Zernio
Zernio
API Reference

WhatsApp

Templates

List templatesGETCreate templatePOSTGet templateGETUpdate templatePATCHDelete templateDELETEGet template by idGETUpdate template by idPATCHDelete template by idDELETELook up a library templateGET

Business Profile

Get business profileGETUpdate business profilePOSTUpload profile picturePOSTGet display name statusGETRequest display name changePOSTGet business usernameGETGet username suggestionsGETSet business usernamePOSTDelete business usernameDELETE

Groups

List active groupsGETCreate groupPOSTGet group infoGETUpdate group settingsPOSTDelete groupDELETEAdd participantsPOSTRemove participantsDELETECreate invite linkPOSTList join requestsGETApprove join requestsPOSTReject join requestsDELETE

Blocking

Check if a user is blockedGETList blocked usersGETBlock usersPOSTUnblock usersDELETE

Media

Download WhatsApp mediaGET

Conversions

Get CTWA conversions datasetGETProvision CTWA datasetPOSTList conversion eventsGETSend WhatsApp conversion eventPOST

Account Events

List account notificationsGET

Phone Numbers

Get number statusGETRegister a connected WhatsApp number on the Cloud APIPOSTMove a number to another profilePATCHRequest a Meta re-verification code for a BYO WhatsApp numberPOSTVerify the Meta re-verification code for a BYO WhatsApp numberPOST

Calling

Get calling config for an accountGETEnable calling on a numberPOSTUpdate calling configPATCHDisable calling on a numberDELETECheck call permissionGETList call history for an accountGETInitiate outbound callPOSTGet a single callGETEstimate per-minute costGETGet calling config for a numberGETGet a call recordingGETStart caller-ID verification for a customer-brought numberPOSTConfirm the caller-ID verification codePOST

Flows

List flowsGETCreate flowPOSTGet flowGETUpdate flowPATCHDelete flowDELETEGet flow JSON assetGETUpload flow JSONPUTGet flow preview URLGETList flow versionsGETPublish flowPOSTDeprecate flowPOSTSend flow messagePOSTList flow responsesGETGet Flows encryption key statusGETRegister a Flows encryption keyPOST

Sandbox

List your sandbox sessionsGETStart a sandbox activationPOSTRevoke a sandbox sessionDELETE
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WhatsApp

List conversion events

Returns the most recent conversion events sent through POST /v1/whatsapp/conversions for the given WhatsApp account. Sourced from delivery logs (Axiom late dataset), so the visible window is bounded by log retention (about 30 days). Useful for rendering a "recent activity" panel on the conversions setup tab without standing up a parallel persistence layer.

Per-event payload mirrors the structured log we write on every successful send: eventName, conversationId, eventsReceived, eventsFailed, traceId, durationMs, and the wall-clock timestamp.

GET
/v1/whatsapp/conversions

Authorization

bearerAuth
AuthorizationBearer <token>

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

In: header

Query Parameters

accountId*string

WhatsApp account ID

limit?integer

Max events to return (1-200, default 50).

Range1 <= value <= 200
Default50

Response Body

application/json

application/json

{  "events": [    {      "timestamp": "2019-08-24T14:15:22Z",      "eventName": "string",      "conversationId": "string",      "eventsReceived": 0,      "eventsFailed": 0,      "traceId": "string",      "durationMs": 0    }  ]}
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Provision CTWA dataset

Creates (or fetches, if one already exists) the Meta dataset that Click-to-WhatsApp ad events are reported against via the Conversions API, and persists its ID on the account as `metadata.metaCapiDatasetId`. The call is GET-first idempotent: a WABA can only own one CTWA dataset, so a second call after a successful provision is a safe no-op that returns the same ID with `created: false`. Requires the connected WhatsApp account's token to carry the `whatsapp_business_manage_events` permission. If the permission is missing the endpoint returns 422 with a message asking the user to reconnect the account.

Send WhatsApp conversion event

Forward a WhatsApp Business Messaging conversion event (`LeadSubmitted`, `Purchase`, `AddToCart`, `InitiateCheckout`, `ViewContent`) to Meta's Conversions API with `action_source = business_messaging` and `messaging_channel = whatsapp`. The endpoint looks up the originating CTWA click ID (`ctwa_clid`) captured on the first inbound message of the conversation and replays it on every event so Meta can attribute the conversion back to the Click-to-WhatsApp ad that drove the chat. Configuration prerequisite on the WhatsApp account metadata: - `metaCapiDatasetId`: the Meta dataset ID linked to the WABA. Provision one with `POST /v1/whatsapp/dataset`. The WABA ID (already set automatically at connect time) is forwarded as `user_data.whatsapp_business_account_id`, which is the per-channel attribution identifier Meta requires for WhatsApp events. No Facebook Page ID is needed (that field is the Messenger-branch identifier). Identify the conversation by either `conversationId` (preferred) or `phoneE164` (digits only, no `+`). At least one is required. If the conversation has no captured `ctwa_clid`, the request returns 422 because there is nothing to attribute. Token and dataset coupling: the WhatsApp account's accessToken must have access to the configured `metaCapiDatasetId`. By default a WABA's system-user token is scoped to the WABA's own Business Manager and cannot post to a pixel owned by a different Business; Meta returns code 100 in that case. Either share the dataset with the WhatsApp app's Business in BM, or use a dataset already in the same Business as the WABA.