---
title: "Zacx Public API"
description: "The Zacx Public API lets you send WhatsApp Business API messages, look up\nand update contacts, tag and assign them, and pull reports and wallet\ncredits for your workspace.\n\n**Authentication.** Every request carries your workspace API key as a\nbearer token: `Authorization: Bearer <your-api-key>`. Find or generate the\nkey in the Zacx dashboard under **Settings → API**.\n\n**Phone numbers.** Always include the country code, for example\n`919999999999` for an Indian number. Endpoints that accept a leading `+`\nsay so.\n\n**Responses.** Successful calls return `\"status\": \"success\"` with the\nresult under `data` or a human-readable `message`. Failures return\n`\"status\": \"error\"` with a stable `code` you can branch on and a `message`\nfor logs.\n"
---

> Documentation Index
> Fetch the complete documentation index at: https://zacx.io/llms.txt
> Use this file to discover all available pages before exploring further.

The Zacx Public API lets you send WhatsApp Business API messages, look up
and update contacts, tag and assign them, and pull reports and wallet
credits for your workspace.

**Authentication.** Every request carries your workspace API key as a
bearer token: `Authorization: Bearer <your-api-key>`. Find or generate the
key in the Zacx dashboard under **Settings → API**.

**Phone numbers.** Always include the country code, for example
`919999999999` for an Indian number. Endpoints that accept a leading `+`
say so.

**Responses.** Successful calls return `"status": "success"` with the
result under `data` or a human-readable `message`. Failures return
`"status": "error"` with a stable `code` you can branch on and a `message`
for logs.

Version: 1.0

## Servers

- `https://api.zacx.io/v1`

## Sections

- [Messages](/api/tags/Messages)
- [Chats](/api/tags/Chats)
- [Contacts](/api/tags/Contacts)
- [Custom Fields](/api/tags/Custom-Fields)
- [Users](/api/tags/Users)
- [Tags](/api/tags/Tags)
- [Reports](/api/tags/Reports)
- [Wallet](/api/tags/Wallet)


Source: https://zacx.io/api/index.md