MCP SERVERRent a dedicated real-SIM US number, wait for the SMS, and get the OTP parsed out of it.
LABSCO SUMMARY
The flow is the product: rent a number, tag it with the service it is for, wait until the SMS lands, take the code out of it. Because the lines are dedicated real SIMs rented monthly rather than pooled, the same number is still yours the next time that service texts you.
A phone-number service for agents. The numbers are dedicated real-SIM US lines rented monthly, and the tools are shaped around the verification flow: provision, wait, read the parsed code, clear the inbox.
A JoltSMS API key as JOLTSMS_API_KEY, generated in the dashboard, and npx to launch it. Provisioning a number requires a payment method on file and costs $50 per month.
One command plus a key — npx -y @joltsms/mcp-server, then supply credentials
USE CASES
Provision a number in the area code you need, wait for the SMS, and read the code out of it.
Label a number with the service it was used for and tag it, so a year of rentals stays legible.
Find the number you used for it, read the latest code, and clear the inbox behind you.
List the recent messages with senders and parsed codes, then mark them read in bulk.
Check the billing status of every subscription and release the numbers you no longer need.
Counted once with only startup setup. Other versions, modes or optional credentials may expose a different list.
joltsms_billing_statusCheck billing and subscription status for all your JoltSMS numbers.
Shows each subscription with billing health, price, renewal/cancellation dates, and auto-renew status. Cross-references with phone numbers for easy identification.
joltsms_get_latest_otpGet the most recent parsed OTP code from a phone number.
Convenience tool — checks recent messages (last 10 minutes by default) for a parsed verification code. If no parsed code is found, returns the most recent message body for manual extraction.
Use joltsms_wait_for_sms if you need to wait for an OTP that hasn't arrived yet.
joltsms_get_numberGet full details for a single phone number, including service label, tags, notes, message counts, billing dates, and subscription status.
Accepts a UUID or phone number (e.g. "+16505551234", "650-555-1234", "(650) 555-1234").
joltsms_list_messagesList recent SMS messages received on your JoltSMS numbers.
Returns sender, body, parsed OTP code (if detected), and timestamps. Use number_id to filter to a specific number, or omit for all numbers. Use from_filter for exact-match sender filtering.
joltsms_list_numbersList your active JoltSMS phone numbers. Returns phone number, status, service label, tags, message count, and subscription details.
Each number costs $50/month and receives unlimited inbound SMS with parsed OTP codes.
joltsms_mark_readMark messages as read. Provide exactly ONE of:
Use after extracting an OTP to keep the inbox clean.
joltsms_provision_numberRent a new dedicated real-SIM US phone number ($50/month).
IMPORTANT: The user must have a payment method set up in the JoltSMS dashboard first.
Provisioning is async — the number may take seconds to minutes to become ACTIVE. For specific area codes, provide the 3-digit code (e.g. "212" for New York).
If 3DS authentication is required, this tool returns a URL the user must visit to authorize payment.
joltsms_release_numberCancel/release a phone number. The number stays active until the end of the current billing period.
Requires the subscription ID (from joltsms_list_numbers output). This disables auto-renewal — the number will be released when the period ends.
joltsms_update_numberUpdate metadata on a phone number — set a service label, tags, or notes.
Only provided fields are updated. Omitted fields remain unchanged. Pass an empty array [] to clear tags, or an empty string "" to clear notes.
Examples: update_number("+16505551234", service_name="PayPal", tags=["production"]) update_number("+16505551234", notes="Linked to acme@company.com")
joltsms_wait_for_smsPoll for an incoming SMS message on a specific number. This is the KEY tool for OTP verification workflows.
Typical workflow:
Use from_filter to only match messages from a specific sender. Default timeout is 120 seconds with 5-second polling intervals.
BEFORE YOU INSTALL
10 tools when we connected.
All 3 documented clients run the server on your machine.
CONTEXT COST
Rated by the size of the 10 tool definitions that ride along on every turn, not by how many there are
INSTALLATION
npx -y @joltsms/mcp-server{
"mcpServers": {
"joltsms": {
"command": "npx",
"args": [
"-y",
"@joltsms/mcp-server"
],
"env": {
"JOLTSMS_API_KEY": "<YOUR_JOLTSMS_API_KEY>"
}
}
}
}MCP servers
agentsimdev
quackr-mcp
Wavix
1fancy