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Freestyle

Freestyle is the infrastructure for code you didn't write — VMs and Git for AI agents. The platform provides Linux microVMs that boot in under 600ms with live-fork, pause-resume, and persistent snapshots; a multi-tenant Git service with branchable filesystems, GitHub Sync, full-text search, and webhook triggers; an Execute (Serverless Runs) API for ephemeral JavaScript/TypeScript code; a Web Deployments API for hosted Node.js apps and static sites; Cron schedules; custom Domains with wildcard SSL; an Identity service for scoped per-user and per-agent access tokens; and Observability logs. Freestyle is a direct sandbox option for AI app builders, background agents, code review bots, and long-running assistants — a usage-priced alternative to running Anthropic's hosted Code Execution tool or building bespoke microVM infrastructure on Firecracker, Modal, or E2B.

agent ready

Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.

Kin Score

API Evangelist profiles Freestyle the way a machine reads it — 76 machine-readable artifacts across 11 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Freestyle scores 65.5/100 (strong), with a separate agent-readiness read of 55/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 65.5/100 · strong
Contract Quality 18.4 / 25
Developer Ergonomics 11.3 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 6.8 / 13
Governance 8.8 / 12
Discoverability 8.0 / 10
Agent readiness — 55/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile Freestyle

Each block below is one kind of artifact we hold for Freestyle. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 11

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

Freestyle Auth API

The Auth API from Freestyle — 2 operation(s) for auth.

Freestyle Certs API

APIs for managing SSL certificates.

Freestyle Cron API

The Cron API from Freestyle — 5 operation(s) for cron.

Freestyle DNS API

APIs for managing DNS records.

Freestyle Domains API

APIs for managing domains. This is only relevant when you want to start to deploy to custom domains. Please read [this guide](https://github.com/freestyle-sh/sandbox_sdks/blob/m...

Freestyle Execute API

APIs for running code. Send the code using the [execute](#tag/execute/POST/execute/v1/execute) endpoint, and you'll get the output back. Works with any TypeScript or JavaScript ...

Freestyle Git API

APIs for managing git repositories and accessing git objects like commits, trees, blobs, tags, and refs.

Freestyle Identity API

APIs for managing identities and access tokens.

Freestyle Observability API

APIs for observability.

Freestyle VM API

APIs for managing lightweight virtual machines (VMs) to run your code in isolated environments.

Freestyle Web API

APIs for deploying websites. We handle node modules caching, scaling, certificates and the whole end to end process. Send the code using the [deploy](#tag/web/POST/web/v1/deploy...

Scroll within the panel for all 11 ·

Open Collections 8

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Freestyle Cron API

OPEN COLLECTION

Freestyle Domains API

OPEN COLLECTION

Freestyle Execute API

OPEN COLLECTION

Freestyle Git API

OPEN COLLECTION

Freestyle Identity API

OPEN COLLECTION

Freestyle VMs API

OPEN COLLECTION

Scroll within the panel for all 8 ·

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Freestyle Sh Rate Limits

4 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

Cost, billing, and metering signals for API financial operations.

Features 21

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

Linux microVMs that boot in under 600ms with restored memory snapshots
Live VM forking — clone a running VM into multiple copies in milliseconds
Pause and resume — hibernate idle VMs and pay nothing while paused
Snapshots (memory + disk) with persistent snapshot retention on Hobby+
Multi-tenant Git hosting with branchable filesystems for AI agents
GitHub bidirectional sync (pull, push, or both) per repository
Full-text search across files, commit messages, and diffs
Webhook triggers on commits and refs
Per-repo and per-VM identity permissions with scoped access tokens
Custom domains with verification, wildcard SSL, DNS record management, and deployment mappings
Serverless Runs (execute) for ephemeral JS/TS code execution
Serverless Deployments for hosted Node.js apps and static sites
Cron schedules with execution history and metrics timeline
Observability logs across VMs, deployments, runs, and identities
First-class language integrations — Node.js, Bun, Deno, Python, uv, Ruby, Java, PostgreSQL, OpenCode, Web Terminal
TypeScript and Python SDKs plus Vercel AI, LangGraph, and Mastra SDK adapters
rigkit CLI for local dev machines
SSH access to VMs
Bearer-token auth (Authorization header) for all REST APIs
Pricing per vCPU-hour, GiB-memory-hour, and GiB-storage-hour with daily free allowances
Plan tiers Free, Hobby ($50/mo + usage), Pro ($500/mo + usage), Enterprise

Scroll within the panel for all 21 ·

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Freestyle Sh Context

0 classes · 13 properties

JSON-LD

Spectral Rules 1

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Freestyle API Rules

6 rules · 4 warnings

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

Standalone JSON Schema definitions for this provider's data models.

Freestyle Repository

0 properties

JSON SCHEMA

Freestyle VM

0 properties

JSON SCHEMA

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Freestyle Sh Authentication

http · 1 scheme

SECURITY

Freestyle Sh Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Freestyle Sh Agentic Access

128 operations · 62 acting · 6 human-in-the-loop

128 operations · 62 acting

AGENTIC

Use Cases 10

What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.

What developers build with this provider.

AI app builders (Lovable, Bolt, V0 style) provisioning a sandbox VM per project with cloned source, dev servers, and *.style.dev preview domains
Background agents (Devin, Cursor Agent style) forking a base VM into parallel workers — one builds the API, one builds the UI, one writes tests
Code review bots (CodeRabbit, Greptile style) cloning a repo at a PR SHA, running lint/test, and posting a Claude-generated review
Long-running AI assistants (Claude, OpenClaw, Cowork style) using a persistent VM with 60s idle pause to keep per-user state at $0 cost between turns
LLM code-interpreter style — execute model-generated code safely in an isolated microVM with egress control
Sandboxed AI agent evals on ephemeral microVMs (one VM per eval run)
Multi-tenant SaaS where each end user gets their own Freestyle Git repo and isolated VM
Reinforcement learning on microVMs — fan out, train, fold in
Deep-research agents that spawn, suspend on idle, and resume on event
Hosted code playgrounds for educational and developer-tool products

Scroll within the panel for all 10 ·

Integrations 12

Pre-built integrations with other platforms tell you where this provider already fits in a stack.

Pre-built integrations with other platforms and tools.

Anthropic Claude — Code Execution tool, Managed Agents, Skills (Freestyle sandbox positioned as an alternative or complement to Anthropic's hosted code execution sandbox)
GitHub — bidirectional repo sync, GitHub Sync configuration per repo
Vercel AI SDK — first-party adapter in sandbox_sdks
LangGraph — first-party adapter in sandbox_sdks
Mastra — first-party adapter in sandbox_sdks
Node.js, Bun, Deno — first-class VM runtimes
Python (with uv), Ruby, Java — first-class VM runtimes
PostgreSQL — managed inside VMs
OpenCode — VM integration
Cloudstate — Freestyle's own JavaScript database runtime
Adorable — Freestyle's own open-source Lovable-style AI app builder
Astro, Next.js, SvelteKit, Solid Start, React Native, Expo, Vite — starter templates

Scroll within the panel for all 12 ·

Solutions 4

Packaged solutions the provider offers on top of the raw API surface.

Packaged solutions this provider offers.

VMs and Git for AI Agents — give agents real Linux VMs with a Git-backed branchable filesystem, replacing per-step container snapshots with full-machine VM snapshots
Multi-tenant App Hosting — every end user or AI project gets its own VM, repo, and custom domain
AI Code Sandboxing — safer alternative to running LLM-generated code in your own process, with egress control and microVM isolation
Background Agent Infrastructure — persistent VMs that pause when idle and resume on event for long-running agentic workloads

Resources

Every other property we hold for Freestyle — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 3

Portal, sign-up, and the first successful call

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Access & Security 2

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 4

Pricing, plans, and the legal terms of use

Company 1

The organization behind the API

Other 1

Properties that don't map to a standard resource type

← All providers · Data indexed from github.com/api-evangelist/freestyle-sh · machine-readable index on apis.io