# API-Fiddle

**Canonical:** https://apis.io/providers/api-fiddle/  
**Website:** https://api-fiddle.com/  
**APIs profiled:** 5

API-Fiddle is an interactive, collaborative API design platform for creating professional APIs based on OpenAPI. It provides first-class support for OpenAPI 3.x, data transfer objects, API versioning, suggested response codes, parameter serialization, pagination patterns, and response structuring best practices. API-Fiddle enables seamless sharing of API definitions with teams without requiring user accounts, making it accessible for collaboration throughout the API design lifecycle.

## Kin Score — 32.7 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 32.7).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 72.0 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 7.9 |
| Developer Ergonomics | 14.3 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 29.1 (agent-aware)

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

## APIs (5)

- **API-Fiddle Export API** — Export projects and specifications.
- **API-Fiddle Projects API** — Manage API design projects.
- **API-Fiddle Sharing API** — Share projects with other users.
- **API-Fiddle Specifications API** — Manage API specifications within projects.
- **API-Fiddle Workspaces API** — Organize projects into workspaces.

## Agentic access (1)

- **Api Fiddle Agentic Access** — 19 operations · 12 acting

## Security (2)

- **Api Fiddle Authentication** — http · 1 scheme
- **Api Fiddle Domain Security** — TLSv1.3

## Plans (1)

- **Api Fiddle Plans Pricing**

## Use cases (3)

- **API Design and Prototyping** — Design and prototype REST APIs using OpenAPI before implementation, enabling API-first development workflows.
- **Team Collaboration on API Specs** — Collaborate with distributed teams on OpenAPI specifications without requiring accounts, reducing friction in the review process.
- **API Documentation** — Generate and publish professional API documentation from OpenAPI specifications with integrated tooling.

## Tags

API Design, OpenAPI, Collaboration, Documentation, Platform

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