demo.st

demo.st is a "demo stage for vibe-coded prototypes": a hosting service that lets people who build prototypes with AI coding agents (Cursor, Bolt, Claude Desktop and similar) reserve a subdomain such as project-name.demo.st and publish a static site (a zip of HTML, CSS and JS, up to 10MB) without DevOps. It is MCP-native - agents connect to its MCP endpoint with a bearer token to reserve subdomains and upload sites - and it offers an optional document API at api.demo.st/v1 that a published static site can call with a per-site API key (dk_...).

demo.st is listed with 2 APIs on the APIs.io network. Tagged areas include Company, Hosting, Static Site Hosting, Prototyping, and MCP.

demo.st’s developer surface includes authentication, documentation, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

16.4/100 emerging Agent 9/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

2 APIs 1 MCP Servers

Company HostingStatic Site HostingPrototyping MCP AI Agents Developer Tools Document-Api

Kin Score

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

Composite quality — 16.4/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.6 / 11

Contract Governance 0.0 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.9 / 15

Agent readiness — 9/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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

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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

10 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 21.1 — up to +15.8 composite points
Developer Ergonomics scores 21.4 — up to +15.7 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/demo-st/apis.yml: open an issue on github.com/api-evangelist/demo-st 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 1

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

APIs 2

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

demo.st Document API

Optional JSON document store at api.demo.st - collections and records scoped to a site API key - that a static site published on demo.st can call from the browser. The homepage ...

demo.st MCP Server

Remote MCP server (streamable HTTP, POST) for AI coding agents to check subdomain availability, reserve and release subdomains, upload or clear a static site, manage the site AP...

MCP Servers 1

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

demo.st MCP Server

Official remote MCP server for demo.st. Tool list below is the verbatim result of a live tools/list call (JSON-RPC initialize + tools/list against the endpoint advertised at htt...

MCP SERVER

demo.st API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

Demo St Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Demo St Rate Limits

0 limits

RATE LIMITS

Security Posture 2

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

Demo St Authentication

http · 2 schemes

SECURITY

Demo St Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Lifecycle

Lifecycle

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: demo-st
name: demo.st
description: 'demo.st is a "demo stage for vibe-coded prototypes": a hosting service that lets people who build prototypes
  with AI coding agents (Cursor, Bolt, Claude Desktop and similar) reserve a subdomain such as project-name.demo.st and publish
  a static site (a zip of HTML, CSS and JS, up to 10MB) without DevOps. It is MCP-native - agents connect to its MCP endpoint
  with a bearer token to reserve subdomains and upload sites - and it offers an optional document API at api.demo.st/v1 that
  a published static site can call with a per-site API key (dk_...).'
url: https://artifacts.apis.io/demo-st/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-05 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: covered
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-05'
modified: '2026-11-05'
tags:
- Company
- Hosting
- Static Site Hosting
- Prototyping
- MCP
- AI Agents
- Developer Tools
- Document-Api
tags_raw:
- Company
- Hosting
- Static Site Hosting
- Prototyping
- MCP
- AI Agents
- Developer Tools
- Document API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://demo.st/favicon.svg
common:
- type: Conventions
  url: conventions/demo-st-conventions.yml
- type: Authentication
  url: authentication/demo-st-authentication.yml
- type: Lifecycle
  url: lifecycle/demo-st-lifecycle.yml
- type: MCPServer
  url: mcp/demo-st-mcp.yml
- type: Hosts
  url: hosts/demo-st-hosts.yml
- type: GitHubOrganization
  url: https://github.com/Reload
- type: DomainSecurity
  url: security/demo-st-domain-security.yml
- type: Website
  url: https://demo.st/
- type: Documentation
  url: https://demo.st/mcp
- type: TermsOfService
  url: https://demo.st/terms
- type: PrivacyPolicy
  url: https://demo.st/privacy
apis:
- aid: demo-st:document-api
  name: demo.st Document API
  description: 'Optional JSON document store at api.demo.st - collections and records scoped to a site API key - that a static
    site published on demo.st can call from the browser. The homepage says to embed the key for https://api.demo.st/v1 as
    Authorization: Bearer dk_... (it requires a reserved subdomain); the API root advertises /v1/:collection (Bearer dk_...
    or X-Demo-Key) and /health. demo.st publishes no OpenAPI or other machine-readable contract for it.'
  humanURL: https://demo.st/
  baseURL: https://api.demo.st/v1
  tags:
  - Document-Api
  - JSON Store
  tags_raw:
  - Document API
  - JSON Store
- aid: demo-st:mcp-server
  name: demo.st MCP Server
  description: Remote MCP server (streamable HTTP, POST) for AI coding agents to check subdomain availability, reserve and
    release subdomains, upload or clear a static site, manage the site API key, and manage document collections and records.
    Most tools require an Authorization Bearer token that a signed-in user gets from demo.st/api/mcp/token.
  humanURL: https://demo.st/mcp
  baseURL: https://demo.st/mcp
  tags:
  - MCP
  - AI Agents
x-coverage:
  state: covered
  reason: identity-verified
  detail: Name, description, tags and pointers read from the provider's own site (title "demo.st — Demo stage for vibe-coded
    prototypes"). GitHub links in pre-flight site_links came from GitHub's OAuth login page, not demo.st, and were not recorded.
  evidence:
  - url: https://demo.st/
    status: 200
  - url: https://demo.st/mcp
    status: 200
  - url: https://demo.st/terms
    status: 200
  - url: https://demo.st/privacy
    status: 200
  - url: https://demo.st/favicon.svg
    status: 200
  - url: https://api.demo.st/
    status: 200
x-enrichment:
  date: '2026-11-05'
  status: enriched
  artifacts_added: 15
  pass: modular-v1
  engine: identity=anthropic,contract=anthropic,surfaces=anthropic,docs=anthropic,regulatory=anthropic

demo.st API — frequently asked questions

Does demo.st have an API?

Yes. APIs.io lists 2 APIs from demo.st, including demo.st Document API and demo.st MCP Server.

How do I authenticate with the demo.st API?

demo.st uses bearer-token authentication (http · 2 schemes). The details are profiled on APIs.io as Demo St Authentication.

Does demo.st have an MCP server?

Yes. APIs.io lists 1 MCP server for demo.st: Official remote MCP server for demo.st. Tool list below is the verbatim result of a live tools/list call (JSON-RPC initialize + tools/list against the endpoint advertised at https://demo.st/.well-know

Is the demo.st API ready for AI agents?

demo.st has a Kin Score of 16.4 out of 100 (emerging) and an Agent Readiness score of 8.5 (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.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

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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