StablePhone

AI phone calls and phone numbers. No API keys. No accounts. Pay per request.

Powered by micropayments and Bland.ai

AgentCash

Install StablePhone into AgentCash, make a first live call, and keep phone calls and number management ready for reuse.

Run in your terminal

Onboard into AgentCash, make one live call against this API, then save it into your agent's persistent context.

Step 1

Onboard AgentCash

Sets up AgentCash and routes you through credits if needed.

$npx agentcash onboard
Step 2

Try the API

Discovers the origin and walks the first live call path.

$npx agentcash try https://stablephone.dev
Step 3

Add for reuse

Keeps StablePhone available in your agent's persistent context.

$npx agentcash add https://stablephone.dev
StablePhonestablephone.dev
AgentCash Docs

How it works

  1. 1POST a phone number and task to /api/call
  2. 2Get back a 402 with payment requirements (USDC on Base, Solana, or Tempo)
  3. 3Pay and resend — AI calls the number with your instructions
  4. 4Poll the status endpoint for transcript and summary

Example

POST /api/call
{
  "phone_number": "+14155551234",
  "task": "Call and ask if they can meet tomorrow at 2pm. Be friendly and professional."
}
First response (pay this)
HTTP/1.1 402 Payment Required
X-PAYMENT: { "scheme": "exact", "network": "eip155:8453", ... }
After payment
{
  "success": true,
  "call_id": "abc-123-def",
  "message": "Call initiated successfully"
}

Endpoints

EndpointPrice
POST /api/call

Make an AI phone call

$0.54
GET /api/call/:id

Get call status and transcript

Free
POST /api/number

Buy a phone number (30 days)

$20.00
POST /api/number/topup

Extend a number 30 days

$15.00
GET /api/numbers

List your phone numbers

Free
POST /api/lookup

Check iMessage/FaceTime status

$0.05
GET /api/lookup/status

Poll lookup results

Free

Voices

VoiceDescription
natdefaultAmerican female
joshArticulate American male
mayaYoung American female, soft
juneAmerican female
paigeCalm, soft-tone female
derekSoft and engaging male
florianGerman male

Pass any Bland.ai voice ID for custom voices.

Discovery

x402 resource discovery at /.well-known/x402

Agent instructions at /llms.txt