---
title: "Estimate per-minute cost"
method: GET
path: "/v1/whatsapp/calls/estimate"
tags: ["WhatsApp Calling"]
---

# Estimate per-minute cost

`GET /v1/whatsapp/calls/estimate`

## Request

- Base URL: `https://zernio.com/api`
- URL: `https://zernio.com/api/v1/whatsapp/calls/estimate`
- Auth: HTTP bearer

Returns a zero-markup estimated cost for an outbound call to the
given destination, broken down by Meta + Telnyx + recording line
items. Costs are pass-through, no margin applied.

## Query parameters

- `accountId` string, required
- `to` string, required
- `minutes` integer
- `recording` boolean

## Response `200`

Estimate

- object
  - `destinationCountry` string, nullable
  - `perMinuteUsd` number
  - `breakdown` object
    - `metaMinutes` integer
    - `metaCostUSD` number: Estimated Meta per-minute charge, billed by Meta directly to your WABA. Display only; not billed by Zernio.
    - `telnyxCostUSD` number
    - `recordingCostUSD` number
    - `billableCostUSD` number: Estimated amount Zernio bills you = Telnyx leg + recording (excludes Meta).
    - `totalCostUSD` number: Estimated full cost incl. the Meta portion you pay directly. Display only.

## Other responses

- `401`: Missing or invalid API key. `code` is `missing_credentials` when no Authorization header was sent and `invalid_credentials` when the key is unknown, revoked or expired.

## Changes

- **2026-10-06** `f8c8f34fb41a`: 1 warning
  - added the new `account` enum value to the `details/budgetScope` response property for the response status `401`
- **2026-10-02** `d556591af3f6`: 7 info
  - added the optional property `code` to the response with the `401` status
  - added the optional property `details` to the response with the `401` status
  - added the optional property `docUrl` to the response with the `401` status
  - added the optional property `param` to the response with the `401` status
  - …3 more

[Operation history](https://skmtc.dev/zernio/apis/zernio-api/changes/v1/whatsapp/calls/estimate/get.md)

---

[API](https://skmtc.dev/zernio/apis/zernio-api.md) · [All operations](https://skmtc.dev/zernio/apis/zernio-api/llms.txt) · [OpenAPI document](https://skmtc.dev/zernio/apis/zernio-api/revisions/4e74db179e73?raw)