@engagelabemail/cli

EngageLab Email CLI

EngageLab Email CLI helps agents and developers work with inbound and outbound email from the command line.

Use it to:

• List available mailboxes
• List and inspect email threads
• Read inbound messages
• Poll for new inbound messages
• Reply to inbound messages
• Send new emails

Install

npm install -g @engagelabemail/cli

Check the installed version:

engagelab-email-cli -V

When you run a command that connects to EngageLab Email, the CLI checks whether a newer CLI version is available. If an update is required, it stops and shows the update command:

npm install -g @engagelabemail/cli@latest

Configuration

Manage Saved Configuration

Use the config command group to save, inspect, or clear local credentials.

Save your service address and Secret Key locally:

engagelab-email-cli config set --base-url http://localhost:8087 --secret-key sk_xxx

View the saved configuration:

engagelab-email-cli config list

Clear the saved configuration:

engagelab-email-cli config clear

config list masks the Secret Key.

Use Global Credentials With Any Business Command

You do not have to save credentials first. You can pass --base-url and --secret-key directly before any business command such as threads ... or emails .... These command-line credentials apply only to the current command and do not overwrite saved config.

Example:

engagelab-email-cli --base-url http://localhost:8087 --secret-key sk_xxx threads get thread-1

Quick Start

List recent inbound messages:

engagelab-email-cli emails receiving list --mailbox-id 12 --page-size 20

Read one inbound message:

engagelab-email-cli emails receiving get <message-uid>

View the full thread around a message:

engagelab-email-cli threads messages <thread-id> --include-content --limit 10

Reply to an inbound message:

engagelab-email-cli emails receiving reply <message-uid> --subject "Re: Hello" --text "Thanks, we received your message."

Send a new email:

engagelab-email-cli emails send \
  --mailbox-id 1001 \
  --to [e-mail] \
  --subject "Hello" \
  --text "Hello from EngageLab Email CLI."

For scripts or agents, add --json to get machine-readable output:

engagelab-email-cli emails receiving list --mailbox-id 12 --page-size 20 --json

Commands

config set

Save local configuration.

Option	Description
--base-url <url>	Service address. Defaults to ENGAGELAB_EMAIL_BASE_URL when set.
--secret-key <key>	Secret Key. Defaults to ENGAGELAB_EMAIL_SECRET_KEY when set.

Example:

engagelab-email-cli config set --base-url http://localhost:8087 --secret-key sk_xxx

config list

Show saved configuration.

Example:

engagelab-email-cli config list

config clear

Clear saved local configuration, including baseUrl and secretKey.

Example:

engagelab-email-cli config clear

mailbox list

List available mailboxes.

Option	Description
--mailbox <address>	Filter by mailbox address.
--page-no <number>	Page number.
--page-size <number>	Page size.
--json	Output raw JSON.

Example:

engagelab-email-cli mailbox list --page-size 20

threads list

List email threads.

Option	Description
--mailbox-id <id>	Filter by mailbox ID.
--subject <text>	Search by normalized subject.
--participant <email>	Search by participant.
--start-time <timestamp>	Latest message start timestamp in milliseconds.
--end-time <timestamp>	Latest message end timestamp in milliseconds.
--page-no <number>	Page number.
--page-size <number>	Page size.
--json	Output raw JSON.

Example:

engagelab-email-cli threads list --subject refund --page-no 1 --page-size 20

threads get <thread-id>

Show one thread.

Argument/Option	Description
<thread-id>	Thread ID.
--json	Output raw JSON.

Example:

engagelab-email-cli threads get b0d9d6a1-1d17-4df8-8245-c807d7e8cb50

threads messages <thread-id>

List messages in a thread.

Argument/Option	Description
<thread-id>	Thread ID.
--limit <number>	Message limit.
--include-content	Include text/html/headers/attachments.
--json	Output raw JSON.

Example:

engagelab-email-cli threads messages b0d9d6a1-1d17-4df8-8245-c807d7e8cb50 --include-content --json

emails receiving list

List inbound messages.

Option	Description
--mailbox-id <id>	Filter by mailbox ID.
--keyword <text>	Search keyword.
--page-no <number>	Page number.
--page-size <number>	Page size.
--json	Output raw JSON.

Example:

engagelab-email-cli emails receiving list --keyword refund --page-size 20

emails receiving get <message-uid>

Show one inbound message.

Argument/Option	Description
<message-uid>	Message UID.
--json	Output raw JSON.

Example:

engagelab-email-cli emails receiving get 7e2b2de6-14c5-4ef1-a1e2-f4337e4606e2 --json

emails receiving listen

Poll for new inbound messages. This command keeps running until you stop it with Ctrl+C.

Option	Description
--after <id>	Cursor ID from the previous result.
--limit <number>	Message limit.
--interval <seconds>	Polling interval in seconds (minimum 2).
--json	Output one JSON message per line.

Example:

engagelab-email-cli emails receiving listen --limit 10 --interval 5 --json

Continue from a known cursor:

engagelab-email-cli emails receiving listen --after 1500 --limit 10 --interval 5 --json

emails receiving reply <message-uid>

Reply to an inbound message.

Argument/Option	Description
<message-uid>	Message UID to reply to.
--subject <text>	Reply subject.
--text <text>	Plain text body.
--html <html>	HTML body.
--text-file <path>	Read plain text body from file.
--html-file <path>	Read HTML body from file.
--cc <email>	CC address. Can be repeated.
--bcc <email>	BCC address. Can be repeated.
--reply-to <email>	Reply-To address. Can be repeated.
--preview-text <text>	Email preview text.
--attachment <path>	Attach local file. Can be repeated. Requires --disposition. Up to 10 files, 10MB total after base64 encoding (about 7.5MB raw files).
--disposition <value>	Attachment disposition: attachment or inline. Required when using --attachment. Can be repeated or provided once for all attachments.
--content-id <id>	Content-ID for inline image attachments. Required when --disposition inline is used with an image attachment.
--sandbox	Send in sandbox mode.
--json	Output raw JSON.

Example:

engagelab-email-cli emails receiving reply 7e2b2de6-14c5-4ef1-a1e2-f4337e4606e2 \
  --subject "Re: Refund update" \
  --text "Thanks, we received your message." \
  --attachment ./receipt.pdf \
  --disposition attachment

emails send

Send a new email.

Option	Description
--mailbox-id <id>	Mailbox ID.
--from <email>	Sender email address.
--to <email>	Recipient email address. Can be repeated.
--subject <text>	Email subject.
--text <text>	Plain text body.
--html <html>	HTML body.
--text-file <path>	Read plain text body from file.
--html-file <path>	Read HTML body from file.
--cc <email>	CC address. Can be repeated.
--bcc <email>	BCC address. Can be repeated.
--reply-to <email>	Reply-To address. Can be repeated.
--preview-text <text>	Email preview text.
--attachment <path>	Attach local file. Can be repeated. Requires --disposition. Up to 10 files, 10MB total after base64 encoding (about 7.5MB raw files).
--disposition <value>	Attachment disposition: attachment or inline. Required when using --attachment. Can be repeated or provided once for all attachments.
--content-id <id>	Content-ID for inline image attachments. Required when --disposition inline is used with an image attachment.
--sandbox	Send in sandbox mode.
--json	Output raw JSON.

Example:

engagelab-email-cli emails send \
  --mailbox-id 1001 \
  --to [e-mail] \
  --to [e-mail] \
  --subject "Refund update" \
  --text "Your refund has been processed." \
  --attachment ./receipt.pdf \
  --disposition attachment

Send HTML with an inline image attachment:

engagelab-email-cli emails send --mailbox-id 1001 --to [e-mail] --subject "Inline image" --html "<p>Logo <img src=cid:image_1000></p>" --attachment ./logo.png --disposition inline --content-id image_1000

Attachment metadata can be passed in two compatible ways. The recommended form binds metadata to each file path, which avoids ambiguity with multiple attachments:

engagelab-email-cli emails send --mailbox-id 1001 --to [e-mail] --subject "Mixed attachments" --html "<p>Logo <img src=cid:image_1000></p>" --attachment "./receipt.pdf;disposition=attachment" --attachment "./logo.png;disposition=inline;content_id=image_1000"

The legacy split-option form is also supported for compatibility:

engagelab-email-cli emails send --mailbox-id 1001 --to [e-mail] --subject "Inline image" --html "<p>Logo <img src=cid:image_1000></p>" --attachment ./logo.png --disposition inline --content-id image_1000

Do not mix inline attachment metadata (path;disposition=...) with --disposition or --content-id in the same command. Send HTML content from a file:

engagelab-email-cli emails send \
  --mailbox-id 1001 \
  --to [e-mail] \
  --subject "Monthly report" \
  --html-file ./report.html

Output

By default, the CLI prints readable tables or summaries and shows a short loading message while requests are running.

Use --json when another tool or script needs to parse the result.

engagelab-email-cli emails receiving get <message-uid> --json

emails receiving listen --json prints one message JSON object per line.

Errors

Human-readable errors include the business error code when the API returns one, for example [100101] unauthorized.

--json errors use this shape:

{
  "error": {
    "code": "auth_error",
    "errorCode": 100101,
    "message": "unauthorized"
  }
}

Exit codes:

Exit Code	Meaning
1	Parameter error or missing config
2	Authentication failure
3	Resource not found
4	Conflict or in-progress state
5	Server error or network error