+}
+
+export interface CapabilitiesResponse {
+  protocolVersion: string;
+  supportedAlgorithms: string[];
+  supportedHashAlgorithms: string[];
+  certificateTypes: ('A1' | 'A3')[];
+  hardwareSupport: string[];
+  padesSupport: boolean;
+  [key: string]: unknown;
+}
+
+export interface CertificateDto {
+  id: string;
+  alias?: string;
+  subject_name: string;
+  cpf_cnpj?: string;
+  issuer_name?: string;
+  serial_number?: string;
+  valid_from?: string;
+  valid_to?: string;
+  certificate_type: 'A1' | 'A3';
+  has_private_key: boolean;
+  key_algorithm?: string;
+  provider_type?: string;
+  [key: string]: unknown;
+}
+
+export interface SignParams {
+  certificateId?: string;
+  certificateHint?: string;
+  digest?: string;
+  data?: string | Uint8Array | ArrayBuffer;
+  algorithm?: 'SHA256withRSA' | 'SHA1withRSA' | string;
+  operation?: 'sign' | string;
+  documentName?: string;
+  fileName?: string;
+  documentType?: string;
+  fileType?: string;
+  purpose?: string;
+  expiresInSeconds?: number;
+}
+
+export interface SignResult {
+  requestId: string;
+  status: 'signed' | 'authenticated';
+  signature: string;
+  certificate: string;
+  certificateChain: string[];
+  algorithm: string;
+  digest: string;
+  subjectName: string | null;
+  subjectCpfCnpj: string | null;
+  documentName: string | null;
+  documentType: string | null;
+}
+
+export interface SignPdfDocumentParams {
+  pdf: string | File | Blob | ArrayBuffer | Uint8Array;
+  certificateId?: string;
+  certificateHint?: string;
+  documentName?: string;
+  fileName?: string;
+  page?: number;
+  pageChoice?: 'LAST_PAGE' | 'FIRST_PAGE' | null;
+  position?: 'BOTTOM_RIGHT' | 'BOTTOM_LEFT' | 'TOP_RIGHT' | 'TOP_LEFT' | 'CUSTOM' | string;
+  x?: number;
+  y?: number;
+  scale?: number;
+  visibleSeal?: boolean;
+  sealThemeId?: string;
+  sealCustom?: Record<string, unknown>;
+  reason?: string;
+  location?: string;
+  cpfDisplayMode?: 'FULL' | 'MASKED' | 'NONE';
+  includeDateTime?: boolean;
+  customExtraInfo?: string;
+  expiresInSeconds?: number;
+}
+
+export interface SignPdfDocumentResult {
+  requestId: string;
+  status: 'signed';
+  signedPdf: string;
+  signed_pdf: string;
+  sha256?: string;
+  signature?: string;
+  certificate: string;
+  certificateChain: string[];
+  algorithm: string;
+  subjectName: string | null;
+  subjectCpfCnpj: string | null;
+  documentName: string;
+  getSignedPdfBlob(): Blob;
+  getSignedPdfBytes(): Uint8Array;
+  download(filename?: string): void;
+}
+
+export interface SignXmlDocumentParams {
+  xml: string | File | Blob | ArrayBuffer;
+  certificateId?: string;
+  certificateHint?: string;
+  profile?: 'XADES_BES' | 'XMLDSIG' | string;
+  targetElementTag?: string;
+  targetElementId?: string;
+  documentName?: string;
+  fileName?: string;
+  algorithm?: string;
+  expiresInSeconds?: number;
+}
+
+export interface SignXmlDocumentResult {
+  requestId: string;
+  status: 'signed';
+  signedXml: string;
+  sha256?: string;
+  signature?: string;
+  certificate: string;
+  certificateChain: string[];
+  algorithm: string;
+  subjectName: string | null;
+  subjectCpfCnpj: string | null;
+  documentName: string;
+  getSignedXmlBlob(): Blob;
+  getSignedXmlBytes(): Uint8Array;
+  download(filename?: string): void;
+}
+
+export interface AuthenticateParams {
+  certificateId?: string;
+  certificateHint?: string;
+  challenge?: string;
+  algorithm?: string;
+  expiresInSeconds?: number;
+}
+
+export interface AuthenticateResult {
+  requestId: string;
+  status: 'authenticated';
+  signature: string;
+  certificate: string;
+  certificateChain: string[];
+  algorithm: string;
+  challenge: string;
+  subjectName: string;
+  subjectCpfCnpj: string;
+}
+
+export interface VerifyParams {
+  signature: string;
+  digest: string;
+  certificate: string;
+}
+
+export interface SealThemesResponse {
+  version: string;
+  status: string;
+  default_seal_id?: string;
+  seals: Array<{ id: string; name: string; [key: string]: unknown }>;
+}
+
+export interface SubjectInfo {
+  name: string;
+  cpfCnpj: string;
+}
+
+export class CyberCoreSigner {
+  baseUrl: string;
+  host: string;
+  port: number;
+  timeoutMs: number;
+  applicationId: string;
+  applicationName: string;
+  connected: boolean;
+
+  constructor(options?: CyberCoreSignerOptions);
+
+  isInstalled(timeoutMs?: number): Promise<boolean>;
+  getStatus(timeoutMs?: number): Promise<StatusResponse>;
+  getVersion(): Promise<VersionInfo>;
+  getCapabilities(): Promise<CapabilitiesResponse>;
+  connect(): Promise<boolean>;
+  getCertificates(): Promise<CertificateDto[]>;
+  sign(params: SignParams): Promise<SignResult>;
+  signFile(file: File | Blob | ArrayBuffer | Uint8Array, options?: Partial<SignParams>): Promise<SignResult>;
+  signPdf(pdfFile: File | Blob | ArrayBuffer | Uint8Array, options?: Partial<SignParams>): Promise<SignResult>;
+  signXml(xmlContent: string | File | Blob | ArrayBuffer, options?: Partial<SignParams>): Promise<SignResult>;
+  getSealThemes(): Promise<SealThemesResponse>;
+  signPdfDocument(params: SignPdfDocumentParams): Promise<SignPdfDocumentResult>;
+  signXmlDocument(params: SignXmlDocumentParams): Promise<SignXmlDocumentResult>;
+  authenticate(options?: AuthenticateParams): Promise<AuthenticateResult>;
+  login(options?: AuthenticateParams): Promise<AuthenticateResult>;
+  extractSubjectInfo(certificateBase64: string): SubjectInfo;
+  verify(params: VerifyParams): Promise<boolean>;
+
+  _fetch(endpoint: string, options?: Record<string, unknown>): Promise<any>;
+  _calculateSha256(data: string | ArrayBuffer | ArrayBufferView): Promise<string>;
+  _throwMappedError(code: string, message?: string): never;
+}
+
+export class PdfStampPicker {
+  constructor(options?: unknown);
+  open(options?: unknown): Promise<unknown>;
+}
+
+export class PdfSealDesigner {
+  constructor(options?: unknown);
+  open(options?: unknown): Promise<unknown>;
+}
+
+export default CyberCoreSigner;
diff --git a/sdk/src/signer-sdk.js b/sdk/src/signer-sdk.js
index 1588c9c..2abbe70 100644
--- a/sdk/src/signer-sdk.js
+++ b/sdk/src/signer-sdk.js
@@ -9,29 +9,66 @@ import {
   ApplicationNotAuthorizedError,
   UserCancelledError,
   CertificateNotFoundError,
+  CertificateExpiredError,
+  CertificateInvalidError,
+  PrivateKeyNotAvailableError,
   PinRequiredError,
   PinIncorrectError,
   TokenNotFoundError,
   RequestExpiredError,
-  ReplayDetectedError
+  ReplayDetectedError,
+  InvalidOriginError,
+  UnsupportedAlgorithmError,
+  ProviderNotAvailableError,
+  SignatureFailedError,
+  TimeoutError
 } from './errors.js';
 
 import { PdfStampPicker } from './pdf-stamp-picker.js';
 import { PdfSealDesigner } from './pdf-seal-designer.js';
 
-export { PdfStampPicker, PdfSealDesigner };
+export {
+  PdfStampPicker,
+  PdfSealDesigner,
+  CyberCoreError,
+  AgentNotRunningError,
+  ApplicationNotAuthorizedError,
+  UserCancelledError,
+  CertificateNotFoundError,
+  CertificateExpiredError,
+  CertificateInvalidError,
+  PrivateKeyNotAvailableError,
+  PinRequiredError,
+  PinIncorrectError,
+  TokenNotFoundError,
+  RequestExpiredError,
+  ReplayDetectedError,
+  InvalidOriginError,
+  UnsupportedAlgorithmError,
+  ProviderNotAvailableError,
+  SignatureFailedError,
+  TimeoutError
+};
 
 export class CyberCoreSigner {
   /**
    * Inicializa o cliente do SDK.
    *
-   * @param {Object} options Configurações do SDK.
-   * @param {string} [options.baseUrl='http://127.0.0.1:21325'] URL base do agente local.
-   * @param {string} [options.applicationId] UUID único da aplicação web (gerado se não fornecido).
+   * @param {Object} [options={}] Configurações do SDK.
+   * @param {string} [options.baseUrl] URL base completa do agente local (prevalece sobre host e port).
+   * @param {string} [options.host='127.0.0.1'] Host do agente local.
+   * @param {number} [options.port=21325] Porta HTTP do agente local.
+   * @param {number} [options.timeoutMs=30000] Timeout padrão das operações em milissegundos.
+   * @param {string} [options.applicationId] UUID único da aplicação web (gerado e persistido se omitido).
    * @param {string} [options.applicationName] Nome legível da aplicação apresentado ao usuário.
    */
   constructor(options = {}) {
-    this.baseUrl = (options.baseUrl || 'http://127.0.0.1:21325').replace(/\/+$/, '');
+    const host = options.host || '127.0.0.1';
+    const port = options.port !== undefined ? options.port : 21325;
+    this.host = host;
+    this.port = port;
+    this.baseUrl = (options.baseUrl || `http://${host}:${port}`).replace(/\/+$/, '');
+    this.timeoutMs = options.timeoutMs !== undefined ? options.timeoutMs : 30000;
     this.applicationId = options.applicationId || this._getOrCreateApplicationId();
     this.applicationName = options.applicationName || (typeof document !== 'undefined' ? document.title : 'Aplicação Web');
     this.connected = false;
@@ -63,8 +100,15 @@ export class CyberCoreSigner {
       const resp = await this._fetch('/ccsp/v1/status', { method: 'GET', timeoutMs });
       return resp;
     } catch (err) {
-      if (err.name === 'AbortError' || err.message?.includes('Failed to fetch') || err.message?.includes('NetworkError')) {
-        throw new AgentNotRunningError();
+      if (
+        err.name === 'AbortError' ||
+        err instanceof TimeoutError ||
+        err instanceof AgentNotRunningError ||
+        err.message?.includes('Failed to fetch') ||
+        err.message?.includes('NetworkError') ||
+        err.code === 'ECONNREFUSED'
+      ) {
+        throw new AgentNotRunningError(undefined, { host: this.host, port: this.port });
       }
       throw err;
     }
@@ -702,7 +746,7 @@ export class CyberCoreSigner {
    */
   async _fetch(endpoint, options = {}) {
     const url = `${this.baseUrl}${endpoint}`;
-    const timeout = options.timeoutMs || 15000;
+    const timeout = options.timeoutMs !== undefined ? options.timeoutMs : (this.timeoutMs || 30000);
     const controller = typeof AbortController !== 'undefined' ? new AbortController() : null;
     const timeoutId = controller ? setTimeout(() => controller.abort(), timeout) : null;
 
@@ -738,12 +782,15 @@ export class CyberCoreSigner {
       return data;
     } catch (err) {
       if (err.name === 'AbortError') {
-        throw new CyberCoreError(`Tempo limite esgotado (${timeout}ms) na comunicação com o agente.`, 'TIMEOUT_ERROR');
+        throw new TimeoutError(`Tempo limite esgotado (${timeout}ms) na comunicação com o agente local.`);
       }
       if (err instanceof CyberCoreError) {
         throw err;
       }
-      throw new AgentNotRunningError(`Falha ao conectar com o CyberCore Signer em ${this.baseUrl}: ${err.message}`);
+      throw new AgentNotRunningError(
+        `Falha ao conectar com o CyberCore Signer em ${this.baseUrl}: ${err.message}`,
+        { host: this.host, port: this.port }
+      );
     } finally {
       if (timeoutId) {
         clearTimeout(timeoutId);
@@ -829,6 +876,12 @@ export class CyberCoreSigner {
         throw new UserCancelledError(message);
       case 'CERTIFICATE_NOT_FOUND':
         throw new CertificateNotFoundError(message);
+      case 'CERTIFICATE_EXPIRED':
+        throw new CertificateExpiredError(message);
+      case 'CERTIFICATE_INVALID':
+        throw new CertificateInvalidError(message);
+      case 'PRIVATE_KEY_NOT_AVAILABLE':
+        throw new PrivateKeyNotAvailableError(message);
       case 'APPLICATION_NOT_AUTHORIZED':
         throw new ApplicationNotAuthorizedError(message);
       case 'PIN_REQUIRED':
@@ -836,11 +889,22 @@ export class CyberCoreSigner {
       case 'PIN_INCORRECT':
         throw new PinIncorrectError(message);
       case 'TOKEN_NOT_FOUND':
+      case 'TOKEN_REMOVED':
         throw new TokenNotFoundError(message);
       case 'REQUEST_EXPIRED':
         throw new RequestExpiredError(message);
       case 'REPLAY_DETECTED':
         throw new ReplayDetectedError(message);
+      case 'INVALID_ORIGIN':
+        throw new InvalidOriginError(message);
+      case 'UNSUPPORTED_ALGORITHM':
+        throw new UnsupportedAlgorithmError(message);
+      case 'PROVIDER_NOT_AVAILABLE':
+        throw new ProviderNotAvailableError(message);
+      case 'SIGNATURE_FAILED':
+        throw new SignatureFailedError(message);
+      case 'TIMEOUT_ERROR':
+        throw new TimeoutError(message);
       default:
         throw new CyberCoreError(message || `Erro do protocolo: ${code}`, code);
     }
diff --git a/sdk/test/mock-server.test.js b/sdk/test/mock-server.test.js
new file mode 100644
index 0000000..30ccd53
--- /dev/null
+++ b/sdk/test/mock-server.test.js
@@ -0,0 +1,256 @@
+import { describe, it, before, after } from 'node:test';
+import assert from 'node:assert/strict';
+import http from 'node:http';
+import {
+  CyberCoreSigner,
+  AgentNotRunningError,
+  ApplicationNotAuthorizedError,
+  CertificateExpiredError,
+  UserCancelledError,
+  TimeoutError
+} from '../src/signer-sdk.js';
+
+describe('@cybercore/signer-sdk - Testes de Integração com Mock HTTP Server', () => {
+  let server;
+  let serverPort;
+  let baseUrl;
+
+  // Servidor Mock HTTP emulando o protocolo CCSP/1
+  before(async () => {
+    server = http.createServer((req, res) => {
+      // CORS & Preflight
+      res.setHeader('Access-Control-Allow-Origin', '*');
+      res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
+      res.setHeader('Access-Control-Allow-Headers', 'Content-Type, X-CyberCore-AppId');
+      res.setHeader('Access-Control-Allow-Private-Network', 'true');
+
+      if (req.method === 'OPTIONS') {
+        res.writeHead(204);
+        res.end();
+        return;
+      }
+
+      let body = '';
+      req.on('data', chunk => { body += chunk; });
+      req.on('end', () => {
+        const url = new URL(req.url, `http://127.0.0.1:${serverPort}`);
+
+        if (url.pathname === '/ccsp/v1/status') {
+          res.writeHead(200, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify({
+            version: '1',
+            status: 'ready',
+            agent_version: '0.1.0',
+            os: 'Linux x86_64'
+          }));
+          return;
+        }
+
+        if (url.pathname === '/ccsp/v1/delay') {
+          // Endpoint propositalmente lento para testar timeout
+          setTimeout(() => {
+            res.writeHead(200, { 'Content-Type': 'application/json' });
+            res.end(JSON.stringify({ status: 'slow_response' }));
+          }, 300);
+          return;
+        }
+
+        if (url.pathname === '/ccsp/v1/authorize') {
+          const payload = JSON.parse(body || '{}');
+          if (payload.application_id === 'blocked-app') {
+            res.writeHead(403, { 'Content-Type': 'application/json' });
+            res.end(JSON.stringify({
+              version: '1',
+              status: 'rejected',
+              error_code: 'APPLICATION_NOT_AUTHORIZED',
+              message: 'Aplicação bloqueada pelo usuário.'
+            }));
+            return;
+          }
+          res.writeHead(200, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify({
+            version: '1',
+            status: 'authorized',
+            application_id: payload.application_id
+          }));
+          return;
+        }
+
+        if (url.pathname === '/ccsp/v1/certificates') {
+          res.writeHead(200, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify({
+            version: '1',
+            status: 'success',
+            certificates: [
+              {
+                id: 'cert-a1-1',
+                alias: 'Certificado A1 Teste',
+                subject_name: 'JOAO DA SILVA:12345678900',
+                certificate_type: 'A1',
+                has_private_key: true
+              }
+            ]
+          }));
+          return;
+        }
+
+        if (url.pathname === '/ccsp/v1/sign') {
+          const payload = JSON.parse(body || '{}');
+          if (payload.certificate_hint === 'expired-cert') {
+            res.writeHead(400, { 'Content-Type': 'application/json' });
+            res.end(JSON.stringify({
+              version: '1',
+              request_id: payload.request_id,
+              status: 'error',
+              error_code: 'CERTIFICATE_EXPIRED',
+              message: 'Certificado expirou em 2025.'
+            }));
+            return;
+          }
+
+          if (payload.certificate_hint === 'cancel-cert') {
+            res.writeHead(400, { 'Content-Type': 'application/json' });
+            res.end(JSON.stringify({
+              version: '1',
+              request_id: payload.request_id,
+              status: 'error',
+              error_code: 'USER_CANCELLED',
+              message: 'Assinatura cancelada no diálogo.'
+            }));
+            return;
+          }
+
+          res.writeHead(200, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify({
+            version: '1',
+            request_id: payload.request_id,
+            status: 'signed',
+            signature: 'MOCK_SIGNATURE_BASE64',
+            certificate: 'MOCK_CERT_BASE64',
+            algorithm: payload.algorithm || 'SHA256withRSA',
+            document_name: payload.document_name
+          }));
+          return;
+        }
+
+        res.writeHead(404, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ error_code: 'NOT_FOUND', message: 'Endpoint não encontrado' }));
+      });
+    });
+
+    await new Promise((resolve, reject) => {
+      server.listen(0, '127.0.0.1', () => {
+        serverPort = server.address().port;
+        baseUrl = `http://127.0.0.1:${serverPort}`;
+        resolve();
+      });
+      server.on('error', reject);
+    });
+  });
+
+  after(async () => {
+    if (server) {
+      await new Promise(resolve => server.close(resolve));
+    }
+  });
+
+  it('deve confirmar que o agente está ativo com isInstalled()', async () => {
+    const signer = new CyberCoreSigner({ baseUrl });
+    const installed = await signer.isInstalled();
+    assert.equal(installed, true);
+  });
+
+  it('deve retornar dados de status corretos em getStatus()', async () => {
+    const signer = new CyberCoreSigner({ baseUrl });
+    const status = await signer.getStatus();
+    assert.equal(status.version, '1');
+    assert.equal(status.status, 'ready');
+    assert.equal(status.agent_version, '0.1.0');
+  });
+
+  it('deve realizar handshake com connect() com sucesso', async () => {
+    const signer = new CyberCoreSigner({ baseUrl, applicationName: 'ERP Teste' });
+    const connected = await signer.connect();
+    assert.equal(connected, true);
+    assert.equal(signer.connected, true);
+  });
+
+  it('deve lançar ApplicationNotAuthorizedError se o agente rejeitar autorização', async () => {
+    const signer = new CyberCoreSigner({ baseUrl, applicationId: 'blocked-app' });
+    await assert.rejects(
+      async () => signer.connect(),
+      ApplicationNotAuthorizedError
+    );
+  });
+
+  it('deve listar certificados disponíveis em getCertificates()', async () => {
+    const signer = new CyberCoreSigner({ baseUrl });
+    const certs = await signer.getCertificates();
+    assert.ok(Array.isArray(certs));
+    assert.equal(certs.length, 1);
+    assert.equal(certs[0].id, 'cert-a1-1');
+  });
+
+  it('deve assinar com sucesso via sign()', async () => {
+    const signer = new CyberCoreSigner({ baseUrl });
+    const result = await signer.sign({
+      certificateId: 'cert-a1-1',
+      digest: Buffer.alloc(32, 7).toString('base64'),
+      documentName: 'relatorio.pdf'
+    });
+
+    assert.equal(result.status, 'signed');
+    assert.equal(result.signature, 'MOCK_SIGNATURE_BASE64');
+    assert.equal(result.documentName, 'relatorio.pdf');
+  });
+
+  it('deve tratar erro CERTIFICATE_EXPIRED lançando CertificateExpiredError', async () => {
+    const signer = new CyberCoreSigner({ baseUrl });
+    await assert.rejects(
+      async () => signer.sign({
+        certificateId: 'expired-cert',
+        digest: Buffer.alloc(32, 1).toString('base64')
+      }),
+      CertificateExpiredError
+    );
+  });
+
+  it('deve tratar cancelamento de usuário lançando UserCancelledError', async () => {
+    const signer = new CyberCoreSigner({ baseUrl });
+    await assert.rejects(
+      async () => signer.sign({
+        certificateId: 'cancel-cert',
+        digest: Buffer.alloc(32, 2).toString('base64')
+      }),
+      UserCancelledError
+    );
+  });
+
+  it('deve lançar TimeoutError quando a chamada exceder o timeoutMs configurado', async () => {
+    const signer = new CyberCoreSigner({ baseUrl, timeoutMs: 50 });
+    await assert.rejects(
+      async () => signer._fetch('/ccsp/v1/delay'),
+      TimeoutError
+    );
+  });
+
+  it('deve lançar AgentNotRunningError com mensagem acionável se porta estiver inativa', async () => {
+    // Porta inativa aleatória
+    const deadPort = 64999;
+    const signer = new CyberCoreSigner({ host: '127.0.0.1', port: deadPort });
+
+    const installed = await signer.isInstalled(300);
+    assert.equal(installed, false);
+
+    await assert.rejects(
+      async () => signer.getStatus(300),
+      err => {
+        assert.ok(err instanceof AgentNotRunningError);
+        assert.equal(err.code, 'AGENT_NOT_RUNNING');
+        assert.equal(err.port, deadPort);
+        assert.ok(err.actionableGuidance.includes('bandeja do sistema'));
+        return true;
+      }
+    );
+  });
+});
diff --git a/sdk/test/signer-sdk.test.js b/sdk/test/signer-sdk.test.js
index 0c4453e..a54d22a 100644
--- a/sdk/test/signer-sdk.test.js
+++ b/sdk/test/signer-sdk.test.js
@@ -3,10 +3,22 @@ import assert from 'node:assert/strict';
 import { CyberCoreSigner } from '../src/signer-sdk.js';
 import {
   CyberCoreError,
+  AgentNotRunningError,
   UserCancelledError,
   CertificateNotFoundError,
+  CertificateExpiredError,
+  CertificateInvalidError,
+  PrivateKeyNotAvailableError,
+  PinRequiredError,
   PinIncorrectError,
   TokenNotFoundError,
+  RequestExpiredError,
+  ReplayDetectedError,
+  InvalidOriginError,
+  UnsupportedAlgorithmError,
+  ProviderNotAvailableError,
+  SignatureFailedError,
+  TimeoutError,
   ApplicationNotAuthorizedError
 } from '../src/errors.js';
 
@@ -25,12 +37,25 @@ describe('@cybercore/signer-sdk - Testes Unitários do SDK', () => {
     const signer = new CyberCoreSigner({
       baseUrl: 'http://127.0.0.1:21325/',
       applicationId: customAppId,
-      applicationName: 'Portal Minha Empresa'
+      applicationName: 'Portal Minha Empresa',
+      timeoutMs: 45000
     });
 
     assert.equal(signer.baseUrl, 'http://127.0.0.1:21325');
     assert.equal(signer.applicationId, customAppId);
     assert.equal(signer.applicationName, 'Portal Minha Empresa');
+    assert.equal(signer.timeoutMs, 45000);
+  });
+
+  it('deve montar baseUrl automaticamente quando host e port forem especificados', () => {
+    const signer = new CyberCoreSigner({
+      host: 'localhost',
+      port: 29999
+    });
+
+    assert.equal(signer.host, 'localhost');
+    assert.equal(signer.port, 29999);
+    assert.equal(signer.baseUrl, 'http://localhost:29999');
   });
 
   it('deve retornar as capacidades criptográficas do agente em getCapabilities()', async () => {
@@ -69,6 +94,26 @@ describe('@cybercore/signer-sdk - Testes Unitários do SDK', () => {
       CertificateNotFoundError
     );
 
+    assert.throws(
+      () => signer._throwMappedError('CERTIFICATE_EXPIRED', 'Certificado expirado'),
+      CertificateExpiredError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('CERTIFICATE_INVALID', 'Certificado inválido'),
+      CertificateInvalidError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('PRIVATE_KEY_NOT_AVAILABLE', 'Sem chave privada'),
+      PrivateKeyNotAvailableError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('PIN_REQUIRED', 'PIN obrigatório'),
+      PinRequiredError
+    );
+
     assert.throws(
       () => signer._throwMappedError('PIN_INCORRECT', 'PIN errado'),
       PinIncorrectError
@@ -79,6 +124,46 @@ describe('@cybercore/signer-sdk - Testes Unitários do SDK', () => {
       TokenNotFoundError
     );
 
+    assert.throws(
+      () => signer._throwMappedError('TOKEN_REMOVED', 'Token removido'),
+      TokenNotFoundError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('REQUEST_EXPIRED', 'Expirou'),
+      RequestExpiredError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('REPLAY_DETECTED', 'Replay'),
+      ReplayDetectedError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('INVALID_ORIGIN', 'Origem inválida'),
+      InvalidOriginError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('UNSUPPORTED_ALGORITHM', 'Algoritmo inválido'),
+      UnsupportedAlgorithmError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('PROVIDER_NOT_AVAILABLE', 'Provider indisponível'),
+      ProviderNotAvailableError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('SIGNATURE_FAILED', 'Falha na assinatura'),
+      SignatureFailedError
+    );
+
+    assert.throws(
+      () => signer._throwMappedError('TIMEOUT_ERROR', 'Timeout'),
+      TimeoutError
+    );
+
     assert.throws(
       () => signer._throwMappedError('APPLICATION_NOT_AUTHORIZED', 'Não autorizada'),
       ApplicationNotAuthorizedError
@@ -90,6 +175,16 @@ describe('@cybercore/signer-sdk - Testes Unitários do SDK', () => {
     );
   });
 
+  it('deve fornecer orientação acionável rica em AgentNotRunningError', () => {
+    const err = new AgentNotRunningError(undefined, { host: '127.0.0.1', port: 21325 });
+    assert.equal(err.code, 'AGENT_NOT_RUNNING');
+    assert.equal(err.host, '127.0.0.1');
+    assert.equal(err.port, 21325);
+    assert.ok(err.actionableGuidance.includes('bandeja do sistema'));
+    assert.ok(err.actionableGuidance.includes('instalador oficial'));
+    assert.ok(err.actionableGuidance.includes('21325'));
+  });
+
   it('deve validar parâmetros obrigatórios no método sign()', async () => {
     const signer = new CyberCoreSigner();