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.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles Smol Machines the way a machine reads it — 42 machine-readable artifacts across 2 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 — Smol Machines scores 46.0/100 (developing), with a separate agent-readiness read of 24/100 (agent aware). 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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
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How we profile Smol Machines
Each block below is one kind of artifact we hold for Smol Machines. 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 19
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.
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 within the panel for all 19 ·
Open Collections 20
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).
API Collection
OPEN COLLECTIONsmolfleet apikeys API
OPEN COLLECTIONsmolfleet apikeys apps API
OPEN COLLECTIONsmolfleet apikeys billing API
OPEN COLLECTIONsmolfleet apikeys Containers API
OPEN COLLECTIONsmolfleet apikeys Execution API
OPEN COLLECTIONsmolfleet apikeys health API
OPEN COLLECTIONsmolfleet apikeys Images API
OPEN COLLECTIONsmolfleet apikeys Logs API
OPEN COLLECTIONsmolfleet apikeys machines API
OPEN COLLECTIONsmolfleet apikeys MicroVMs API
OPEN COLLECTIONsmolfleet apikeys nodes API
OPEN COLLECTIONsmolfleet apikeys operations API
OPEN COLLECTIONsmolfleet apikeys plans API
OPEN COLLECTIONsmolfleet apikeys pools API
OPEN COLLECTIONsmolfleet apikeys Sandboxes API
OPEN COLLECTIONsmolfleet apikeys tenants API
OPEN COLLECTIONsmolfleet apikeys tokens API
OPEN COLLECTIONsmolfleet apikeys usage API
OPEN COLLECTIONsmolfleet apikeys volumes API
OPEN COLLECTIONScroll within the panel for all 20 ·
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.
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.
Resources
Every other property we hold for Smol Machines — 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 5
Portal, sign-up, and the first successful call
Documentation 4
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
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/smol-machines · machine-readable index on apis.io
This is an independent, third-party profile of Smol Machines, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.