Api Endpoint

BlockRun.AI

Outbound AI conversation call (Bland.ai). Defaults to 5 min, max 30 min.

Open interactive test console

Offering

Provider: BlockRun.AI
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Infrastructure
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://nano.blockrun.ai/api/v1/voice/call
MIME type: application/json
First seen: 2026-10-16T01:50:03.832Z
Last seen: 2026-11-04T17:19:50.301Z
Tags: X402, AI, blockchain, communications, voice, calls, bland

Website Documentation OpenAPI

Payment pricing

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

Payment option 1: 0.54 USDC
Atomic price: 540000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 2: 0.54 USDC
Atomic price: 540000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Payment option 3: 0.54 USDC
Atomic price: 540000 · Network: eip155:10 · Asset: USDC · Scheme: exact
Payment option 4: 540000 atomic units
Atomic price: 540000 · Network: eip155:130 · Asset: 0x078D782b760474a361dDA0AF3839290b0EF57AD6 · Scheme: exact
Payment option 5: 0.54 USDC
Atomic price: 540000 · Network: eip155:43114 · Asset: USDC · Scheme: exact
Payment option 6: 540000 atomic units
Atomic price: 540000 · Network: eip155:1 · Asset: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 · Scheme: exact
Payment option 7: 540000 atomic units
Atomic price: 540000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "540000",
    "payTo": "0xe9030014F5DAe217d0A152f02A043567b16c1aBf"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "540000",
    "payTo": "0xe9030014F5DAe217d0A152f02A043567b16c1aBf"
  },
  {
    "scheme": "exact",
    "network": "eip155:10",
    "asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
    "amount": "540000",
    "payTo": "0xe9030014F5DAe217d0A152f02A043567b16c1aBf"
  },
  {
    "scheme": "exact",
    "network": "eip155:130",
    "asset": "0x078D782b760474a361dDA0AF3839290b0EF57AD6",
    "amount": "540000",
    "payTo": "0xe9030014F5DAe217d0A152f02A043567b16c1aBf"
  },
  {
    "scheme": "exact",
    "network": "eip155:43114",
    "asset": "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
    "amount": "540000",
    "payTo": "0xe9030014F5DAe217d0A152f02A043567b16c1aBf"
  },
  {
    "scheme": "exact",
    "network": "eip155:1",
    "asset": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    "amount": "540000",
    "payTo": "0xe9030014F5DAe217d0A152f02A043567b16c1aBf"
  },
  {
    "scheme": "exact",
    "network": "eip155:5042",
    "asset": "0x3600000000000000000000000000000000000000",
    "amount": "540000",
    "payTo": "0xe9030014F5DAe217d0A152f02A043567b16c1aBf"
  }
]

Observed health

Status: Healthy
Latest latency: 76 ms
Average latency: 410 ms
HTTP status: 204
Last checked: 2026-11-01T20:59:50.511Z
Reachability: 100% over 11 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": [
      "to",
      "task",
      "from"
    ],
    "properties": {
      "to": {
        "type": "string",
        "description": "Destination phone number in E.164 format, e.g. +14155552671."
      },
      "from": {
        "type": "string",
        "description": "Wallet-owned phone number used as caller ID (E.164). Required — purchase one via /api/v1/phone/numbers/buy first."
      },
      "task": {
        "type": "string",
        "maxLength": 4000,
        "minLength": 10,
        "description": "Natural-language description of what the AI agent should do on the call."
      },
      "model": {
        "enum": [
          "base",
          "enhanced",
          "turbo"
        ],
        "type": "string",
        "description": "Bland conversation model tier."
      },
      "voice": {
        "type": "string",
        "description": "Voice preset: nat, josh, maya, june, paige, derek, florian — or a Bland.ai voice ID."
      },
      "language": {
        "type": "string",
        "default": "en-US",
        "description": "Language code for STT/TTS."
      },
      "max_duration": {
        "type": "integer",
        "default": 5,
        "maximum": 30,
        "minimum": 1,
        "description": "Maximum call length in minutes."
      },
      "first_sentence": {
        "type": "string",
        "maxLength": 500,
        "description": "Optional fixed opening line spoken before the AI takes over."
      },
      "wait_for_greeting": {
        "type": "boolean",
        "description": "If true, AI waits for the recipient to speak first."
      },
      "interruption_threshold": {
        "type": "integer",
        "maximum": 500,
        "minimum": 50,
        "description": "How aggressive the AI is about interrupting (ms)."
      }
    },
    "additionalProperties": false
  },
  "type": "http",
  "method": "POST",
  "bodyType": "json"
}

Output schema

{
  "type": "object",
  "properties": {
    "example": {
      "type": "object",
      "properties": {
        "status": {
          "type": "string"
        },
        "call_id": {
          "type": "string"
        },
        "poll_url": {
          "type": "string"
        }
      }
    }
  }
}