public
GET /v1/public/chat/{publicKey}/conversations/{conversationId}/messages
Anything said since the visitor's cursor.
Authentication
This endpoint is public. It takes no credential and no organisation — it is what our own marketing site and AI answer engines read.
This endpoint takes no organisation id. Your key already identifies the organisation it belongs to, and the response is scoped to it.
Try it
Replace anything in angle brackets with your own values, and the key placeholder with a key from your dashboard.
curl -X GET https://api.zinndigital.com/v1/public/chat/{publicKey}/conversations/{conversationId}/messagesSigned in? The API console in your dashboard fills in your real organisation id and your own key, and runs the request against the live API so you can see the actual response. Open this endpoint in the API console
Details
Anonymous, authorised by X-Zinn-Chat-Token. Returns immediately — empty if there is nothing — and tells the caller when to ask again in pollAfterMs. ⛔ This endpoint does not hold the connection open, and no future version of it should. The engine is WSGI with a small fixed number of concurrent request slots, so a long-poll or an SSE stream here would consume a share of the entire platform's capacity per open chat. When concurrency outgrows short-polling, chat moves to its own ASGI service — it does not become a socket on this one. ⭐ pollAfterMs is decided by the server, never by the widget. A cadence baked into a JavaScript file is cached on somebody else's site behind somebody else's CDN, so the one number governing fleet-wide load would be the one number we could not change.
Parameters
| Name | Type | Required | What it is |
|---|---|---|---|
publicKey (path) | string | Yes | The widget's public key. Public by design — it ships in the page source of every site that embeds the widget — so it NAMES a widget and authorises nothing; the Origin header is… |
conversationId (path) | string | Yes | — |
after (query) | integer | No | The highest seq the caller already has. A per-conversation counter, not a timestamp: two messages written in the same millisecond are indistinguishable by clock, so a time… |
Response
| Name | Type | Required | What it is |
|---|---|---|---|
state | string<ai, waiting, open, offline, closed> | Yes | — |
cursor | integer | Yes | — |
poll_after_ms | integer | Yes | How long the widget should wait before asking again. Decided by the SERVER on every response, because a cadence baked into the widget is cached on somebody else's site behind… |
messages | ChatMessage[] | Yes | — |
Errors this endpoint can return
404 · 429