# Agent reply (API channel)



URL: https://getclickfix.com/docs/api-reference/api-channel/agent-reply-api-channel?lang=en

When an agent replies to a conversation on the API channel, ClickFix sends a `POST` with this body to the URL configured on the channel. The request carries `X-ClickFix-Timestamp`, `X-ClickFix-Signature` (the signing method above) and `Idempotency-Key` (the message UUID); process every key only once. Return `2xx` after the message is stored durably. Temporary failures are retried with increasing delays; `4xx` responses other than `408` and `429` count as permanent failures.


This page is the API reference generated from the OpenAPI schema; request and response schemas, examples and curl/Node.js/Go/PHP requests are on the HTML page. Shared rules: https://getclickfix.com/docs/api.md?lang=en