> ## Documentation Index > Fetch the complete documentation index at: https://trustos.telefonicatech.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Create Asset > Creates a digital asset. ## OpenAPI ````yaml post /assets openapi: 3.0.1 info: title: TrustOS EVM Track API description: >- TrustOS EVM Track API is used to interact with EVM based blockchain networks. In case you have some questions or need more about the use of this API, don't hesitate to contact B-Team: contact: name: Blockchain Team email: soporte-bteam@telefonica.com version: 2.2.2 servers: - url: https://lab.trustos.telefonicatech.com/track/v2 description: Lab security: [] tags: - name: Asset Creation description: Digital asset creation endpoints. - name: Asset Management description: All about the digital asset lifecycle. - name: Utils description: Methods for specific use cases. paths: /assets: post: tags: - Asset Creation summary: Create an asset. parameters: - name: networkId in: query description: Network identifier where the evidence will be registered. required: true schema: type: number example: 10004 requestBody: description: Data needed for the creation of an asset. content: application/json: schema: type: object properties: assetId: type: string description: Identifier of the asset. example: asset-test-01 data: type: object description: Immutable data of the asset. example: id: A2839RP version: '1' metadata: type: object description: Metadata related to the asset. example: color: red position: x: '23.34' 'y': '-24.22' required: - assetId - data - metadata required: true responses: '201': $ref: '#/components/responses/201-AssetCreated' '400': $ref: '#/components/responses/400-ValidationError' '401': $ref: '#/components/responses/401-AuthenticationError' '403': $ref: '#/components/responses/403-ForbiddenError' '409': $ref: '#/components/responses/409-ExistingAssetError' '429': $ref: '#/components/responses/429-OutOfCreditsError' '500': $ref: '#/components/responses/500-InternalServerError' security: - bearerAuth: [] components: responses: 201-AssetCreated: description: Successful asset creation. content: application/json: schema: type: object properties: statusCode: type: number description: Request status code. example: 201 message: type: string description: Message returned by the request. example: Asset created data: $ref: '#/components/schemas/ReturnedAsset' 400-ValidationError: description: Validation error. content: application/json: schema: type: object properties: statusCode: type: number description: Request status code. example: 400 type: type: string description: Error type. example: Validation Error message: type: string description: Message returned by the request. example: Request parameters are wrong, check requirements errors: type: array description: All the validation errors encountered in the request. items: type: object properties: field: type: string description: Name of the field. example: '' error: type: string description: Description of the error encountered. example: '' 401-AuthenticationError: description: Authentication error. content: application/json: schema: type: object properties: statusCode: type: number description: Request status code. example: 401 type: type: string description: Error type. example: Authentication Error message: type: string description: Message returned by the request. example: Token is not provided 403-ForbiddenError: description: Forbidden error. content: application/json: schema: type: object properties: statusCode: type: number description: Request status code. example: 403 type: type: string description: Type of the error. example: Forbidden Error message: type: string description: Message returned by the request. example: This certificate requires a PIN, please provide it 409-ExistingAssetError: description: Existing Asset Error. content: application/json: schema: type: object properties: statusCode: type: number description: Request status code. example: 409 type: type: string description: Error type. example: Existing Asset Error message: type: string description: Message returned by the request. example: >- The provided assetId is already registered, please try again with a different one 429-OutOfCreditsError: description: Out of credits error. content: application/json: schema: type: object properties: statusCode: type: number description: Request status code. example: 429 type: type: string description: Type of the error. example: Out of Credits Error message: type: string description: Message returned by the request. example: >- User has run out of credits. Please, contact BTeam to increase the limit 500-InternalServerError: description: Internal server error. content: application/json: schema: type: object properties: statusCode: type: number description: Request status code. example: 500 type: type: string description: Error type. example: Internal Server Error message: type: string description: Message returned by the request. example: Oops! Something went wrong, please try again later schemas: ReturnedAsset: type: object properties: trackID: type: string description: Global identifier of the asset. example: did:trustos:trackid: assetId: type: string description: Identifier of the asset. example: asset-test-01 data: type: object description: Immutable data of the asset. properties: id: type: string example: A2839RP version: type: string example: '1' networkId: type: number description: Network identifier where the evidence was registered. example: 10004 assetHash: type: string description: Hash of assetId and data properties. example: 6c253e352981fabaf6ba78a301cd116320010a13abe8abf8428eaedcee7ddabd transactions: type: array description: Transactions of the asset. items: type: object properties: metadata: type: object description: Metadata of the last transaction. properties: color: type: string example: red position: type: object properties: x: type: string example: '23.34' 'y': type: string example: '-24.22' timestamp: type: integer description: Timestamp of the transaction. example: 1711538908 userOwner: type: string description: Identifier of the user owner of the asset. example: did:user:{issuer} hash: type: string description: Hash of metadata, timestamp and userOwner properties. example: >- 456fc02752e48108af8548b4544c3ab6deb30d091567cff0b5d69a3beda5678d smartContract: type: string description: smart contract where the evidence was registered. example: '0xabcdbcbff5fa05e060e7dfe3e608cba010d11abc' transactionHash: type: string description: Identifier of the transaction in the Blockchain network. example: >- 0x456dbcbff5fa05e060e7dfe3e608cba010d112c75ffbc6531a09b2a1351b3452 securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT ````