diff --git a/src/commands/iascable-build.ts b/src/commands/iascable-build.ts
index d8908c2..7af0683 100644
--- a/src/commands/iascable-build.ts
+++ b/src/commands/iascable-build.ts
@@ -4,7 +4,7 @@ import {promises} from 'fs';
 import {default as jsYaml} from 'js-yaml';
 import {dirname, join} from 'path';
 
-import {IascableInput} from './inputs/iascable.input';
+import {IascableBuild} from './inputs/iascable.input';
 import {CommandLineInput} from './inputs/command-line.input';
 import {BillOfMaterialModel, isTileConfig, OutputFile, TerraformComponent, Tile} from '../models';
 import {
@@ -79,7 +79,7 @@ export const builder = (yargs: Argv<any>) => {
     });
 };
 
-export const handler = async (argv: Arguments<IascableInput & CommandLineInput>) => {
+export const handler = async (argv: Arguments<IascableBuild & CommandLineInput>) => {
   process.env.LOG_LEVEL = argv.debug ? 'debug' : 'info';
 
   const cmd: IascableApi = Container.get(IascableApi);
@@ -107,7 +107,7 @@ export const handler = async (argv: Arguments<IascableInput & CommandLineInput>)
   }
 };
 
-function buildCatalogBuilderOptions(input: IascableInput): IascableOptions {
+function buildCatalogBuilderOptions(input: IascableBuild): IascableOptions {
   const tileConfig = {
     label: input.tileLabel,
     name: input.name,
diff --git a/src/commands/iascable-validate.ts b/src/commands/iascable-validate.ts
new file mode 100644
index 0000000..d6a580a
--- /dev/null
+++ b/src/commands/iascable-validate.ts
@@ -0,0 +1,71 @@
+import {Container} from 'typescript-ioc';
+import {Arguments, Argv} from 'yargs';
+import {promises} from 'fs';
+import {default as jsYaml} from 'js-yaml';
+import {dirname, join} from 'path';
+
+import {IascableBuild, IascableValidate} from './inputs/iascable.input';
+import {CommandLineInput} from './inputs/command-line.input';
+import {BillOfMaterialModel, isTileConfig, OutputFile, TerraformComponent, Tile} from '../models';
+import {
+  IascableApi,
+  IascableOptions,
+  IascableResult,
+  loadBillOfMaterialFromFile,
+  loadReferenceBom
+} from '../services';
+import {LoggerApi} from '../util/logger';
+import {isUndefined} from '../util/object-util';
+
+export const command = 'validate';
+export const desc = 'Validate the provided bill of material against the catalog';
+export const builder = (yargs: Argv<any>) => {
+  return yargs
+    .option('catalogUrl', {
+      alias: 'u',
+      description: 'The url of the module catalog. Can be https:// or file:/ protocol.',
+      default: 'https://cloud-native-toolkit.github.io/garage-terraform-modules/index.yaml'
+    })
+    .option('input', {
+      alias: 'i',
+      description: 'The path to the bill of materials to use as input',
+      conflicts: 'reference',
+      demandOption: false,
+    })
+    .option('reference', {
+      alias: 'r',
+      description: 'The reference BOM to use for the build',
+      conflicts: 'input',
+      demandOption: false,
+    })
+    .option('debug', {
+      type: 'boolean',
+      describe: 'Flag to turn on more detailed output message',
+    });
+};
+
+export const handler = async (argv: Arguments<IascableValidate & CommandLineInput>) => {
+  process.env.LOG_LEVEL = argv.debug ? 'debug' : 'info';
+
+  const cmd: IascableApi = Container.get(IascableApi);
+  const logger: LoggerApi = Container.get(LoggerApi).child('build');
+
+  const bom: BillOfMaterialModel | undefined = argv.reference
+    ? await loadReferenceBom(argv.reference, '')
+    : await loadBillOfMaterialFromFile(argv.input, '');
+
+  if (isUndefined(bom)) {
+    console.log('No BOM found to validate!');
+    return;
+  }
+
+  const name = bom?.metadata?.name || 'component';
+  console.log('Validating:', name);
+
+  const results = await cmd.validate(argv.catalogUrl, bom);
+
+  console.log('Results:');
+  results.forEach(result => {
+    console.log('  Module: ', result);
+  })
+};
diff --git a/src/commands/inputs/iascable.input.ts b/src/commands/inputs/iascable.input.ts
index 3ff6c35..91bcc7a 100644
--- a/src/commands/inputs/iascable.input.ts
+++ b/src/commands/inputs/iascable.input.ts
@@ -1,8 +1,11 @@
 
-export interface IascableInput {
+export interface IascableValidate {
   catalogUrl: string;
   input?: string;
   reference?: string;
+}
+
+export interface IascableBuild extends IascableValidate{
   ci: boolean;
   prompt: boolean;
   platform?: string;
diff --git a/src/services/iascable.api.ts b/src/services/iascable.api.ts
index 0da9352..2b037b2 100644
--- a/src/services/iascable.api.ts
+++ b/src/services/iascable.api.ts
@@ -14,4 +14,5 @@ export interface IascableOptions {
 
 export abstract class IascableApi {
   abstract build(catalogUrl: string, input?: BillOfMaterialModel, options?: IascableOptions): Promise<IascableResult>;
+  abstract validate(catalogUrl: string, input: BillOfMaterialModel): Promise<Array<string | Error>>;
 }
diff --git a/src/services/iascable.impl.ts b/src/services/iascable.impl.ts
index d3aace8..99c87f3 100644
--- a/src/services/iascable.impl.ts
+++ b/src/services/iascable.impl.ts
@@ -48,4 +48,10 @@ export class CatalogBuilder implements IascableApi {
       tile,
     };
   }
+
+  async validate(catalogUrl: string, input: BillOfMaterialModel): Promise<Array<string | Error>> {
+    const catalog: Catalog = await this.loader.loadCatalog(catalogUrl);
+
+    return this.moduleSelector.validateBillOfMaterial(catalog, input);
+  }
 }
diff --git a/src/services/module-selector/module-selector.api.ts b/src/services/module-selector/module-selector.api.ts
index 1654546..86d3c80 100644
--- a/src/services/module-selector/module-selector.api.ts
+++ b/src/services/module-selector/module-selector.api.ts
@@ -1,9 +1,15 @@
 import {CatalogModel} from '../catalog-loader';
-import {BillOfMaterialModel} from '../../models/bill-of-material.model';
+import {BillOfMaterialModel, BillOfMaterialModule} from '../../models/bill-of-material.model';
 import {SingleModuleVersion} from '../../models/module.model';
 
 export abstract class ModuleSelectorApi {
-  abstract buildBillOfMaterial(fullCatalog: CatalogModel, input?: BillOfMaterialModel, filter?: {platform?: string, provider?: string}): Promise<BillOfMaterialModel>;
+  abstract buildBillOfMaterial(fullCatalog: CatalogModel, input?: BillOfMaterialModel, filter?: { platform?: string, provider?: string }): Promise<BillOfMaterialModel>;
+
   abstract resolveBillOfMaterial(fullCatalog: CatalogModel, input: BillOfMaterialModel): Promise<SingleModuleVersion[]>;
-  abstract validateBillOfMaterialModuleConfigYaml(fullCatalog: CatalogModel, moduleRef: string, yaml: string): Promise<void>;
+
+  abstract validateBillOfMaterialModuleConfigYaml(fullCatalog: CatalogModel, moduleRef: string, yaml: string): Promise<string>;
+
+  abstract validateBillOfMaterial(catalogModel: CatalogModel, bom: BillOfMaterialModel): Promise<Array<string | Error>>;
+
+  abstract validateBillOfMaterialModuleConfig(catalogModel: CatalogModel, moduleConfig: BillOfMaterialModule): Promise<string>;
 }
diff --git a/src/services/module-selector/module-selector.impl.ts b/src/services/module-selector/module-selector.impl.ts
index 141de30..9709b12 100644
--- a/src/services/module-selector/module-selector.impl.ts
+++ b/src/services/module-selector/module-selector.impl.ts
@@ -20,6 +20,7 @@ import {QuestionBuilderImpl} from '../../util/question-builder/question-builder.
 import {LoggerApi} from '../../util/logger';
 import {BillOfMaterialModuleConfigError, ModuleNotFound} from '../../errors';
 import {of as arrayOf} from '../../util/array-util';
+import {isDefinedAndNotNull, isUndefined} from '../../util/object-util';
 
 export class ModuleSelector implements ModuleSelectorApi {
   logger: LoggerApi;
@@ -133,9 +134,30 @@ export class ModuleSelector implements ModuleSelectorApi {
     return new SelectedModules(fullCatalog).resolveModules(modules);
   }
 
-  async validateBillOfMaterialModuleConfigYaml(catalogModel: CatalogModel, moduleRef: string, yaml: string) {
+  async validateBillOfMaterialModuleConfigYaml(catalogModel: CatalogModel, moduleRef: string, yaml: string): Promise<string> {
+    const moduleConfig: BillOfMaterialModule = jsYaml.load(yaml) as any;
+
+    return this.validateBillOfMaterialModuleConfig(catalogModel, moduleConfig);
+  }
+
+  async validateBillOfMaterial(catalogModel: CatalogModel, bom: BillOfMaterialModel): Promise<Array<string | Error>> {
+    const result = Promise
+      .all(BillOfMaterial.getModules(bom).map(m => {
+        return this.validateBillOfMaterialModuleConfig(catalogModel, m);
+      }))
+      .then((result: Array<string | Error>) => result.filter(isDefinedAndNotNull));
+
+    return result;
+  }
+
+  async validateBillOfMaterialModuleConfig(catalogModel: CatalogModel, moduleConfig: BillOfMaterialModule): Promise<string> {
     const fullCatalog: Catalog = Catalog.fromModel(catalogModel);
 
+    const moduleRef: string | undefined = moduleConfig.name || moduleConfig.id;
+    if (isUndefined(moduleRef)) {
+      throw new ModuleNotFound('unknown');
+    }
+
     const module: Module | undefined = fullCatalog.lookupModule({id: moduleRef, name: moduleRef});
     if (!module) {
       throw new ModuleNotFound(moduleRef);
@@ -148,7 +170,6 @@ export class ModuleSelector implements ModuleSelectorApi {
       .map(v => v.id)
       .asArray();
 
-    const moduleConfig: BillOfMaterialModule = jsYaml.load(yaml) as any;
     const unmatchedVariableNames: string[] = arrayOf(moduleConfig.variables)
       .filter(v => !availableVariableNames.includes(v.name))
       .map(v => v.name)
@@ -161,6 +182,8 @@ export class ModuleSelector implements ModuleSelectorApi {
     if (unmatchedVariableNames.length > 0 || unmatchedDependencyNames.length > 0) {
       throw new BillOfMaterialModuleConfigError({unmatchedVariableNames, unmatchedDependencyNames, availableVariableNames, availableDependencyNames});
     }
+
+    return moduleRef;
   }
 }