Zernio
Zernio
API Reference

Messages

Conversations

List conversationsGETSearch conversationsGETCreate conversationPOSTGet conversationGETUpdate conversation statusPUTMark a conversation as readPOSTHand a conversation to or from Meta Business AgentPOST

Messages

List messagesGETSend messagePOSTEdit messagePATCHDelete messageDELETEUpload media filePOSTResolve message attachmentGET

Reactions & Typing

Add reactionPOSTRemove reactionDELETESend typing indicatorPOST
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Messages

Delete message

Delete a message from a conversation. Platform support varies:

  • Telegram: Full delete (bot's own messages anytime, others if admin)
  • X: Full delete (own DM events only)
  • Bluesky: Delete for self only (recipient still sees it)
  • Reddit: Delete from sender's view only
  • 'iMessage: Unsend (the bubble disappears for the recipient) within 2 minutes of sending (Apple''s limit; 409 unsend_window_expired after that). Own outbound messages only.'
  • Facebook, Instagram, WhatsApp: Not supported (returns 400)
DELETE
/v1/inbox/conversations/{conversationId}/messages/{messageId}

Authorization

bearerAuth
AuthorizationBearer <token>

API key authentication: send your Zernio API key in the Authorization header, prefixed with Bearer.

In: header

Path Parameters

conversationId*string

The conversation ID

messageId*string

The platform message ID to delete

Query Parameters

accountId*string

Account ID

Response Body

application/json

application/json

import Zernio from '@zernio/node';const zernio = new Zernio({ apiKey: process.env.ZERNIO_API_KEY });const { data } = await zernio.messages.deleteInboxMessage({  path: {    conversationId: 'conversation_abc123',    messageId: 'message_abc123',  },  query: {    accountId: 'account_abc123',  },});console.log(data);
{  "success": true}
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Edit message

Edit a previously sent message. Platform support: - Telegram: text and/or reply markup, any time - 'iMessage: text only, within 15 minutes of sending (Apple''s limit; 409 `edit_window_expired` after that). Group messages included. The stored message keeps its edit history.' - All others: returns 400

Upload media file

Upload a media file using API key authentication and get back a publicly accessible URL. The URL can be used as attachmentUrl when sending inbox messages. Files are stored in temporary storage and auto-delete after 7 days. Maximum file size is 25MB. Unlike /v1/media/upload (which uses upload tokens for end-user flows), this endpoint takes your API key in the Authorization header, for programmatic use.