# Palmyr Phone Call Recording

> Palmyr Phone Call Recording 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).

Starts or controls a call recording session for an active phone call identified by its call control ID.

## Facts

- Endpoint: POST https://palmyr.ai/phone/calls/%7BcallControlId%7D/record
- 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-recording-ac6dd25d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hYQel3pQnv_ZeRfsUepw-

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-recording-ac6dd25d -d '<json body>'
```

Example prompt: Start recording the active phone call with control ID abc123 on Palmyr right now so we can capture and store the conversation.

## When to prefer this

Use this endpoint when you need to programmatically start recording an in-progress phone call managed through Palmyr's autonomous AI infrastructure, paying per-call with USDC via x402. Best suited for AI agents that manage voice calls and need to capture audio for compliance, transcription, or review purposes.

## Known failure modes

- Invalid or expired callControlId returns a 404 or error response
- Call is no longer active or has already ended — recording cannot be started
- Payment of 0.1 USDC not authorized or insufficient balance — 402 Payment Required
- Duplicate recording attempt on already-recording call may return conflict error
- Malformed callControlId path parameter causes 400 Bad Request

## How this service works

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

## Output

A confirmation that the recording has been initiated for the specified call, including a recording session ID or status indicating the recording is underway.

## 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-recording-ac6dd25d/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)