# Palmyr Phone Call Hangup

> Palmyr Phone Call Hangup is a paid API for AI agents from palmyr.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Terminates an active phone call by its call control ID via the Palmyr AI agent infrastructure.

## Facts

- Endpoint: POST https://palmyr.ai/phone/calls/%7BcallControlId%7D/hangup
- Price: $0.02/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-hangup-59a35617
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u4FOzwA1fkQNEQzCDPBE5

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-hangup-59a35617 -d '<json body>'
```

Example prompt: Please hang up the active call with control ID abc123 — it's gone on long enough and I need it terminated now.

## When to prefer this

Use this endpoint when you need to programmatically terminate a live phone call that was initiated via Palmyr's AI agent infrastructure and you have the call's control ID. Prefer this over alternative telephony solutions if you are already using Palmyr for call management and paying via USDC on Solana or Base.

## Known failure modes

- Invalid or expired callControlId returns a 404 or error response
- Call already ended — attempting to hang up a completed call may return an error
- Insufficient USDC balance causes payment failure and request rejection
- Authentication or payment header missing results in 402 Payment Required
- Network or infrastructure errors may cause the hangup to fail silently

## 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 provided callControlId has been hung up and the session terminated. May include call status or a success acknowledgment.

## 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-hangup-59a35617/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)