---
title: "Estimate call cost"
method: GET
path: "/v1/messaging/voice/calls/estimate"
tags: ["Voice"]
---

# Estimate call cost

`GET /v1/messaging/voice/calls/estimate`

## Request

- Base URL: `https://apihub.co.il`
- URL: `https://apihub.co.il/v1/messaging/voice/calls/estimate`
- Auth: HTTP bearer

Pre-call cost estimate for a PSTN call: the carrier leg plus optional
recording and transcription add-ons. Same billing formula as the
post-call invoice, so the quote and the final charge can't disagree.
The per-minute figure is deliberately conservative (the real cost
comes from the settled carrier record after the call), so estimates
trend slightly over the actual invoice. Parity endpoint of
`GET /v1/whatsapp/calls/estimate`, minus the Meta line (PSTN calls
have no separate Meta bill, so `totalCostUSD` equals
`billableCostUSD`).


**Billing:** Read (free unless it says otherwise) · **Rate limit:** 120/min

## Query parameters

- `to` string, required: Destination number, E.164 (leading + optional).
- `from` string: The number the call would dial from, E.164. When it is verified on a Branded Calling identity and `to` is a US number, the estimate includes the per-call Branded Calling surcharge.
- `minutes` integer
- `recording` boolean
- `transcription` boolean

## Headers

- `Idempotency-Key` string
- `X-Tag` string

## Response `200`

Completed

- object
  - `id` string: Execution id — stable across internal retries; use it with GET /v1/executions/{id}
  - `status` 'pending' | 'processing' | 'completed' | 'partial' | 'failed' | 'cancelled' | 'timeout'
  - `operation` string
  - `tag` string, nullable: Your X-Tag, if sent
  - `created_at` string, date-time
  - `completed_at` string, date-time, nullable
  - `output` object: Operation result (see each operation). While a Studio render is processing: `stage` (queued · transcribing · downloading · preparing · cleaning_voice · mixing_audio · rendering · finishing), `phase` (the engine's: download · prepare · voice · audio · encode · qa · upload, or null), `progress` (a percent, 0–100) and `progress_fraction` (0–1), `eta_seconds` (seconds left, never below 0) and `estimate_seconds`
    - `minutes` integer
    - `breakdown` object
      - `totalCostUSD` number: Equals billableCostUSD (no separate Meta bill on PSTN); kept for shape parity with the WhatsApp estimate.
      - `telnyxCostUSD` number
      - `brandedCallUSD` number: Branded Calling surcharge, 0 unless `from` is a verified branded number calling a US destination.
      - `billableCostUSD` number: What Zernio bills for the call.
      - `recordingCostUSD` number
      - `transcriptionCostUSD` number
    - `perMinuteUsd` number: Billable cost per minute for the requested options.
    - `destinationCountry` string, nullable
  - `error` string, nullable
  - `usage` object
    - `credits_charged` number, nullable
    - `credits_reserved` number
    - `estimated_credits` number
    - `cost_source` 'provider_reported' | 'calculated' | 'estimated' | 'null', nullable
    - `provider_usage` object, nullable: Normalised consumption, e.g. { VIDEO_SECOND: 22.4 }
  - `balance` object
    - `available` number
    - `reserved` number

## Other responses

- `400`: Invalid input
- `402`: Insufficient credits / project budget
- `404`: Resource not found (or not yours)
- `429`: Rate limited
- `503`: Service temporarily paused

---

[API](https://skmtc.dev/apihub/apis/apihub-one-api-for-chat-image-video-ai.md) · [All operations](https://skmtc.dev/apihub/apis/apihub-one-api-for-chat-image-video-ai/llms.txt) · [OpenAPI document](https://skmtc.dev/apihub/apis/apihub-one-api-for-chat-image-video-ai/revisions/a8caa42835ce?raw)