49 lines
1.2 KiB
Markdown
49 lines
1.2 KiB
Markdown
---
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title: "Human Cell Atlas (HCA)"
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task: ""
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lineage_type: import
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upstream_source: https://github.com/K-Dense-AI/scientific-agent-skills/blob/9c9bd2e9/skills/database-lookup/references/hca.md
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upstream_sha: 9c9bd2e9
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imported_at: 2026-06-26
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prompt_class: prompt
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upstream_changes: accepted
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author: upstream
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validated: false
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---
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# Human Cell Atlas (HCA)
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## Base URL
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```
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https://service.azul.data.humancellatlas.org/
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```
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## Auth
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No auth required.
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## Key Endpoints
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| Endpoint | Description |
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|----------|-------------|
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| `/index/projects?size={n}&catalog=dcp2` | List/search projects |
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| `/index/samples?size={n}&catalog=dcp2` | List/search samples |
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| `/index/files?size={n}&catalog=dcp2` | List/search files |
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| `/index/summary?catalog=dcp2` | Summary statistics |
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## Example Calls
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```
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# List projects
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https://service.azul.data.humancellatlas.org/index/projects?size=5&catalog=dcp2
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# Summary stats
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https://service.azul.data.humancellatlas.org/index/summary?catalog=dcp2
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```
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Supports JSON filter parameters for organ, species, library construction, etc.
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## Response Format
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JSON. `hits` array with project/sample/file metadata + pagination.
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## Rate Limits
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No published limits. Be reasonable.
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