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The Allen Institute for Brain Science offers access to its published data through an application programming interface (API). The API, documentation, sample applications, and 2012 Allen Brain Atlas Hackathon materials are made available to the community under the Allen Institute's Terms of Use in hopes of facilitating discovery.

Learn about the API with these atlas and resource overviews:


Mouse Brain

Mouse Brain



Example Applications and Source Code


Atlas Drawings and Ontologies

Download colorized and labeled atlas images, histological images, SVG atlas graphics and the associated structure ontology.

Data Model

The data model includes entities from molecular biology, anatomic atlases, laboratory artifacts, experiments, and annotations.

Downloading 3-D Expression Grid Data

Download 3-D gene expression summaries re-sampled to a canonical reference space.

Downloading and Displaying SVG

The SVG download service returns annotations associated with the specified SectionImage as scalable vector graphics.

Downloading an Image

The image download services serves whole and partial two-dimensional images presented on the Allen Brain Atlas Web site.

Downloading an Ontology's Structure Graph

Download a hierarchical XML or JSON document containing each of the Structures in an Ontology.

Example Queries for Experiment Metadata

Commonly requested queries for experiment metadata.

Image-to-Image Synchronization

Image synchronization services use alignment results to find corresponding position between SectionDataSets, the 3-D reference model and structures.

Quantified Data by Structures

Gene expression and projection statistics.

RESTful Model Access (RMA)

RESTful service for searching and retrieving data from the Allen Institute.

Searching Annotated SectionDataSets

Search expert annotations of the Developing Mouse Brain Atlas' ISH data.

Searching a Specimen or Structure Tree

The Structure and Specimen Tree Search services return flat lists of ancestors and/or descendants for a specified structure or specimen.

For more detailed information, please refer to the Allen Brain Atlas Data Portal .

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