Developer pricing
Wholesale rates. One API.
SMS, voice, phone numbers and AI voice agents, priced from a live wholesale market: the rate carriers list, plus one fee capped at $0.001. Pay as you go from $5, with no contract, seats or monthly plan.
- Same routes, same wholesale rates
- No developer surcharge
- Move between the two anytime
Why developers build here
Pay what the carrier charges, not a retail markup.
A typical messaging platform buys wholesale and sells you retail. Here you buy on the wholesale market itself, through one API, at the rates carriers list.

The carrier’s price, plus at most $0.001
Every SMS and call bills at the rate the carrier listed, plus a 2% platform fee that never passes $0.001. There is no retail markup in between.
Every price public before you send
Routes and their rates are listed on the marketplace, open to anyone. You know what a destination costs before you write a line of code.
One key for everything
SMS, voice, phone verification by code or call-in, phone numbers and AI voice agents on one API key and one prepaid balance. No per-product contracts.
Built for AI agents
An MCP server gives agents tools to find routes, send and check the balance, and x402 lets an agent top up its own balance in USDC.
How you are billed
The route rate plus one capped fee.
- Platform fee
- 2% of the route rate via the API or Dialer, capped at $0.001 per call or SMS. Charged once per message, however many segments it takes.
- Prepaid
- Top up from $5 by card or crypto, or $100 by bank wire. No contract, no seats, no monthly plan, no invoice.
- SMS
- Billed per segment: 160 characters, or 70 with Unicode. A longer message is sent, and billed, as several.
- Voice
- Billed on each route's own increment, shown on the route: 60/60, 6/6 or 1/1 (first block, then each step, in seconds).
- SMS and voice OTP
- A code sent with the Verify API (
POST /verify/start, then/verify/check) bills as the SMS or call that carries it. A voice code is a short call on the route increment. No per-verification fee, no speech surcharge. - Call-in verification
- $0.01 per approved verification, from your balance, plus the monthly price of the phone number you use for it. Your user calls your own number, bought in the DID Store in their country, so there is no SMS, no message fee and no call cost, and the call is free for them. Expired verifications are free.
If the balance runs out, traffic pauses until you top up, so you can never owe us money.
$0.0122you pay per minute, for a $0.0120 carrier rate through the API
The carrier's rate, plus one small fee, capped.
An illustrative rate; every live rate is on the marketplace. The fee never passes $0.001 a call or message, whatever the rate.
- Carrier rate
- $0.0120
- Platform fee, 2%
- $0.00024
- You pay
- $0.0122
What you get with the API
The whole toolkit, included in the price.
- REST and signed webhooksJSON over HTTPS. Webhooks are signed with a timestamp, with a delivery log and resend.
- Test mode keysRun the real request through routing and pricing without delivering it or touching your live balance.
- TypeScript and Python SDKsTyped clients for the same endpoints, plus a webhook signature helper.
- OpenAPI referenceEvery endpoint, request and response, generated from the API itself.
- MCP serverConnect an AI agent and it can list routes, send SMS, place calls and read the balance.
- x402 top-upsAn agent funds its own balance with one signed USDC payment on Base.
- Smart routingPass cheapest, best_quality or balanced and the API picks the route per destination.
- Voice CLI TestingCheck that your caller ID arrives intact on a route before you send traffic.
- Phone numbersSearch and buy numbers by API. Inbound calls and SMS arrive as webhooks.
- AI voice agentsCreate an agent, test it in a simulated call, then attach it to a campaign.
- Usage per keyRequests, error rate and latency for each API key.
- ChangelogEvery change to the API, dated, with the endpoints it touches.
Other charges
Three optional products, priced on their own.
The platform fee is the whole fee on ordinary voice and SMS. These draw from the same prepaid balance.
AI voice agents
A flat rate per AI-connected minute, metered per second, on top of the underlying call. Charged only while an agent is on a live call.
About AI voicePhone numbers
A one-time setup fee plus a flat monthly price, by country and number type. Every number shows its exact price before you buy.
About numbersThe Switch
A separate monthly subscription with every module included and unlimited minutes switched, from $500 a month for 500 concurrent calls to $10,000 for 25,000. Call termination is billed separately. Beyond 25,000, talk to sales.
Switch plans
Questions
Before you build
Anything else is in the help centre, or ask the team directly.
Do developers pay more than carriers?
How do I migrate from another messaging API?
How do I pay?
Can I pick my own routes later?
What does the route data mean?
Is there a free tier?
Wholesale rates from your first message.
Free account, API key on signup, prepaid from $5. No contract and no sales call.
