Index onlineMerchant portal
Api Endpoint

StablePhone

Make an AI phone call ($0.54). Send a phone number and task, get back a call_id to track status. Returns 403 if the number is on the Do-Not-Call (DNC) list — do not retry DNC numbers.

Open interactive test console

Offering

Provider
StablePhone
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Social Intelligence
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://stablephone.dev/api/call
MIME type
application/json
First seen
2026-10-16T01:50:04.338Z
Last seen
Tags
X402, phone, voice, AI, stablephone, Social, communication

WebsiteDocumentationOpenAPI

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.54 USDC
Atomic price: 540000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.54 USDC
Atomic price: 540000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "540000",
    "payTo": "0xD219dB8179Bb9C1899eF87f39eebA9D1070c6801"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "540000",
    "payTo": "CvJc3pWFbx84XHiy18uZUNW1y9zdGMy1muHozCYiBsxj"
  }
]

Observed health

Status
Healthy
Latest latency
90 ms
Average latency
359 ms
HTTP status
204
Last checked
Reachability
100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "body": {
    "type": "object",
    "required": [
      "phone_number",
      "task"
    ],
    "properties": {
      "from": {
        "type": "string",
        "pattern": "^\\+1\\d{10}$"
      },
      "task": {
        "type": "string",
        "maxLength": 4000,
        "minLength": 1
      },
      "model": {
        "enum": [
          "base",
          "turbo"
        ],
        "type": "string"
      },
      "voice": {
        "type": "string"
      },
      "record": {
        "type": "boolean"
      },
      "metadata": {
        "type": "object",
        "propertyNames": {
          "type": "string"
        },
        "additionalProperties": {}
      },
      "max_duration": {
        "type": "integer",
        "maximum": 30,
        "minimum": 1
      },
      "phone_number": {
        "type": "string",
        "pattern": "^\\+1\\d{10}$"
      },
      "first_sentence": {
        "type": "string",
        "maxLength": 500
      },
      "voicemail_action": {
        "enum": [
          "hangup",
          "leave_message",
          "ignore"
        ],
        "type": "string"
      },
      "voicemail_message": {
        "type": "string",
        "maxLength": 500
      },
      "wait_for_greeting": {
        "type": "boolean"
      },
      "transfer_phone_number": {
        "type": "string"
      }
    },
    "additionalProperties": false
  },
  "type": "http",
  "method": "POST",
  "bodyType": "json"
}

Output schema

{
  "type": "object",
  "required": [
    "success",
    "call_id",
    "message"
  ],
  "properties": {
    "call_id": {
      "type": "string"
    },
    "message": {
      "type": "string"
    },
    "success": {
      "type": "boolean",
      "const": true
    }
  },
  "additionalProperties": false
}