drug-discovery-prompts/upstream/K-Dense-AI-scientific-agent-skills/skills/database-lookup/references/hca.md

title, task, lineage_type, upstream_source, upstream_sha, imported_at, prompt_class, upstream_changes, author, validated

title	task	lineage_type	upstream_source	upstream_sha	imported_at	prompt_class	upstream_changes	author	validated
Human Cell Atlas (HCA)		import	https://github.com/K-Dense-AI/scientific-agent-skills/blob/9c9bd2e9/skills/database-lookup/references/hca.md	9c9bd2e9	2026-06-26	prompt	accepted	upstream	false

Human Cell Atlas (HCA)

Base URL

https://service.azul.data.humancellatlas.org/

Auth

No auth required.

Key Endpoints

Endpoint	Description
/index/projects?size={n}&catalog=dcp2	List/search projects
/index/samples?size={n}&catalog=dcp2	List/search samples
/index/files?size={n}&catalog=dcp2	List/search files
/index/summary?catalog=dcp2	Summary statistics

Example Calls

# List projects
https://service.azul.data.humancellatlas.org/index/projects?size=5&catalog=dcp2

# Summary stats
https://service.azul.data.humancellatlas.org/index/summary?catalog=dcp2

Supports JSON filter parameters for organ, species, library construction, etc.

Response Format

JSON. hits array with project/sample/file metadata + pagination.

Rate Limits

No published limits. Be reasonable.