For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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This endpoint is not available in Label Studio Community Edition. [Learn more about Label Studio Enterprise](https://humansignal.com/goenterprise)
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Retrieve a list of all projects in a specific workspace.
Authentication
AuthorizationToken
The token (or API key) must be passed as a request header. You can find your user token on the User Account page in Label Studio. Example: <br><pre><code class="language-bash">curl https://label-studio-host/api/projects -H "Authorization: Token [your-token]"</code></pre>
Start model training after any annotations are submitted or updated
statestringRead-only
task_numberintegerRead-only
Total task number in project
total_annotations_numberintegerRead-only
Total annotations number in project including skipped_annotations_number and ground_truth_number.
total_predictions_numberintegerRead-only
Total predictions number in project including skipped_annotations_number, ground_truth_number, and useful_annotation_number.
useful_annotation_numberintegerRead-only
Useful annotation number in project not including skipped_annotations_number and ground_truth_number. Total annotations = annotation_number + skipped_annotations_number + ground_truth_number
annotator_evaluation_enabledbooleanOptional
Enable annotator evaluation for the project
colorstring or nullOptional<=16 characters
control_weightsmap from strings to objects or nullOptional
Dict of weights for each control tag in metric calculation. Keys are control tag names from the labeling config. At least one tag must have a non-zero overall weight.
created_byobjectOptional
Project owner
descriptionstring or nullOptional
Project description
enable_empty_annotationbooleanOptional
Allow annotators to submit empty annotations
evaluate_predictions_automaticallybooleanOptional
Retrieve and display predictions when loading a task
expert_instructionstring or nullOptional
Labeling instructions in HTML format
is_draftbooleanOptional
Whether or not the project is in the middle of being created
is_publishedbooleanOptional
Whether or not the project is published to annotators
label_configstring or nullOptional
Label config in XML format. See more about it in documentation
Maximum number of annotations for one task. If the number of annotations per task is equal or greater to this value, the task is completed (is_labeled=True)