Checks email addresses in real time without sending mail, returning a valid, risky, invalid or unknown status with a score and disposable or catch-all flags.
Setup
Choose your client, copy the config, then fill in any required environment variables.
Local
claude mcp add mailprobe --env MAILPROBE_API_KEY='<MAILPROBE_API_KEY>' -- npx -y mailprobe-mcp~/.codex/config.toml
[mcp_servers.mailprobe]
command = "npx"
args = ["-y", "mailprobe-mcp"]
env = { MAILPROBE_API_KEY = "<MAILPROBE_API_KEY>" }
# codex mcp add mailprobe --env MAILPROBE_API_KEY='<MAILPROBE_API_KEY>' -- npx -y mailprobe-mcp~/.cursor/mcp.json
{
"mcpServers": {
"mailprobe": {
"command": "npx",
"args": [
"-y",
"mailprobe-mcp"
],
"env": {
"MAILPROBE_API_KEY": "<MAILPROBE_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"mailprobe": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"mailprobe-mcp"
],
"env": {
"MAILPROBE_API_KEY": "<MAILPROBE_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"mailprobe": {
"command": "npx",
"args": [
"-y",
"mailprobe-mcp"
],
"env": {
"MAILPROBE_API_KEY": "<MAILPROBE_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"mailprobe": {
"command": "npx",
"args": [
"-y",
"mailprobe-mcp"
],
"env": {
"MAILPROBE_API_KEY": "<MAILPROBE_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"mailprobe": {
"command": "npx",
"args": [
"-y",
"mailprobe-mcp"
],
"env": {
"MAILPROBE_API_KEY": "<MAILPROBE_API_KEY>"
}
}
}
}Remote
claude mcp add --transport http mailprobe https://mailprobe.dev/mcp --header 'Authorization: Bearer <API_KEY>'~/.codex/config.toml
[mcp_servers.mailprobe]
url = "https://mailprobe.dev/mcp"
bearer_token_env_var = "MAILPROBE_API_KEY"
# codex mcp add mailprobe --url https://mailprobe.dev/mcp --bearer-token-env-var MAILPROBE_API_KEY
# export MAILPROBE_API_KEY=<API_KEY>~/.cursor/mcp.json
{
"mcpServers": {
"mailprobe": {
"url": "https://mailprobe.dev/mcp",
"headers": {
"Authorization": "Bearer <API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"mailprobe": {
"type": "http",
"url": "https://mailprobe.dev/mcp",
"headers": {
"Authorization": "Bearer <API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"mailprobe": {
"httpUrl": "https://mailprobe.dev/mcp",
"headers": {
"Authorization": "Bearer <API_KEY>"
}
}
}
}claude_desktop_config.json · Customize › Connectors › Add custom connector
{
"mcpServers": {
"mailprobe": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://mailprobe.dev/mcp",
"--header",
"Authorization:${AUTH_HEADER}"
],
"env": {
"AUTH_HEADER": "Bearer <API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"mailprobe": {
"url": "https://mailprobe.dev/mcp",
"headers": {
"Authorization": "Bearer <API_KEY>"
}
}
}
}Environment variables
MAILPROBE_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.