US mobile numbers on a national carrier, not VoIP. Your agent receives texts and verification codes over an API or a webhook, sends texts, and makes and takes calls over SIP with its own caller ID. Order by API; numbers from stock go live in seconds.
Apps, banks and carriers look up what kind of number is calling or signing up. A VoIP number fails that lookup before your agent has said a word.
Everything a phone can do, over HTTP and SIP, with nothing to install.
Each number is a live mobile line on a national US network, on our own carrier account.
Read every text with one GET, or have each one POSTed to your URL as it arrives.
One SIP login for all your numbers. Make and take calls; the caller ID is the number itself.
Order by API with a count and an area code or ZIP. Numbers in stock are yours at once; new ones follow in minutes.
Every number, message and charge in one place. Prepaid wallet by card, crypto, wire or Zelle.
Any HTTP client, any SIP-capable voice agent platform, and our MCP server for agent frameworks.
# 1. Order one number, two months up front curl -X POST https://api.meisimusa.com/api/v1/sms/order \ -H "x-dealer-key: $KEY" -H "Content-Type: application/json" \ -d '{"count":1,"area_code":"929","billing":"monthly","months":2,"line_history":"any"}' # 2. Read what it received curl "https://api.meisimusa.com/api/v1/sms/messages?number=9295550142" \ -H "x-dealer-key: $KEY" { "from": "+1833…", "text": "Your code is 482913", "received_at": "…" } # 3. Call from it over SIP, from any SIP client or voice platform INVITE sip:+13105550199@<your SIP host> X-CALL-FROM: 9295550142
Company or project, what you are building, how many numbers. A person reads it and approves it, usually the same day.
Prepaid by card, crypto, wire or Zelle. The API key arrives with the approval; the dashboard shows the same numbers.
A count, an area code or ZIP, by the month. Numbers from stock go live in seconds.
Texts over the API or a webhook, calls over SIP, everything logged on the dashboard.
Public list prices. Volume pricing is set on your account by a person before your first order.
Sending texts is switched on per account on request and capped per number: these lines are for conversations and codes, not bulk messaging. Prepaid, no returns: a number is yours from the moment it is delivered. Spam, robocalls or fraud close the account at once.
Two taps to exactly what you need.
Real US mobile numbers by API: one per agent, texts in and out, voice over SIP, bound to the people it serves. For AI agents, apps and support teams.
See agent numbers →A real US carrier line that passes Cash App, Venmo, Coinbase & PayPal verification — where Google Voice and TextNow get rejected.
🏷️ Code AT10 — 10% off US voice plans Get a US number →From an account to a working number. No store, no contract, no SIM card.
Lost a SIM. Bought an eSIM-only phone. Need to swap a physical SIM to digital. Building a router or tablet plan. Whatever the reason, you need a clean, fresh AT&T eSIM — and you need it right now.
We sell blank AT&T eSIMs — no plan attached, no minutes, no data — ready to activate on any AT&T account you already have. Call AT&T (611), give them the ICCID we emailed you, and you're done.
The same real lines serve an AI agent, a support desk, a dealer at a counter, and a student landing at JFK.