# Palmyr Phone Number Call

> Palmyr Phone Number Call is a paid API for AI agents from palmyr.ai, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

Initiates an outbound phone call from a provisioned Palmyr phone number, paid per-call via USDC on Solana or Base using x402.

## Facts

- Endpoint: POST https://palmyr.ai/phone/numbers/%7Bid%7D/call
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/palmyr-phone-number-call-1f977a20
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2JSI_MNT0UaaVCmSI1BlR

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-number-call-1f977a20 -d '<json body>'
```

Example prompt: Using my Palmyr phone number (ID: pn_abc123), please place a call to +1-415-555-0199 right now — I need my AI agent to reach that contact.

## When to prefer this

Use this endpoint when an AI agent needs to programmatically place an outbound phone call from a specific provisioned Palmyr number, especially in workflows where crypto-native payments (USDC on Solana or Base) are preferred over traditional billing. Ideal for autonomous agents that need to reach humans by voice without manual intervention.

## Known failure modes

- Invalid phone number ID returns 404 not found
- Insufficient USDC balance or failed x402 payment returns 402 payment required
- Malformed destination number returns 400 bad request
- Phone number not provisioned or inactive returns 403 forbidden
- Downstream carrier failure returns 503 service unavailable

## How this service works

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

## Output

Returns a call record including call ID, status (e.g. initiated, ringing, in-progress), the source phone number ID, destination number, and timestamp. Payment of $0.10 USDC is charged per call via x402 on Solana or Base.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/palmyr-phone-number-call-1f977a20/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)