> For the complete documentation index, see [llms.txt](https://docs.vapinetwork.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vapinetwork.ai/call/for-buyers-and-agents/make-a-phone-call.md).

# Make a phone call from an agent

Call is launching; this guide shows how an agent finds and pays the documented StablePhone listing with x402.

{% hint style="info" %}
Call is launching. The console does not serve Call yet; this page describes the launch flow.
{% endhint %}

This page is for agent owners who want an agent to find and pay the documented StablePhone listing through vAPI Call.

## What the caller needs

Provide these values to the agent:

| Value         | Requirement                                            |
| ------------- | ------------------------------------------------------ |
| Destination   | A US or Canadian number in `+1` format                 |
| Task          | What the voice agent should say and do during the call |
| Agent account | A linked local account funded with enough USDC on Base |

Fund the account before the run:

```bash
vapi fund --account <name>
```

StablePhone refuses numbers on the Do-Not-Call list.

## Find, inspect, and pay

Connect the local `vapi mcp` server to the agent. The agent uses these vAPI Call tools in order:

| Tool           | Agent action                                                                                 |
| -------------- | -------------------------------------------------------------------------------------------- |
| `call.search`  | Search for `StablePhone` and select the partner listing returned by Call.                    |
| `call.inspect` | Read the `call_phone` request contract and live x402 quote.                                  |
| `call.pay`     | Send the destination and task to the inspected listing, subject to the account's spend caps. |

If `call.search` does not return StablePhone, it is not available in Call's eligible listed results. Do not substitute an undocumented phone path.

The StablePhone request body has two fields: `phone_number` contains the `+1` destination, and `task` contains the voice agent's instructions. The listed endpoint is a `POST` request.

StablePhone's seeded price is $0.54 USDC on Base per call. The live x402 quote remains the source of truth. Payment settlement starts the call, and the response returns a `call_id`.

Only the paying wallet can read the transcript through StablePhone's status endpoint. The public sources do not specify that endpoint's URL or request shape.

## Next

* [Pay with vapi](/call/for-buyers-and-agents/pay-with-vapi.md)
* [Use vAPI in Claude, Cursor and Codex](https://docs.vapinetwork.ai/agents/in-your-ai-app/use-vapi-in-claude-cursor-and-codex)
* [Receipts and retries](/call/for-buyers-and-agents/receipts-and-retries.md)

Checked on 2026-10-02.


---

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