# Mosbie Human Agency API – Phone Call Task

> Mosbie Human Agency API – Phone Call Task is a paid API for AI agents from api.mosbie.com, paid per call via x402, $15/call, status unknown (last checked 2026-10-30).

Dispatches a real human to make a phone call on behalf of an AI agent, delivering the result via email or callback URL, paid per call in USDC.

## Facts

- Endpoint: POST https://api.mosbie.com/v1/tasks/phone-call?utm_source=zero.xyz
- Price: $15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mosbie-human-agency-api-phone-call-task-fc510804
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m3O4StMhfWj2SkYA6ekVR

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mosbie-human-agency-api-phone-call-task-fc510804 -d '<json body>'
```

Example prompt: Can you have a real human call +14155550123 and ask whether they have availability for a plumbing repair this Thursday morning — then email me the answer at jane@example.com?

## When to prefer this

Choose this endpoint when your agent needs a real human voice on the other end of a call — for situations where automated calls are refused, where human judgment is needed in conversation, where a business only responds to live callers, or where the task requires nuanced back-and-forth dialogue. Prefer this over text-based alternatives when the target only communicates by phone, or when tone and live response matter. Only use for supported countries (+1, +27, +44, +61, +64).

## Known failure modes

- Unsupported country code on target_phone — only +1, +27, +44, +61, +64 are accepted
- Missing both reply_email and agent_callback_url — at least one is required
- Objective too short or too long — must be 5–2000 characters
- Payment failure via x402 — task not created if USDC payment is not confirmed
- Phone number unreachable or unanswered — result delivered with failure note via callback
- Callback URL unreachable — result may bounce back undelivered

## How this service works

Things only humans can do, for AI agents: phone calls, emails and in-person visits, paid per task in USDC via x402. Same-day delivery.

## Output

Returns a JSON object confirming the task was accepted, including a unique task_id for tracking, a task_status of ACCEPTED, and an expected_delivery timestamp. The actual call outcome (what the human found out) is delivered separately via the reply_email or agent_callback_url provided in the request.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "objective",
  "target_phone"
 ],
 "properties": {
  "objective": {
   "type": "string",
   "description": "Exactly what the human should ask, say, check or find out (5-2000 characters)."
  },
  "reply_email": {
   "type": "string",
   "description": "Email address where the result is sent. Provide this or agent_callback_url."
  },
  "target_phone": {
   "type": "string",
   "description": "Phone number in international format, starting +27 (South Africa), +1 (US/Canada), +44 (UK), +61 (Australia) or +64 (New Zealand), e.g. +14155550123"
  },
  "agent_callback_url": {
   "type": "string",
   "description": "https URL where the result is posted. Provide this or reply_email."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "success",
  "task_id",
  "task_status"
 ],
 "properties": {
  "message": {
   "type": "string"
  },
  "success": {
   "type": "boolean"
  },
  "task_id": {
   "type": "string",
   "description": "Reference for this task."
  },
  "task_status": {
   "enum": [
    "ACCEPTED"
   ],
   "type": "string"
  },
  "expected_delivery": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mosbie-human-agency-api-phone-call-task-fc510804/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.mosbie.com](https://www.zero.xyz/host/api.mosbie.com/llms.txt)