Trello Board Summarization with GPT-5-Nano - n8n Workflow

Project Managers needing quick, automated board summaries.
Team Leads requiring daily or weekly executive reports on project status.
Automation Specialists looking for advanced examples of n8n templates integrating Trello and AI.
Users seeking to leverage the OpenAI n8n node for data processing and text generation.

Manually reviewing large Trello boards to generate status reports is time-consuming and prone to oversight. This n8n workflow solves this by fully automating the extraction, transformation, and summarization process. It starts by pulling all critical data—boards, lists, card names, and card descriptions—from a specified Trello board. This raw data is then compiled and sent to the OpenAI Chat Model (specifically configured to use the efficient gpt-5-nano model) via a LangChain Agent n8n node. The result is a concise, AI-generated summary of the board's contents, providing immediate, actionable insights without manual effort. This specific n8n workflow demonstrates the immense power of integrating project management tools with cutting-edge AI capabilities.

This automation is executed manually using the initial n8n trigger.

1. Trigger and Board ID Retrieval: The workflow starts with the manual n8n trigger, initiating the process. The Get Board Trello n8n node immediately fetches the ID and details for the configured Trello board URL.


2. Data Collection: The board ID is then used by the Get Lists n8n node to retrieve all lists on that board. Subsequently, the Get Cards n8n node retrieves all tasks (cards) associated with those lists.


3. Data Mapping: The Map Fields (Set) n8n node is crucial for structuring the data. It maps key fields from the card output (Task Name, Task Description) and dynamically pulls related context (Board Name, List Name) from the upstream Trello n8n nodes, ensuring all data necessary for summarization is present.


4. Data Consolidation: The Combine into One (Aggregate) n8n node collects all mapped item data into a single, cohesive document payload. This single item contains the complete context of the Trello board.


5. AI Summarization: This combined payload is passed to the Summarize Tasks (LangChain Agent) n8n node. This agent, leveraging the powerful OpenAI Chat Model (using gpt-5-nano), applies the instruction 'Summarize this board' to generate a final, high-level summary. This n8n workflow is a perfect example of intelligent data processing.

To deploy and run this powerful n8n workflow successfully, follow these steps for credential setup:

1. Import the n8n Workflow

1. Copy the entire n8n workflow JSON provided.


2. In your n8n instance, go to the Workflows section and click 'New'.


3. Select 'Import from JSON' and paste the copied data.

2. Configure Trello Credentials

1. Obtain your Trello API Key and Token by visiting the Trello Developer API page.


2. In n8n, navigate to Credentials → New → Trello API.


3. Paste your API Key and Token and save the credential.


4. Open the Get Board, Get Lists, and Get Cards n8n nodes and select the newly created Trello credential.


5. Crucially, open the Get Board n8n node. Change the 'ID' field mode to 'URL' and paste the URL of the specific Trello board you wish to summarize.

3. Configure OpenAI Credentials

1. Ensure you have an active OpenAI billing account and fund added, as this n8n workflow requires usage of the API.


2. Generate a new API key from the OpenAI Platform.


3. In n8n, navigate to Credentials → New → OpenAI API Key.


4. Paste your API key and save the credential. This credential will automatically be used by the OpenAI Chat Model n8n node in the flow.

This n8n workflow relies on several specialized n8n nodes to achieve its goal:

When clicking ‘Execute workflow’ (Manual Trigger): The starting n8n trigger for the entire operation, allowing immediate execution for testing or on-demand summaries.
Get Board / Get Lists / Get Cards (Trello n8n node): These three Trello n8n nodes work sequentially to retrieve all structural and detailed data. The Get Board node is configured with the target board URL for easy setup.
Map Fields (Set n8n node): Functionally, this node aggregates the board name, list name, task name, and task description from various preceding Trello n8n node outputs, consolidating the context required for AI summarization.
Combine into One (Aggregate n8n node): Ensures that all individual mapped items are merged into a single item. This is mandatory for providing the entire Trello board context to the subsequent AI node.
OpenAI Chat Model (LangChain Chat OpenAI n8n node): This n8n node is the core intelligence provider. It is configured to use the fast and cost-effective gpt-5-nano model, providing the language model backbone for the LangChain agent.
Summarize Tasks (LangChain Agent n8n node): This n8n node manages the prompt and interaction with the language model. Its primary function is to interpret the combined Trello data and apply the 'Summarize this board' instruction, generating the final output of this powerful n8n template.