Simply put: instead of manually entering an API, preparing technical calls, or interpreting complex responses, you can ask the assistant something like:<\/p>\n
Valida este email: antxon.pous@gmail.com\n<\/code><\/pre>\nor:<\/p>\n
Valida este n\u00famero de tel\u00e9fono: 34677934019\n<\/code><\/pre>\nor even:<\/p>\n
He subido un fichero con emails. Los emails est\u00e1n en la primera columna. Val\u00eddalos.\n<\/code><\/pre>\nThe wizard uses the Verify Emails MCP service, runs the validation, and returns a natural language response.<\/p>\n
The service is available at:<\/p>\n
https:\/\/mcp.apinombres.workers.dev\/\n<\/code><\/pre>\nAnd the primary MCP endpoint is:<\/p>\n
https:\/\/mcp.apinombres.workers.dev\/mcp\n<\/code><\/pre>\nThis is the endpoint that is configured in ChatGPT, Claude, or any MCP-compatible client.<\/p>\n
What is MCP VerifyEmails for?<\/h2>\n
The service is used to validate data from a chat<\/strong>.<\/p>\nIt allows you to check emails, phone numbers, names, addresses and complete files. It also allows you to check the available credits in the VerificarEmails account. <\/p>\n
This is useful for cleaning databases, reviewing contacts, validating leads, checking phone numbers before campaigns, detecting false data in forms or verifying entire files without leaving the AI assistant.<\/p>\n
The service is designed for searches and uses such as:<\/p>\n
MCP verificar email\nMCP validar email\nMCP validar n\u00fameros de tel\u00e9fono\nMCP validar datos\nMCP validar ficheros\nMCP VerificarEmails\nVerificarEmails ChatGPT\nVerificarEmails Claude\n<\/code><\/pre>\nWhat data can be validated<\/h2>\n
MCP VerifyEmails allows you to work with different types of data.<\/p>\n
You can verify an individual email using the tool validate_email<\/code>.<\/p>\nYou can validate a phone number using HLR using validate_phone<\/code>.<\/p>\nYou can check only the syntax of a phone using validate_phone_syntactic<\/code>.<\/p>\nYou can check the portability or operator of a number using validate_phone_mnp<\/code>.<\/p>\nYou can also validate names with validate_name<\/code>, addresses with validate_address<\/code>, search for similar names with fuzzy_search_name<\/code> , and autocomplete partial names with name_complete<\/code>.<\/p>\nIn addition, the service allows you to validate entire files using validate_file<\/code>, check the status of that validation with get_file_validation_status<\/code> , and download the result with download_file_validation_result<\/code>.<\/p>\nConfiguring the MCP Service<\/h2>\n
The service published in:<\/p>\n
https:\/\/mcp.apinombres.workers.dev\/\n<\/code><\/pre>\nReturns a description with the main configuration data.<\/p>\n
The most important points are:<\/p>\n
Servicio: verificaremails-mcp\nEstado: online\nVersi\u00f3n: 1.8.1\nEndpoint MCP: https:\/\/mcp.apinombres.workers.dev\/mcp\nTransporte: http-json-rpc\n<\/code><\/pre>\nIt also indicates that it supports several versions of the MCP protocol:<\/p>\n
2025-06-18\n2025-03-26\n2024-11-05\n<\/code><\/pre>\nThe normal user does not need to know all these details. The important thing to know is that the endpoint that must be configured in ChatGPT, Claude or the MCP client is: <\/p>\n
https:\/\/mcp.apinombres.workers.dev\/mcp\n<\/code><\/pre>\nSettings in ChatGPT<\/h2>\n
To configure MCP VerifyEmails in ChatGPT, a new MCP<\/a> application or connector is created.<\/p>\nOn the configuration screen, you must indicate the name of the connector, for example:<\/p>\n
Verificar Emails MCP\n<\/code><\/pre>\nIn the MCP server URL field, you enter:<\/p>\n
https:\/\/mcp.apinombres.workers.dev\/\n<\/code><\/pre>\nor, if the client directly requests the MCP endpoint:<\/p>\n
https:\/\/mcp.apinombres.workers.dev\/mcp\n<\/code><\/pre>\nThe authentication must be:<\/p>\n
OAuth\n<\/code><\/pre>\nIn advanced OAuth settings, the most important point is the registration method.<\/p>\n
The following must be selected:<\/p>\n
Registro din\u00e1mico de clientes (DCR)\n<\/code><\/pre>\nThis point is important because it allows ChatGPT to automatically register the OAuth client against the MCP server.<\/p>\n
In the settings displayed by ChatGPT, available scopes or tools are usually automatically detected, such as:<\/p>\n
validate_email\nvalidate_phone\nvalidate_phone_syntactic\nvalidate_phone_mnp\nvalidate_name\nvalidate_address\nfuzzy_search_name\nname_complete\nget_credits\nget_service_credits\nget_all_credits\nvalidate_file\nget_file_validation_status\ndownload_file_validation_result\n<\/code><\/pre>\nIn most cases, these values do not have to be changed. ChatGPT detects them from the MCP server and shows them selected by default. <\/p>\n
You may also see a notice that CIMD is unavailable because the server did not announce support for CIMD<\/strong>. This notice does not prevent you from using the service if you are using dynamic client registration using DCR. <\/p>\nThe key point of the setup is:<\/p>\n
Autenticaci\u00f3n: OAuth\nM\u00e9todo de registro: Registro din\u00e1mico de clientes (DCR)\nURL del servidor MCP: https:\/\/mcp.apinombres.workers.dev\/\n\n![\"Configuraci\u00f3n](\"https:\/\/www.verificaremails.com\/wp-content\/uploads\/2026\/05\/Captura-de-pantalla-2026-05-12-193529.png\")
\n<\/code><\/pre>\nWhat happens when you connect the MCP<\/h2>\n
When the connector is created and ChatGPT initiates the connection, a VerifyEmails authorization screen appears.<\/p>\n
On that screen, the Verify Emails API token is requested.<\/p>\n
The text that the user sees is similar to:<\/p>\n
Conectar verificaremails.com\n\nIntroduce tu token API de verificaremails.com. El servidor MCP no almacena tokens de usuario. El token se entregar\u00e1 al cliente como access_token OAuth para que pueda llamar al MCP con Authorization: Bearer.\n\nToken API de verificaremails.com\n\nAutorizar MCP\n\n![\"Token](\"https:\/\/www.verificaremails.com\/wp-content\/uploads\/2026\/05\/Captura-de-pantalla-2026-05-12-131917.png\")
\n<\/code><\/pre>\nThis means that each user must enter their own Verify Emails token.<\/p>\n
The Worker does not save the user’s token. The token is used so that ChatGPT can make calls to the MCP using Bearer authorization. <\/p>\n
The idea is that each user will use their own Verify Emails credits and that the MCP service will act as a bridge between the AI assistant and Verify Emails.<\/p>\n
Configuration in Claude<\/h2>\n
In Claude or other clients that support Remote MCP, the idea is similar.<\/p>\n
The URL of the MCP server is indicated:<\/p>\n
https:\/\/mcp.apinombres.workers.dev\/mcp\n<\/code><\/pre>\nThe recommended authentication is:<\/p>\n
OAuth\n<\/code><\/pre>\nIf the client allows you to choose dynamic logging, you should use:<\/p>\n
Dynamic Client Registration\n<\/code><\/pre>\nor:<\/p>\n
DCR\n<\/code><\/pre>\nIf the client automatically detects the OAuth configuration from the MCP server, you typically don’t need to manually enter all endpoints.<\/p>\n
Available OAuth endpoints<\/h2>\n
The MCP service publishes multiple OAuth endpoints so that clients can connect successfully.<\/p>\n
The most important are:<\/p>\n
Authorization endpoint:\nhttps:\/\/mcp.apinombres.workers.dev\/authorize\n\nToken endpoint:\nhttps:\/\/mcp.apinombres.workers.dev\/token\n\nRegistration endpoint:\nhttps:\/\/mcp.apinombres.workers.dev\/register\n\nOAuth metadata:\nhttps:\/\/mcp.apinombres.workers.dev\/.well-known\/oauth-authorization-server\n\nProtected resource metadata:\nhttps:\/\/mcp.apinombres.workers.dev\/.well-known\/oauth-protected-resource\n<\/code><\/pre>\nIn a normal setup with ChatGPT or Claude, the user usually does not have to enter all these fields. The client detects them from the MCP server. <\/p>\n
Still, it’s helpful to know them if you’re setting up an advanced client or your own integration.<\/p>\n
Use from technical clients<\/h2>\n
In addition to ChatGPT or Claude, the service can also be used from technical clients, scripts or own tools.<\/p>\n
In that case you can send the token directly as a Bearer:<\/p>\n
Authorization: Bearer <TOKEN_DE_VERIFICAREMAILS>\n<\/code><\/pre>\nFor example, a technical customer can call the MCP endpoint with:<\/p>\n
https:\/\/mcp.apinombres.workers.dev\/mcp\n<\/code><\/pre>\nand add the authorization header.<\/p>\n
This mode is useful for developers, local testing, or custom integrations.<\/p>\n
Verify an individual email from chat<\/h2>\n
One of the main functions of the service is to verify emails<\/a> from the chat.<\/p>\nA real example of use was:<\/p>\n
Utiliza VerificarEmails MCP 1.7 para validar el mail antxon.pous@gmail.com\n<\/code><\/pre>\nThe assistant replied:<\/p>\n
Voy a buscar la herramienta disponible de VerificarEmails y usarla para validar esa direcci\u00f3n.\n<\/code><\/pre>\nThe wizard then called the corresponding MCP tool.<\/p>\n
In the conversation appeared:<\/p>\n
Herramienta llamada\n<\/code><\/pre>\nAnd then the result was shown:<\/p>\n
Validaci\u00f3n realizada.\n\nNo es concluyente; el dominio acepta correos de forma amplia o no permite confirmar el buz\u00f3n concreto con certeza.\n<\/code><\/pre>\nThis example shows the basic flow of MCP verify email<\/strong>.<\/p>\nThe user writes the email, the wizard calls Verify Emails using MCP, and returns the result in an understandable sentence.<\/p>\n
The specific answer always depends on what Verify Emails returns for that email. In this example, the result was “inconclusive.” <\/p>\n
Why ChatGPT can ask for authorization before verifying<\/h2>\n
When an email, phone number or any other piece of information is validated, the assistant will call an external tool.<\/p>\n
That is why ChatGPT can ask for authorization before executing the action.<\/p>\n
This is normal. It is used for the user to confirm that they want to share that data with the MCP service of VerifyEmails. <\/p>\n
The service declares its individual validation tools as read-only tools. In other words, they are designed to consult information, not to modify user data. <\/p>\n
Even so, each platform decides when to ask for confirmation.<\/p>\n
Validate a phone number from chat<\/h2>\n
The same flow can be used to validate phone numbers<\/a>.<\/p>\nFor example, the user can type:<\/p>\n
Utiliza VerificarEmails MCP para validar el n\u00famero 34677934019\n<\/code><\/pre>\nThe wizard can use the tool:<\/p>\n
validate_phone\n<\/code><\/pre>\nThis tool verifies a phone using HLR query.<\/p>\n
There are also two other phone-related options:<\/p>\n
validate_phone_syntactic\n<\/code><\/pre>\nto check if the number has a correct syntax, and:<\/p>\n
validate_phone_mnp\n<\/code><\/pre>\nto consult portability or operator.<\/p>\n
This use is intended for searches such as:<\/p>\n
MCP validar n\u00fameros de tel\u00e9fono\nMCP validar tel\u00e9fono\nvalidar tel\u00e9fono desde ChatGPT\nvalidar tel\u00e9fono con Claude\n<\/code><\/pre>\nCheck available credits<\/h2>\n
MCP VerifyEmails also allows you to check the available credits.<\/p>\n
The tools are:<\/p>\n
get_credits\nget_all_credits\nget_service_credits\n<\/code><\/pre>\nget_credits<\/code> is an alias for get_all_credits<\/code>.<\/p>\nIf you want to check all the credits, you can order:<\/p>\n
Consulta los cr\u00e9ditos que me quedan\n<\/code><\/pre>\nIf you want to check the credits for a specific service, you can request:<\/p>\n
Consulta los cr\u00e9ditos que me quedan para email\n<\/code><\/pre>\nThe services supported for credits are:<\/p>\n
name\nphone\nemail\naddress\nphonemnp\nfuzzysearch\nnamecomplete\nphonesyntactic\n<\/code><\/pre>\nValidate files with emails, telephone numbers or other data<\/h2>\n
One of the most useful features of MCP VerifyEmails is file validation.<\/p>\n
The user can upload a file to the chat and indicate where the data is.<\/p>\n
For example:<\/p>\n
Ahora quiero verificar los emails del fichero. Los mails est\u00e1n en la primera columna.\n<\/code><\/pre>\nThe wizard uses the tool:<\/p>\n
validate_file\n<\/code><\/pre>\nThe process is asynchronous. This means that the file is sent to VerifyEmails, the system returns a request identifier and the status can be checked later. <\/p>\n
That identifier is called:<\/p>\n
request_id\n<\/code><\/pre>\nReal example of file validation<\/h2>\n
In a real conversation, the user uploaded a file called:<\/p>\n
Email.txt\n<\/code><\/pre>\nand asked:<\/p>\n
Ahora quiero verificar los emails del fichero. Los mails est\u00e1n en la primera columna.\n<\/code><\/pre>\nThe wizard initiated bulk email validation using the first column.<\/p>\n
The CCM’s actual response was:<\/p>\n
{\n \"request_id\": \"6918337\",\n \"service\": \"validate_email\",\n \"api_service\": \"email\",\n \"filename\": \"Email.txt\",\n \"column\": 1,\n \"send_email\": 0,\n \"async\": true,\n \"status_tool\": \"get_file_validation_status\",\n \"download_tool\": \"download_file_validation_result\"\n}\n<\/code><\/pre>\nThe most important thing about this answer is:<\/p>\n
request_id: 6918337\n<\/code><\/pre>\nThis number allows you to check the status of the process later.<\/p>\n
Check the status of file validation<\/h2>\n
The user then asked:<\/p>\n
Comprueba el estado de la verificaci\u00f3n\n<\/code><\/pre>\nThe assistant used:<\/p>\n
get_file_validation_status\n<\/code><\/pre>\nThe CCM’s actual response was:<\/p>\n
{\n \"request_id\": \"6918337\",\n \"service\": \"validate_email\",\n \"api_service\": \"email\",\n \"status\": \"Completado\",\n \"items\": {\n \"total\": \"2\",\n \"processed\": \"2\",\n \"pending\": \"0\"\n },\n \"credits\": {\n \"billed\": \"2.00\",\n \"not_billed\": \"0.00\"\n },\n \"name\": \"Email.txt\",\n \"date_created\": \"2026-05-12 14:21:04\",\n \"date_updated\": \"2026-05-12 14:21:20\",\n \"download_available\": true,\n \"completed\": true\n}\n<\/code><\/pre>\nWith this answer you can see that:<\/p>\n
El estado es Completado.\nEl fichero ten\u00eda 2 registros.\nSe procesaron 2 registros.\nNo qued\u00f3 ning\u00fan registro pendiente.\nSe facturaron 2.00 cr\u00e9ditos.\nEl resultado est\u00e1 disponible para descarga.\n<\/code><\/pre>\nDownload and display the results of the file<\/h2>\n
When validation is complete, the user can request:<\/p>\n
P\u00edntame una tabla con los resultados de la verificaci\u00f3n\n<\/code><\/pre>\nThe wizard uses:<\/p>\n
download_file_validation_result\n<\/code><\/pre>\nThis tool downloads the result without displaying the internal download URL, because that URL contains the user’s token.<\/p>\n
In a real test, the downloaded content was a CSV like this:<\/p>\n
status,email,result,Email\nNo concluyente,apousb@yahoo.es,\"{\"\"status\"\":\"\"ok_for_all\"\"}\",apousb@yahoo.es\nNo concluyente,isa@yahoo.es,\"{\"\"status\"\":\"\"ok_for_all\"\"}\",isa@yahoo.es\n<\/code><\/pre>\nPresented as a table:<\/p>\n