# Cancer.gov

**Canonical:** https://apis.io/providers/cancer-gov/  
**Website:** https://www.cancer.gov/  
**APIs profiled:** 10

Cancer.gov is the web presence of the National Cancer Institute (NCI), the U.S. federal government's principal agency for cancer research and training. NCI and its partner programs expose a rich set of open APIs covering cancer clinical trials, genomic data, cancer-incidence surveillance, research data and models, terminology and vocabularies, and PDQ content — giving researchers, advocacy groups, clinicians, and application developers programmatic access to authoritative cancer data and content.

## Kin Score — 31.3 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 31.3).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 49.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 26.3 |
| Access Clarity | 26.3 |

Regulatory layer — **Government & Public Sector**: 29.6 (matched via tags).

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (10)

- **NCI Clinical Trials Search API** — RESTful API that lets developers build applications, search tools, and digital platforms over NCI-supported cancer clinical trials data sourced from NCI's Clinical Trials Report...
- **NCI Genomic Data Commons (GDC) API** — The external-facing REST interface for the NCI Genomic Data Commons. Drives the GDC Data Portal and GDC Submission Portal and is open for programmatic access. Provides query, do...
- **NCI SEER API** — RESTful API for the Surveillance, Epidemiology, and End Results (SEER) Program. Supports SEER datasets plus staging APIs for cancer staging (TNM and Collaborative Stage algorith...
- **NCI MoDaC API** — The NCI Model and Data Clearinghouse (MoDaC) API provides programmatic access to cancer research data, computational models, and associated tools hosted in MoDaC. Developers can...
- **NCI EVS Terminology API** — Enterprise Vocabulary Services (EVS) exposes NCI Thesaurus and NCI Metathesaurus content — over 192,000 concepts, 154,000 textual definitions, 623,000 synonyms and 630,000 inter...
- **NCI Content Syndication Services** — A suite of syndicated content channels — RSS feeds, the NCI Dictionary Widget, and syndicated publication content — that partner sites and health platforms can embed to deliver ...
- **Cancer.gov Diseases API** — The Diseases API from Cancer.gov — 1 operation(s) for diseases.
- **Cancer.gov Interventions API** — The Interventions API from Cancer.gov — 1 operation(s) for interventions.
- **Cancer.gov Terms API** — The Terms API from Cancer.gov — 1 operation(s) for terms.
- **Cancer.gov Trials API** — The Trials API from Cancer.gov — 2 operation(s) for trials.

## Agentic access (1)

- **Cancer Gov Agentic Access** — 6 operations · 1 acting

## Security (2)

- **Cancer Gov Authentication** — apiKey · 1 scheme
- **Cancer Gov Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Cancer Gov Plans Pricing**

## Tags

Cancer, Federal-Government, Healthcare, Research, Clinical Trials, Genomics, Surveillance, Open Data

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/cancer-gov/). Scores are computed from the provider's own public artifacts under a published rubric.