# Spin

**Canonical:** https://apis.io/providers/spin/  
**Website:** https://spinframework.dev/  
**APIs profiled:** 5

Spin is an open source framework by Fermyon for building and running fast, secure, and composable cloud microservices with WebAssembly. Spin provides a developer experience for creating event-driven serverless applications that compile to WebAssembly and run on any platform that supports the Spin runtime including local dev environments, Kubernetes (via SpinKube), and Fermyon Cloud.

## Kin Score — 22.1 / 100 (emerging)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 22.1).

| Facet | Score |
|---|---|
| Discoverability | 55.6 |
| Contract Quality | 10.7 |
| Governance | 28.8 |
| Contract Governance | 28.8 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 15.5 |
| 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 (5)

- **Spin HTTP Trigger API** — The Spin HTTP Trigger API handles incoming HTTP requests and routes them to the appropriate Spin component. Components receive an HTTP request object and return an HTTP response...
- **Spin Key-Value Store API** — The Spin Key-Value Store API provides Spin components with access to a persistent key-value storage service. Components read, write, and delete key-value pairs using the Spin SD...
- **Spin SQLite API** — The Spin SQLite API provides Spin components with access to an embedded relational database. Components can execute SQL queries and statements using the Spin SDK's SQLite interf...
- **Spin Serverless AI API** — The Spin Serverless AI API enables Spin components to run AI inference using built-in language model support (Llama 2, CodeLlama, etc.) via the Spin SDK's infer() function. Comp...
- **Spin Variables API** — The Spin Variables API provides runtime access to application configuration variables defined in spin.toml. Variables can be required or optional with defaults, and can be marke...

## Security (1)

- **Spin Domain Security** — TLSv1.3 · DNSSEC

## Plans (1)

- **Spin Plans Pricing**

## Tags

Cloud-Native, Microservices, Serverless, WebAssembly

---

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