# Zally

**Canonical:** https://apis.io/providers/zally/  
**Website:** https://opensource.zalando.com/zally/  
**APIs profiled:** 3

Zally is an open source API linter from Zalando that validates OpenAPI 2 and 3 specifications against configurable rule sets for API design consistency. It exposes a REST API, command-line interface, and web UI for checking API designs against Zalando's RESTful API Guidelines or custom rule sets.

## Kin Score — 42.1 / 100 (developing)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 42.1).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 68.0 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 40.5 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 30.6 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| 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 · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (3)

- **Zally Api Violations API** — The Api Violations API from Zally — 2 operation(s) for api violations.
- **Zally Review Statistics API** — The Review Statistics API from Zally — 1 operation(s) for review statistics.
- **Zally Supported Rules API** — The Supported Rules API from Zally — 1 operation(s) for supported rules.

## Agentic access (1)

- **Zally Agentic Access** — 4 operations · 1 acting

## Security (2)

- **Zally Authentication** — http · 1 scheme
- **Zally Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Zally Plans Pricing**

## Use cases (4)

- **API Design Review** — Review OpenAPI specs in pull requests to enforce design standards before merge.
- **API Governance** — Enforce organizational API guidelines across teams via shared rule sets.
- **API Quality Gate** — Block API releases that violate critical MUST rules in CI/CD pipelines.
- **Style Guide Enforcement** — Encode an API style guide as executable rules and apply consistently.

## Tags

API Design, API Linting, API Quality, Open-Source, OpenAPI, Zalando

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