Vector Centroid API

Calculate the coordinate-wise mean of a nonempty set of numeric vectors through a GET endpoint.

Use

Enable either format and copy its webhook URL. Send the vectors query parameter as URL-encoded JSON:

curl --get --data-urlencode 'vectors=[[2,3,4],[4,5,6],[6,7,8]]' 'YOUR_WEBHOOK_URL'

The response is:

{"centroid":[4,5,6]}

Each vector must be an array, all vectors must have the same number of coordinates, and every coordinate must be a finite JSON number. Numeric strings are rejected. A set of zero-dimensional vectors, such as [[],[]], returns {"centroid":[]}. Arithmetic uses JavaScript floating-point numbers.

Missing or malformed input returns an error object, for example:

{"error":"Vectors have inconsistent dimensions."}

Both successful calculations and validation errors use HTTP 200 with a JSON body, matching the source’s response pattern. Inspect the body for error. The workflow makes no external service calls and stores no vector history.

Changes to the source

• Parse the JSON query parameter explicitly and make GET/JSON response settings explicit.
• Validate vector rows and finite numeric coordinates before computing.
• Scale each coordinate before averaging and use compensated summation to handle large values and equal subnormal values.
• Replace the source’s deployed example URL with a setup placeholder.

Adapted from Calculate the Centroid of a Set of Vectors in Zie619/n8n-workflows. The source export does not identify a separate template author or license.

The collection’s MIT notice is pinned at a later revision. This is the collection notice at that revision; it does not establish a separate original template author’s license. Our changes are listed above; see repository licensing.

MIT License

Copyright (c) 2025 Zie619

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

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