Stack Machine

StackMachine is elastic, headless infrastructure for AI applications and agents. It runs existing Node.js, Python, and PHP codebases as WebAssembly with sub-5ms cold starts and sandboxed execution for untrusted or AI-generated code, packing thousands of apps per server. The platform is driven by a single GraphQL API (api.stackmachine.com/graphql) plus official JavaScript and Python SDKs, exposing app deployment, custom domains and DNS, managed databases and volumes, cron jobs, secrets, transactional email, cloud storage, package publishing, SSH access, and usage metering. Backed by a16z.

Stack Machine is listed with 1 API on the APIs.io network. Tagged areas include Company, Infrastructure, Serverless, WebAssembly, and Edge Compute.

Stack Machine’s developer surface includes documentation, API reference, getting-started guide, support, pricing, signup flow, authentication, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

39.2/100 thin ▬ flat Agent 20/100 agent aware Front door AI 5/6 prominent Heartbeat 56/100 slowing saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 4 Agent Skills

Company Infrastructure Serverless WebAssembly Edge Compute AI Applications GraphQL Platform-as-a-Service Deployment Hosting DNS Database

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 39.2/100 · thin

Contract Quality 8.4 / 21

Developer Ergonomics 12.0 / 17

Access Clarity 4.0 / 17

Operational Transparency 2.0 / 11

Contract Governance 0.5 / 10

Discoverability 6.2 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 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 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 23.7 — up to +15.3 composite points
Contract Quality scores 39.4 — up to +15.2 composite points
Contract Governance scores 4.5 — up to +11.5 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/stack-machine/apis.yml: open an issue on github.com/api-evangelist/stack-machine to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 2

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

DNS

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

GraphQL

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

StackMachine GraphQL API

Single GraphQL endpoint for deploying and managing StackMachine apps, custom domains and DNS, managed databases and volumes, cron jobs, secrets, transactional email, cloud stora...

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

Attach and verify a custom domain

AGENT SKILL

Deploy and publish an app

AGENT SKILL

Manage DNS records

AGENT SKILL

Manage app secrets and env vars

AGENT SKILL

Security Posture 2

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

Stack Machine Authentication

apiKey · 1 scheme

SECURITY

Stack Machine Domain Security

TLSv1.3

SECURITY

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

GraphQL

GraphQL

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Lifecycle

DataModel

Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

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

Website

Website

Source (apis.yml)

aid: stack-machine
name: Stack Machine
description: StackMachine is elastic, headless infrastructure for AI applications and agents. It runs existing Node.js, Python,
  and PHP codebases as WebAssembly with sub-5ms cold starts and sandboxed execution for untrusted or AI-generated code, packing
  thousands of apps per server. The platform is driven by a single GraphQL API (api.stackmachine.com/graphql) plus official
  JavaScript and Python SDKs, exposing app deployment, custom domains and DNS, managed databases and volumes, cron jobs, secrets,
  transactional email, cloud storage, package publishing, SSH access, and usage metering. Backed by a16z.
url: https://raw.githubusercontent.com/api-evangelist/stack-machine/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://www.stackmachine.com/opengraph-image.png
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Infrastructure
- Serverless
- WebAssembly
- Edge Compute
- AI Applications
- GraphQL
- Platform-as-a-Service
- Deployment
- Hosting
- DNS
- Database
tags_raw:
- Company
- Infrastructure
- Serverless
- WebAssembly
- Edge Compute
- AI Applications
- GraphQL
- Platform as a Service
- Deployment
- Hosting
- DNS
- Databases
apis:
- name: StackMachine GraphQL API
  description: Single GraphQL endpoint for deploying and managing StackMachine apps, custom domains and DNS, managed databases
    and volumes, cron jobs, secrets, transactional email, cloud storage, package publishing, SSH access, and usage metering.
    Relay-style schema (Node global IDs, cursor connections) with API-key authentication.
  humanURL: https://docs.stackmachine.com/
  baseURL: https://api.stackmachine.com/graphql
  tags:
  - GraphQL
  - Deployment
  - Infrastructure
  properties:
  - type: GraphQL
    url: graphql/stack-machine-schema.graphql
  - type: Documentation
    url: https://docs.stackmachine.com/
  - type: APIReference
    url: https://docs.stackmachine.com/
common:
- type: Website
  url: https://www.stackmachine.com/
- type: DomainSecurity
  url: security/stack-machine-domain-security.yml
- type: DeveloperPortal
  url: https://docs.stackmachine.com/
- type: Documentation
  url: https://docs.stackmachine.com/
- type: APIReference
  url: https://docs.stackmachine.com/
- type: GettingStarted
  url: https://docs.stackmachine.com/getting-started/installation
- type: GitHubOrganization
  url: https://github.com/stackmachine
- type: Support
  url: https://github.com/stackmachine/sdks/issues
- type: Pricing
  url: https://stackmachine.com/pricing
- type: SignUp
  url: https://dashboard.stackmachine.com/signup
- type: Login
  url: https://dashboard.stackmachine.com/signin
- type: TermsOfService
  url: https://stackmachine.com/terms
- type: PrivacyPolicy
  url: https://stackmachine.com/privacy
- type: GraphQL
  url: graphql/stack-machine-schema.graphql
- type: Packages
  url: packages/stack-machine-packages.yml
- type: SDKs
  url: packages/stack-machine-packages.yml
- type: Authentication
  url: authentication/stack-machine-authentication.yml
- type: Conventions
  url: conventions/stack-machine-conventions.yml
- type: Idempotency
  url: conventions/stack-machine-conventions.yml
- type: ErrorCatalog
  url: errors/stack-machine-error-codes.yml
- type: Lifecycle
  url: lifecycle/stack-machine-lifecycle.yml
- type: ChangeLog
  url: changelog/stack-machine-changelog.yml
- type: DataModel
  url: data-model/stack-machine-data-model.yml
- type: Conformance
  url: conformance/stack-machine-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/stack-machine-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/stack-machine-llms.txt
- type: Sandbox
  url: sandbox/stack-machine-sandbox.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 18
  pass: local-v1
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io

Stack Machine API — frequently asked questions

Does Stack Machine have an API?

Yes. APIs.io lists 1 API from Stack Machine, including StackMachine GraphQL API.

How do I authenticate with the Stack Machine API?

Stack Machine uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Stack Machine Authentication.

Is the Stack Machine API ready for AI agents?

Stack Machine has a Kin Score of 39.2 out of 100 (thin) and an Agent Readiness score of 20.3 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

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find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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