Flowstep

Flowstep is an AI design tool that generates multi-screen UI from natural language prompts. It enables users to edit designs via chat or manually, copy outputs to Figma, export code, or integrate with IDEs through its MCP. The platform aims to democratize design for product teams, offering a free tier and paid plans, with a focus on data privacy and security.

Flowstep is listed with 2 APIs on the APIs.io network. Tagged areas include Artificial Intelligence, Design, UI, Collaboration, and Software-as-a-Service.

The Flowstep catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Flowstep’s developer surface includes changelog, authentication, engineering blog, pricing, getting-started guide, documentation, and 19 more developer resources.

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35.6/100 thin Agent 47/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

2 APIs

Artificial Intelligence Design UI Collaboration Software-as-a-Service

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 35.6/100 · thin

Contract Quality 4.6 / 21

Developer Ergonomics 6.1 / 17

Access Clarity 7.2 / 17

Operational Transparency 2.6 / 11

Contract Governance 2.2 / 10

Discoverability 5.8 / 9

Regulatory Posture 4.2 / 15

Agent readiness — 47/100 · agent ready

Machine-Readable Contract 18 / 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 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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):

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

5 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 21.8 — up to +19.6 composite points Ask about this →
Developer Ergonomics scores 35.7 — up to +12.9 composite points Ask about this →
Access Clarity scores 42.6 — up to +11.5 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/flowstep-ai/apis.yml: open an issue on github.com/api-evangelist/flowstep-ai 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 4

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.

Agent2Agent

measured — observed by APIs.io (conformant)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 2

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

Flowstep API

API for Flowstep AI design platform, documented at the Flowstep docs site.

Flowstep API

Flowstep API as documented publicly: 2 operations. Contract generated from the documentation by API Evangelist (2026-11-08); not the provider's own document.

Flowstep API pricing

Prices published by Flowstep, read 2026-11-08 from flowstep.ai/pricing.

Plan	Price
Free	$0/month
Starter	$15/month

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Flowstep Plans Pricing

2 plans

PLANS

Semantic Vocabularies 1

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

Flowstep Ai Context

2 classes · 7 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Flowstep API Rules

36 rules · 34 error-severity 1 warn-severity 1 info-severity

SPECTRAL

JSON Schema 2

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

PostMcpRequest

3 properties

JSON SCHEMA

PutResponse

5 properties

JSON SCHEMA

Security Posture 3

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

Flowstep Authentication

2 schemes

SECURITY

Flowstep Domain Security

TLSv1.3 · DMARC

SECURITY

Flowstep Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Access & Security 5

Authentication, authorization, and security posture

Security

Security

Authentication

Authentication

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 3

Properties that don't map to a standard resource type

Vendors

Vendors

AgentCard

AgentCard

Hosts

Hosts

Source (apis.yml)

aid: flowstep-ai
name: Flowstep
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  probe_state: unreadable
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://flowstep.ai/og-image.png
description: Flowstep is an AI design tool that generates multi-screen UI from natural language prompts. It enables users
  to edit designs via chat or manually, copy outputs to Figma, export code, or integrate with IDEs through its MCP. The platform
  aims to democratize design for product teams, offering a free tier and paid plans, with a focus on data privacy and security.
url: https://artifacts.apis.io/flowstep-ai/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-08 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-08'
modified: '2026-11-08'
tags:
- Artificial Intelligence
- Design
- UI
- Collaboration
- Software-as-a-Service
tags_raw:
- AI
- Design
- UI
- Collaboration
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Vendors
  url: vendors/flowstep-ai-vendors.yml
- type: Plans
  url: plans/flowstep-ai-plans-pricing.yml
- type: Spectral
  url: rules/flowstep-ai-rules.yml
- type: JSONLD
  url: json-ld/flowstep-ai-context.jsonld
- type: Vocabulary
  url: vocabulary/flowstep-ai-vocabulary.yml
- type: DataModel
  url: data-model/flowstep-ai-data-model.yml
- type: ChangeLog
  url: changelog/flowstep-ai-changelog.yml
- type: Security
  url: security/flowstep-ai-vulnerability-disclosure.yml
- type: Authentication
  url: authentication/flowstep-ai-authentication.yml
- type: Conformance
  url: conformance/flowstep-ai-conformance.yml
- type: LLMsTxt
  url: llms/flowstep-ai-llms.txt
- type: AgentCard
  url: a2a/flowstep-ai-a2a.yml
- type: SecurityTxt
  url: well-known/flowstep-ai-security.txt
- type: WellKnown
  url: well-known/flowstep-ai-well-known.yml
- type: Hosts
  url: hosts/flowstep-ai-hosts.yml
- type: TermsOfService
  url: https://flowstep.ai/terms-of-use
- type: PrivacyPolicy
  url: https://flowstep.ai/privacy-policy
- type: ChangeLog
  url: https://docs.flowstep.ai/changelog
- type: Blog
  url: https://flowstep.ai/blog
- type: Pricing
  url: https://flowstep.ai/pricing
- type: GettingStarted
  url: https://docs.flowstep.ai/getting-started
- type: Documentation
  url: https://docs.flowstep.ai/
- type: VulnerabilityDisclosure
  url: security/flowstep-ai-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/flowstep-ai-domain-security.yml
- type: Website
  url: https://flowstep.ai/
apis:
- name: Flowstep API
  description: API for Flowstep AI design platform, documented at the Flowstep docs site.
  humanURL: https://docs.flowstep.ai/
  aid: flowstep-ai:flowstep-api
- aid: flowstep-ai:flowstep-ai-api
  name: Flowstep API
  description: 'Flowstep API as documented publicly: 2 operations. Contract generated from the documentation by API Evangelist
    (2026-11-08); not

    the provider''s own document.'
  humanURL: https://docs.flowstep.ai/mcp/authentication
  baseURL: https://api.flowstep.ai
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/flowstep-ai-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/flowstep-ai-put-response-schema.json
  - type: JSONSchema
    url: json-schema/flowstep-ai-post-mcp-request-schema.json
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Docs are rendered via Mintlify, no machine‑readable OpenAPI spec discovered.
  evidence:
  - url: https://docs.flowstep.ai/api-docs
    status: 404
  checked: '2026-11-08'
x-enrichment:
  date: '2026-11-08'
  status: enriched
  artifacts_added: 28
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Flowstep API — frequently asked questions

Does Flowstep have an API?

Yes. APIs.io lists 2 APIs from Flowstep, including Flowstep API and Flowstep API.

Is there an OpenAPI specification for the Flowstep API?

Yes. APIs.io indexes 1 OpenAPI specification for Flowstep, each linked for download from this page.

How do I authenticate with the Flowstep API?

Flowstep documents its authentication (2 schemes). The details are profiled on APIs.io as Flowstep Authentication.

How much does the Flowstep API cost?

Flowstep publishes its prices; its Free plan is $0/month as of 2026-11-08. APIs.io lists 2 pricing plans for Flowstep, with each plan's price, limits and inclusions under Pricing on this page.

Is the Flowstep API ready for AI agents?

Flowstep has a Kin Score of 35.6 out of 100 (thin) and an Agent Readiness score of 46.7 (agent-ready), scored by API Evangelist on 2026-11-13.

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