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Skillintermediate

Human Cell Atlas (HCA)

| 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 |

Claude Code Knowledge Pack7/10/2026

Overview

Human Cell Atlas (HCA)

Base URL

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

Auth

No auth required.

Key Endpoints

EndpointDescription
/index/projects?size={n}&catalog=dcp2List/search projects
/index/samples?size={n}&catalog=dcp2List/search samples
/index/files?size={n}&catalog=dcp2List/search files
/index/summary?catalog=dcp2Summary 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.