# National Library of Medicine

**Canonical:** https://apis.io/providers/national-library-of-medicine/  
**Website:** https://www.nlm.nih.gov/  
**APIs profiled:** 4

The National Library of Medicine, part of the National Institutes of Health, is the world's largest biomedical library. It collects, organizes, and provides access to medical literature and information to support research and decision-making in healthcare, including PubMed and ClinicalTrials.gov.

## Kin Score — 23.6 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 23.6).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 49.7 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

Regulatory layer — **Health**: 7.5 (matched via tags).

## Agent readiness — 20.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| 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 — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (4)

- **National Library of Medicine Discovery API** — Discover database metadata, related records, and citations.
- **National Library of Medicine History API** — Manage server-side history sets via the Entrez History server.
- **National Library of Medicine Retrieve API** — Retrieve full or summary records from Entrez databases.
- **National Library of Medicine Search API** — Search Entrez databases for matching records.

## Agentic access (1)

- **National Library Of Medicine Agentic Access** — 9 operations · 1 acting

## Security (1)

- **National Library Of Medicine Domain Security** — TLSv1.3 · HSTS · DNSSEC

## Plans (1)

- **National Library Of Medicine Plans Pricing**

## Tags

Federal-Government, Health, Library, Medicine

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