Trello uses a RESTful API (Representational State Transfer). This means that Trello's API follows the principles of REST, which is an architectural style for designing networked applications. A RESTful API allows clients to access and manipulate web resources via standard HTTP methods such as GET, POST, PUT, DELETE, etc.
REST APIs are stateless, meaning each request from client to server must contain all the information needed to understand and complete the request. The server should not store anything about the latest HTTP request the client made. Each request is treated independently.
Here's a brief overview of how you might interact with Trello's RESTful API:
To retrieve information from Trello, you would typically use a GET request. For example, to get details about a specific board, you could make a request like this:
GET https://api.trello.com/1/boards/{id}
To create new items, such as adding a new card to a list, you would use a POST request. Here's an example:
POST https://api.trello.com/1/cards
To update existing items, you would use a PUT request. For instance, to change the name of a card:
PUT https://api.trello.com/1/cards/{id}/name
Finally, to delete items, you would use a DELETE request. To remove a card, for example:
DELETE https://api.trello.com/1/cards/{id}
Each of these operations requires proper authentication, typically handled through OAuth tokens, which allow your application to securely access Trello's API on behalf of a user.
For more detailed information, including how to authenticate and the full range of capabilities offered by Trello's API, refer to the official Trello Developer Documentation: Trello Developer Portal
RESTful APIs like Trello's are widely used due to their simplicity, scalability, and stateless nature, making them a good choice for web services that need to be easily accessible across the internet.
Yes, the Trello API supports webhooks. Webhooks allow developers to receive notifications when a model within Trello changes. These models can include members, cards, boards, or other entities that actions can apply to. When an event occurs involving the monitored model, a webhook is triggered, sending an HTTP POST request to a specified callback URL with details about the action and the updated model.
To use webhooks, you need to:
Trello will disable webhooks that experience consecutive failures for 30 days without a successful event sending. Failures can occur due to issues like the callback endpoint not responding correctly or the webhook's token losing access to the monitored model.
Here's an example of creating a webhook using jQuery's $.post method:
$.post("https://api.trello.com/1/tokens/{APIToken}/webhooks/?key={APIKey}", { description: "My first webhook", callbackURL: "http://www.mywebsite.com/trelloCallback", idModel: "4d5ea62fd76aa1136000000c", // ID of the model to watch });
Replace {APIToken}, {APIKey}, callbackURL, and idModel with your specific values.
The Trello API imposes several rate limits to prevent strain on its servers:
/1/members/ are further restricted to 100 requests per 900 seconds. This is part of Trello's measures to ensure responsible usage of resources that involve user account information.Rate Limit Headers: Trello includes rate limit information in the headers of its API responses. These headers indicate the time interval of the limit (in milliseconds), the maximum number of requests allowed (max), and the remaining request count for the given interval (remaining). Monitoring these headers can help applications stay within the rate limits.
Example of rate limit headers in a response:
x-rate-limit-api-token-interval-ms: 10000
x-rate-limit-api-token-max: 100
x-rate-limit-api-token-remaining: 99
x-rate-limit-api-key-interval-ms: 10000
x-rate-limit-api-key-max: 300
x-rate-limit-api-key-remaining: 299
Staying Under the Limit: To avoid hitting the rate limits, Trello suggests reducing polling frequency and considering the use of webhooks instead of continuous API polling. Webhooks allow for event-driven updates without the need for frequent API calls, thus helping to stay under the rate limits.
By understanding and adhering to these rate limits and employing best practices, developers can ensure smooth and uninterrupted access to the Trello API for their applications.
The most recent version of the Trello API, as indicated by the provided sources, does not explicitly state a version number like v1, v2, etc., which is common in many APIs. Instead, the documentation and changelogs focus on features, deprecations, and changes within the existing API structure.
However, the API calls shown in the guides and examples use a base URL that starts with https://api.trello.com/1/, suggesting that the current version being referenced is version 1 of the Trello API. This is consistent across the examples given for making API calls, such as retrieving boards or members' information:
curl 'https://api.trello.com/1/boards/{idBoard}?key={yourKey}&token={yourToken}' curl 'https://api.trello.com/1/members/me/boards?key={yourKey}&token={yourToken}'
Given this information, it's reasonable to conclude that the most recent version of the Trello API being actively developed and maintained, as of the latest updates provided in July 2024, is still version 1. This version encompasses all the functionalities, endpoints, and features described in the Trello API documentation, including those related to boards, members, actions, and more.
It's important to note that while the major version might remain the same, the Trello API continuously evolves with new features, deprecations, and changes as indicated by the changelog entries. Developers should regularly consult the official Trello API documentation and changelog for the most up-to-date information and best practices for integrating with Trello.
Create a new Trello account or log in to your existing one at the Trello homepage.
Use your API key and token to make requests to the Trello API. For example, to get all boards associated with your user:
curl 'https://api.trello.com/1/members/me/boards?key={yourKey}&token={yourToken}'
Replace {yourKey} and {yourToken} with your actual API key and token values.
The Trello API provides access to several data models that represent different aspects of Trello's functionality. Here's a breakdown of the primary data models you can interact with using the Trello API:
Each of these data models plays a crucial role in the functionality of Trello, and the API provides extensive capabilities to interact with them programmatically. This allows developers to integrate Trello with other applications, automate workflows, and extend Trello's functionality to meet specific needs.
