# Palmyr Phone Call Transfer

> Palmyr Phone Call Transfer is a paid API for AI agents from palmyr.ai, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

Transfers an active phone call to a new destination using a call control ID, billed at $0.10 USDC per call via x402.

## Facts

- Endpoint: POST https://palmyr.ai/phone/calls/%7BcallControlId%7D/transfer
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/palmyr-phone-call-transfer-b9c2690a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WDiZQvEC8QdnfUIn4Bqun

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 palmyr-phone-call-transfer-b9c2690a -d '<json body>'
```

Example prompt: Transfer the active call with control ID abc123 to +1-415-555-0192 right now.

## When to prefer this

Use this endpoint when you need to programmatically transfer an active, in-progress phone call to a new destination within Palmyr's AI agent infrastructure, especially when paying via USDC on Solana or Base through the x402 protocol.

## Known failure modes

- Invalid or expired callControlId returns an error indicating the call cannot be found
- Destination number is unreachable or invalid, causing transfer failure
- Insufficient USDC balance to cover the $0.10 per-call fee results in payment rejection
- Call has already ended before transfer is attempted
- Network or infrastructure error causes the transfer to fail mid-execution

## How this service works

Autonomous infrastructure for AI agents — pay with USDC on Solana or Base via x402.

## Output

A confirmation that the call identified by the callControlId has been transferred to the specified destination, along with updated call status or routing details.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "properties": {
    "body": {
     "type": "object",
     "additionalProperties": true
    }
   }
  },
  "output": {
   "properties": {
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/palmyr-phone-call-transfer-b9c2690a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from palmyr.ai](https://www.zero.xyz/host/palmyr.ai/llms.txt)