# API Stack

**Canonical:** https://apis.io/providers/api-stack/  
**Website:** https://www.apistack.io/  
**APIs profiled:** 1

API Stack is a free directory and discovery platform powered by Apideck that catalogs 213+ third-party API tools and services across 50+ categories including API gateways, management, design, authentication, developer portals, specifications, testing, security, monitoring, and marketplaces, helping developers discover and evaluate the right API tooling for their needs.

## Kin Score — 12.4 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 12.4).

| Facet | Score |
|---|---|
| Discoverability | 59.3 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 3.0 (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 |

## Access

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

## APIs (1)

- **API Stack Directory** — The API Stack Directory is a searchable catalog of 213+ API tools and services organized into 50+ categories. Each listing includes descriptions, features, pricing, screenshots,...

## Security (1)

- **Api Stack Domain Security** — TLSv1.3 · HSTS

## Plans (1)

- **Api Stack Plans Pricing**

## Use cases (5)

- **API Tooling Discovery** — Developers and architects find and evaluate API tools across all stages of the API lifecycle.
- **API Gateway Selection** — Compare API gateway options from open source to enterprise to find the right solution for infrastructure needs.
- **API Security Tool Research** — Discover API security testing, authentication, and monitoring tools for securing API programs.
- **API Design Tool Evaluation** — Explore API design tools, editors, and specification validators to improve API development workflows.
- **Developer Portal Platforms** — Research developer portal platforms and documentation tools for publishing API programs.

## Tags

API Design, API Directory, API Gateways, API Management, API Monitoring, API Security, API Testing, API Tools, Apideck, Developer Tools, Directory, Discovery

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