# PostgreSQL

**Canonical:** https://apis.io/providers/postgresql/  
**Website:** https://www.postgresql.org/  
**APIs profiled:** 1

PostgreSQL is a powerful, open-source object-relational database system with over 35 years of active development. It provides advanced SQL compliance, ACID transactions, and extensibility. PostgreSQL exposes a binary wire protocol via libpq and language bindings rather than a public HTTP REST API, so there is no canonical OpenAPI specification. HTTP access is typically layered on top via PostgREST, Hasura, or application code.

## Kin Score — 12.4 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 12.4).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 14.3 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (1)

- **PostgreSQL** — Open-source relational database with advanced SQL compliance and extensibility. Client libraries available in many languages.

## Security (1)

- **Postgresql Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Postgresql Plans Pricing**

## Tags

Database, Open-Source, Relational Database, SQL

---

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