# Palmyr Phone Number Messages

> Palmyr Phone Number Messages is a paid API for AI agents from palmyr.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Send an SMS or message from a specific phone number managed by Palmyr's autonomous agent infrastructure, paying per-message with USDC.

## Facts

- Endpoint: GET https://palmyr.ai/phone/numbers/%7Bid%7D/messages
- Price: $0.02/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-messages-ab7278d6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qf8Y8UwgZe3x6YW0Ady22

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-messages-ab7278d6
```

Example prompt: Using my Palmyr phone number (ID: pn_abc123), send a text message to +14155550199 saying 'Your appointment is confirmed for tomorrow at 3pm' — pay the $0.02 USDC fee from my Base wallet.

## When to prefer this

Use this endpoint when an AI agent needs to send an outbound SMS from a specific Palmyr-managed phone number and is able to pay per-message in USDC on Solana or Base via the x402 protocol. Prefer this over traditional SMS APIs when operating in a crypto-native, autonomous agent context without traditional API key billing.

## Known failure modes

- Invalid phone number ID returns 404 not found
- Insufficient USDC balance or failed x402 payment returns 402 payment required
- Malformed recipient number returns 400 bad request
- Rate limiting on the number returns 429 too many requests
- Network error on Solana or Base chain delays payment confirmation

## How this service works

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

## Output

A confirmation response indicating the message was sent, including a message ID and delivery status for the outbound SMS sent from the specified Palmyr-managed phone number.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "properties": {
    "queryParams": {
     "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-messages-ab7278d6/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)