Smol Machines

Smol Machines (smol machines, inc.) is a Y Combinator-backed developer infrastructure company building portable, self-contained Linux microVMs. Its open-source `smolvm` engine and `smol` CLI (both Rust, Apache-2.0) boot hardware-isolated virtual machines from any OCI image in under 200ms — on a laptop, in the smolfleet cloud, or self-hosted — with no daemon and no Docker. The same Machine API runs locally as an in-process microVM or against the hosted smolfleet control plane at api.smolmachines.com, so teams sandbox untrusted code and AI-agent workloads, ship stateful `.smolmachine` artifacts, and deploy machines across a cluster without changing a line. Node and Python SDKs (`smolmachines`), a local REST API, and a cloud REST API are all public.

Smol Machines publishes 19 APIs on the APIs.io network, including apikeys API, apps API, billing API, and 16 more. Tagged areas include Company, MicroVM, Sandbox, Virtualization, and Developer Tools.

Smol Machines’ developer surface includes authentication, documentation, API reference, getting-started guide, quickstart, signup flow, pricing, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub
49.9/100 developing ▬ flat Agent 69/100 agent native Full breakdown ↓
scored 2026-07-23 · rubric v0.5
AccessSelf serve
19 APIs 1 MCP Servers
CompanyMicroVMSandboxVirtualizationDeveloper ToolsInfrastructureAI AgentsCode ExecutionContainersCloud

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-23 · rubric v0.5
Composite quality — 49.9/100 · developing
Contract Quality 10.1 / 25
Developer Ergonomics 16.1 / 20
Commercial Clarity 8.9 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 69/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/smol-machines: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 19

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

Smol Machines apikeys API

API key management

Smol Machines apps API

Long-running app deployments

Smol Machines billing API

Self-service account and metering

Smol Machines Containers API

Container management within sandboxes

Smol Machines Execution API

Command execution in sandboxes

Smol Machines health API

Health, probes, and metrics

Smol Machines Images API

OCI image management

Smol Machines Logs API

Log streaming

Smol Machines machines API

First-class machine lifecycle and exec

Smol Machines MicroVMs API

Persistent microVM management

Smol Machines nodes API

Cluster node enrollment and status

Smol Machines operations API

Async operations

Smol Machines plans API

Quota + rate + budget plans

Smol Machines pools API

Warm machine pools

Smol Machines Sandboxes API

Sandbox lifecycle management

Smol Machines tenants API

Customer accounts (product-backend)

Smol Machines tokens API

Node join tokens

Smol Machines usage API

Usage and billing

Smol Machines volumes API

Persistent volumes

Scroll for all 19

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

smol-machines-mcp.yml

MCP SERVER

Security Posture 2

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

Smol Machines Authentication

http/oauth2 · 3 schemes

SECURITY

Smol Machines Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Smol Machines Agentic Access

83 operations · 49 acting · 5 human-in-the-loop

83 operations · 49 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 Quickstart
Quickstart
 SignUp
SignUp
 Registry
Registry

Documentation 4

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference
 OpenAPI
OpenAPI
 OpenAPI
OpenAPI

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 WellKnown
WellKnown
 AgentSkill
AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conventions
Conventions
 DataModel
DataModel

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 CLI
CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 3

Status, limits, changes, and where to get help

StatusPage
StatusPage
 Support
Support
 ChangeLog
ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 1

The organization behind the API

Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: smol-machines
name: Smol Machines
description: Smol Machines (smol machines, inc.) is a Y Combinator-backed developer infrastructure company building portable,
  self-contained Linux microVMs. Its open-source `smolvm` engine and `smol` CLI (both Rust, Apache-2.0) boot hardware-isolated
  virtual machines from any OCI image in under 200ms — on a laptop, in the smolfleet cloud, or self-hosted — with no daemon
  and no Docker. The same Machine API runs locally as an in-process microVM or against the hosted smolfleet control plane
  at api.smolmachines.com, so teams sandbox untrusted code and AI-agent workloads, ship stateful `.smolmachine` artifacts,
  and deploy machines across a cluster without changing a line. Node and Python SDKs (`smolmachines`), a local REST API, and
  a cloud REST API are all public.
url: https://raw.githubusercontent.com/api-evangelist/smol-machines/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
image: https://smolmachines.com/install.sh
tags:
- Company
- MicroVM
- Sandbox
- Virtualization
- Developer Tools
- Infrastructure
- AI Agents
- Code Execution
- Containers
- Cloud
apis:
- aid: smol-machines:smol-machines-apikeys-api
  name: Smol Machines apikeys API
  description: API key management
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - apikeys
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-apikeys-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-apps-api
  name: Smol Machines apps API
  description: Long-running app deployments
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - apps
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-apps-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-billing-api
  name: Smol Machines billing API
  description: Self-service account and metering
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - billing
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-billing-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-containers-api
  name: Smol Machines Containers API
  description: Container management within sandboxes
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - Containers
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-containers-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-execution-api
  name: Smol Machines Execution API
  description: Command execution in sandboxes
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - Execution
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-execution-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-health-api
  name: Smol Machines health API
  description: Health, probes, and metrics
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - health
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-health-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-images-api
  name: Smol Machines Images API
  description: OCI image management
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - Images
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-images-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-logs-api
  name: Smol Machines Logs API
  description: Log streaming
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - Logs
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-logs-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-machines-api
  name: Smol Machines machines API
  description: First-class machine lifecycle and exec
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - machines
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-machines-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-microvms-api
  name: Smol Machines MicroVMs API
  description: Persistent microVM management
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - MicroVMs
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-microvms-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-nodes-api
  name: Smol Machines nodes API
  description: Cluster node enrollment and status
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - nodes
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-nodes-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-operations-api
  name: Smol Machines operations API
  description: Async operations
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - operations
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-operations-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-plans-api
  name: Smol Machines plans API
  description: Quota + rate + budget plans
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - plans
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-plans-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-pools-api
  name: Smol Machines pools API
  description: Warm machine pools
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - pools
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-pools-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-sandboxes-api
  name: Smol Machines Sandboxes API
  description: Sandbox lifecycle management
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - Sandboxes
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-sandboxes-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-tenants-api
  name: Smol Machines tenants API
  description: Customer accounts (product-backend)
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - tenants
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-tenants-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-tokens-api
  name: Smol Machines tokens API
  description: Node join tokens
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - tokens
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-tokens-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-usage-api
  name: Smol Machines usage API
  description: Usage and billing
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - usage
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-usage-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
- aid: smol-machines:smol-machines-volumes-api
  name: Smol Machines volumes API
  description: Persistent volumes
  humanURL: https://smolmachines.com/docs/cloud-api
  baseURL: https://api.smolmachines.com
  tags:
  - volumes
  properties:
  - type: OpenAPI
    url: openapi/smol-machines-volumes-api-openapi.yml
  - type: Documentation
    url: https://smolmachines.com/docs/cloud-api
common:
- type: Authentication
  url: authentication/smol-machines-authentication.yml
- type: DomainSecurity
  url: security/smol-machines-domain-security.yml
- type: AgenticAccess
  url: agentic-access/smol-machines-agentic-access.yml
- type: DeveloperPortal
  url: https://smolmachines.com/docs
- type: Documentation
  url: https://smolmachines.com/docs
- type: APIReference
  url: https://smolmachines.com/docs/cloud-api
- type: GettingStarted
  url: https://smolmachines.com/docs/quickstart
- type: Quickstart
  url: https://smolmachines.com/docs/cloud-quickstart
- type: SignUp
  url: https://smolmachines.com/console
- type: Pricing
  url: https://smolmachines.com/pricing
- type: TermsOfService
  url: https://smolmachines.com/legal/terms
- type: PrivacyPolicy
  url: https://smolmachines.com/legal/privacy
- type: Blog
  url: https://smolmachines.com/engineering
- type: StatusPage
  url: https://smolmachines.com/status
- type: GitHubOrganization
  url: https://github.com/smol-machines
- type: Support
  url: https://discord.gg/E5r8rEWY9J
- type: Registry
  url: https://smolmachines.com/registry
- type: OpenAPI
  url: openapi/smol-machines-smolfleet-openapi.json
- type: OpenAPI
  url: openapi/smol-machines-smolvm-openapi.json
- type: LLMsTxt
  url: llms/smol-machines-llms.txt
- type: Packages
  url: packages/smol-machines-packages.yml
- type: SDKs
  url: packages/smol-machines-packages.yml
- type: CLI
  url: cli/smol-machines-cli.yml
- type: MCPServer
  url: mcp/smol-machines-mcp.yml
- type: WellKnown
  url: well-known/smol-machines-well-known.yml
- type: Conformance
  url: conformance/smol-machines-conformance.yml
- type: ErrorCatalog
  url: errors/smol-machines-problem-types.yml
- type: Lifecycle
  url: lifecycle/smol-machines-lifecycle.yml
- type: Conventions
  url: conventions/smol-machines-conventions.yml
- type: ChangeLog
  url: changelog/smol-machines-changelog.yml
- type: DataModel
  url: data-model/smol-machines-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 23
  pass: local-v1