# RCSB PDB

**Canonical:** https://apis.io/providers/pdb/  
**Website:** https://www.rcsb.org  
**APIs profiled:** 7

RCSB Protein Data Bank (RCSB PDB) is a scientific data resource providing free, open access to the 3D structural data of biological macromolecules including proteins, nucleic acids, and complex assemblies. It serves researchers worldwide through a suite of programmatic APIs covering data retrieval, full-text and attribute search, sequence and structure similarity search, molecular model data access, volumetric electron density maps, sequence coordinate alignments, and structure alignment calculations.

## Kin Score — 33.5 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 33.5).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 43.5 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 52.6 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 28.9 |
| Access Clarity | 28.9 |

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

## Agent readiness — 30.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| 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

Free — onboarding: unknown, pricing: free, trial: no (confidence: medium).

## APIs (7)

- **RCSB PDB Data API** — Provides structured access to the complete RCSB PDB holdings via REST and GraphQL interfaces. Given a known PDB identifier, callers can retrieve rich JSON metadata about entries...
- **RCSB PDB Sequence Coordinates API** — GraphQL service providing sequence-level alignments between structural databases and external sequence resources. Exposes two core queries — alignment and annotations — enabling...
- **RCSB PDB Structure Alignment API** — Asynchronous REST API that performs programmatic structure alignment calculations between PDB entries or user-supplied coordinate files. Callers submit an alignment job via POST...
- **RCSB PDB General API** — The General API from RCSB PDB — 12 operation(s) for general.
- **RCSB PDB Metadata Service API** — The Metadata Service API from RCSB PDB — 3 operation(s) for metadata service.
- **RCSB PDB Search Service API** — The Search Service API from RCSB PDB — 2 operation(s) for search service.
- **RCSB PDB Suggest Service API** — The Suggest Service API from RCSB PDB — 1 operation(s) for suggest service.

## Agentic access (1)

- **Pdb Agentic Access** — 28 operations · 10 acting

## Security (1)

- **Pdb Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Pdb Plans Pricing**

## Tags

Structural Biology, Proteomics, Bioinformatics, Genomics, Life Sciences, Open Data, Research, Macromolecules, Crystallography, NMR

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