# Palmyr Phone Number Call Initiator

> Palmyr Phone Number Call Initiator 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).

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/calls
- 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-number-call-initiator-abf758d2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3cN6hDXFxP5edo2EIo6H0

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-initiator-abf758d2 -d '<json body>'
```

Example prompt: Place an outbound call from my Palmyr number (ID: pn_abc123) to +1-415-555-0198 — use my USDC on Base to cover the $0.02 call fee.

## When to prefer this

Use this endpoint when an AI agent needs to programmatically place outbound phone calls from a Palmyr-provisioned virtual number and can pay per-call in USDC via x402 micropayments on Solana or Base. Ideal for autonomous agents that need voice communication capabilities without a traditional telecom subscription.

## Known failure modes

- Invalid or non-existent phone number ID returns 404
- Insufficient USDC balance or failed x402 payment returns 402 Payment Required
- Malformed destination number returns 400 Bad Request
- Rate limiting or concurrent call limits returns 429 Too Many Requests
- Destination number unreachable returns a call failure status

## How this service works

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

## Output

Returns a call record with a call ID and status indicating that the call has been initiated from the specified Palmyr phone number, along with confirmation that the x402 micropayment of $0.02 USDC was processed.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "properties": {
    "queryParams": {
     "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-number-call-initiator-abf758d2/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)