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Trello Webhooks API

The Trello Webhooks API allows developers to receive real-time notifications when changes occur on Trello models such as boards, lists, and cards. Rather than polling the REST API for updates, webhooks push event data to a specified callback URL via HTTP POST requests containing JSON payloads. Webhook requests are signed with HMAC-SHA1 for verification, and webhooks are scoped to the permissions of the token used to create them.

Trello Webhooks API is one of 16 APIs that Trello publishes on the APIs.io network, described by an AsyncAPI event-driven specification.

Tagged areas include Event, Notification, Real-Time, and Webhook. The published artifact set on APIs.io includes API documentation and an AsyncAPI specification.

This event API exposes 1 operation across 1 channel, and defines 12 schemas. It is described by AsyncAPI 2.6.0, at version 1.

The API connects through a single server, https://api.trello.com/1 (https).

1 operations 1 channels 12 schemas

Metadata

The identity and technical contract details declared by the specification.

Specification
AsyncAPI 2.6.0
API Version
1
Base URL
https://api.trello.com
Resource Areas
1

Channels & Operations 1

Across 1 channel, the API surfaces 1 operation. Each is listed below with its action, channel, parameters, and response codes.

Channels 1
PUB
/webhook
Receive a Trello webhook event
receiveWebhookEvent body

Messages & Schemas 12

The contract defines 12 schemas that model the data carried by its messages. The most detailed are WebhookAction (7 properties), WebhookPayload (2 properties). Each schema is shown below with its type and property counts.

BoardEvent
message
An action that occurred on a board, such as creating, updating, closing, or deleting a board.
CardEvent
message
An action that occurred on a card, such as creating, updating, moving, archiving, or deleting a card.
ListEvent
message
An action that occurred on a list, such as creating, renaming, archiving, or moving a list.
MemberEvent
message
An action involving a member, such as adding or removing a member from a board or card.
ChecklistEvent
message
An action involving a checklist or check item, such as creating a checklist, adding a check item, or completing a check item.
OrganizationEvent
message
An action that occurred on an organization (workspace), such as updating settings or managing members.
LabelEvent
message
An action involving a label, such as creating, updating, or deleting a label, or adding or removing a label from a card.
CommentEvent
message
An action involving a comment on a card, such as adding, updating, or deleting a comment.
AttachmentEvent
message
An action involving an attachment, such as adding or removing an attachment from a card.
CustomFieldEvent
message
An action involving custom fields, such as creating a custom field definition or setting a custom field value on a card.
WebhookPayload
object
The top-level payload delivered to a webhook callback URL. Contains the action that triggered the webhook and the current state of the watched model.
2 properties 2 required
WebhookAction
object
Represents the action (event) that triggered the webhook callback.
7 properties 4 required

Specification

The full machine-readable AsyncAPI contract behind this narrative.

Source

trello-webhooks-asyncapi.yml Raw ↑

Other APIs Trello publishes across the network.

Trello Power-Ups
trello Actions API
trello Boards API
trello Cards API
trello Checklists API
trello CustomFields API
trello Labels API
trello Lists API
trello Members API
trello Notifications API
trello Organizations API
trello Plugins API
Where this information came from

This is an independent, third-party profile of Trello Webhooks API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

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