# NCI Resources for Researchers API

**Canonical:** https://apis.io/apis/cancer-gov/r4r-api/  
**Provider:** Cancer.gov — https://apis.io/providers/cancer-gov/  
**Base URL:** https://webapis.cancer.gov/r4r/v1  
**Documentation:** https://webapis.cancer.gov/r4r/v1/

NCI Resources for Researchers API is one of 15 APIs that [Cancer.gov](https://apis.io/providers/cancer-gov/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Research, Resources, and Directory. The published artifact set on APIs.io includes an OpenAPI specification.

Backs NCI's Resources for Researchers directory — searchable metadata about NCI tools, datasets, repositories and services available to the cancer research community. No credential required.

## Operations (2)

| Method | Path | Summary |
|---|---|---|
| GET | `/resource/{id}` | Gets a Resource by the identifier. |
| GET | `/resources` | Searches all resources |

## Machine-readable artifacts (3)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/cancer-gov/refs/heads/main/openapi/cancer-gov-r4r-openapi.yml
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/cancer-gov/refs/heads/main/overlays/cancer-gov-r4r-overlay.yaml
- **SourceCode** — https://github.com/NCIOCPL/r4r-api

## Other Cancer.gov APIs (12)

- [NCI Clinical Trials Search API](https://apis.io/apis/cancer-gov/clinical-trials-api/)
- [NCI Genomic Data Commons (GDC) API](https://apis.io/apis/cancer-gov/gdc-api/)
- [NCI SEER API](https://apis.io/apis/cancer-gov/seer-api/)
- [NCI MoDaC API](https://apis.io/apis/cancer-gov/modac-api/)
- [NCI EVS Terminology API](https://apis.io/apis/cancer-gov/evs-api/)
- [NCI Content Syndication Services](https://apis.io/apis/cancer-gov/syndication-services/)
- [Cancer.gov Diseases API](https://apis.io/apis/cancer-gov/cancer-gov-diseases-api/)
- [Cancer.gov Interventions API](https://apis.io/apis/cancer-gov/cancer-gov-interventions-api/)
- [Cancer.gov Terms API](https://apis.io/apis/cancer-gov/cancer-gov-terms-api/)
- [Cancer.gov Trials API](https://apis.io/apis/cancer-gov/cancer-gov-trials-api/)
- [NCI Glossary Term API](https://apis.io/apis/cancer-gov/glossary-api/)
- [NCI Drug Dictionary API](https://apis.io/apis/cancer-gov/drug-dictionary-api/)

## Tags

Research, Resources, Directory

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/cancer-gov/r4r-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/cancer-gov/.