OpenAPI Studio
Workflow consolidator · 2026

Design, test, and publish AI-ready APIs in three tools.
One.

Visual flow builder, server-side execution, team workspaces, and a six-tool MCP server — in a single sub-2-second editor. Drop the Postman seat tax. Answer the AI-readiness mandate. Ship the spec.

$9/mo
flat — never per-seat
< 2s
first-paint at the edge
MIT
self-hostable, your data
The math, plainly

A 5-person team pays $95/mo for Postman seats.
OpenAPI Studio Pro is $9.

Not a "competitive" price. A 90% reduction, anchored to what your team already pays per-seat. Same workflow, 30-day execution history, server-side execution, and the six-tool MCP server included — no portal subscription on top.

The old way

Per month
Postman Team · 5 seats × $19 $95
Per-viewer / observer seat tax extra
Mock servers (limited) extra
Docs portal · separate vendor +$79
Effective cost $95/mo

OpenAPI Studio Pro

Flat rate
3 workspaces · 10 members incl.
25,000 executions / month incl.
50,000 MCP calls / month incl.
Private hotlinks · access tokens incl.
Six-tool MCP server · AI-ready incl.
All-in cost $9/mo

Source: Postman Team list price ($19/seat/mo, March 2026) × 5 seats. Pro tier here is flat $9/mo regardless of headcount, capped at 10 members and 3 workspaces — see /pricing for full limits. Self-hosted is $0 forever. Annual billing saves an additional 20%.

The promise · plainly

Three vertices. One tool that hits all three.

Most teams stitch three categories together: a spec editor, an API client, and an AI publishing layer. Each vendor optimises for the one they were born in. We refuse the trade-off.

01 / Design

Visual flow builder

Your API as a directed graph, not a YAML wall. Click an endpoint to edit; drag to restructure paths. Form-driven editors for every OpenAPI 3.x field — no syntax to memorise.

vs Swagger Editor: a text editor with autocomplete.
02 / Test

Server-side execution

Hit endpoints from inside the editor. The proxy worker handles CORS, captures full request/response, and keeps a 7-day execution history per endpoint. Pin responses worth keeping.

vs Postman: $12/seat for the same call.
03 / Publish

One-click MCP server

Every spec becomes six tools any AI agent can use: search · get · create · update · run · analyze. Auto-listed on the AI Coach registry. Claude Desktop and Cursor consume them natively.

vs everyone else: doesn't exist.

Only OpenAPI Studio holds all three vertices.

Apidog gets close — but charges per-seat and ships an MCP client, not a server. The rest pick a corner and stay there.

  • Postman Test ✓ · Design ◐ · MCP client only
  • Stoplight Design ✓ · Mock only · No MCP
  • Apidog All three — but per-seat, no MCP server
  • Scalar Refs ✓ · Client ✓ · MCP gen, manual
For the AI-readiness mandate

Your APIs, accessible to Claude. Cursor. Kilo.

The 2026 mandate from your VP isn't a pitch deck — it's a deadline. Publish your spec, get an MCP server in return. Six tools, fully RBAC-aware, ready to wire into any agent that speaks MCP.

Six tools, one auth handshake
search
Match endpoints by path, tag, method, or description.
get
Fetch endpoint detail with schemas and examples resolved.
create
Add a new endpoint to the spec. Editor role required.
update
Patch operation, params, schemas, or security blocks.
run
Execute via server-side proxy. Full response captured.
analyze
Validate the spec, surface drift, suggest fixes.
Tested with
Claude Desktop Claude Code Cursor Windsurf Kilo Code
Without the sleight of hand

Three things competitors charge for, included.

F·01

Cloud persistence, not localStorage

Every keystroke is saved to D1 at the edge. Sign in from any device, any browser. The "I lost my spec" support ticket disappears.

localStorage clears on cache wipe
→ D1 persistence + version history
F·02

Workspaces with real RBAC

Owner / Editor / Viewer. Invite by hashed email link. Viewers can execute APIs but can't modify the spec — perfect for QA, PMs, and clients.

$12/seat just to add a viewer
→ Unlimited members on Pro · $4 flat
F·03

Hotlinks & access tokens

Public spec at /v1/specs/your-slug.json, KV-cached at the edge. Private specs gated by access tokens. CORS handled. ETags handled.

$79/mo for a docs portal
→ Stable URL · <100ms response
Two readers · two reasons

Built for the developer and the manager who signs the bill.

For developers

Flow & Power

Time to first finished call is the metric you actually care about. We measure it in seconds.

  • Visual flow builder · click to edit, drag to restructure
  • Server-side execution · CORS handled, no Electron app
  • Import & convert · Swagger 2.0 → 3.0 in one step
  • Sub-2-second first paint · Cloudflare edge
  • Self-host on your own Cloudflare · MIT licensed
For managers

ROI & Governance

Justify the tool in a 2-minute conversation with your VP. Show the displaced cost, the AI-readiness story, and the audit trail.

  • $4/mo flat · cost-line you can defend in any review
  • AI-readiness reporting · per-spec, MCP-published checklist
  • Hotlink analytics · who consumes your specs, how often
  • Workspace RBAC · viewers can run but not modify
  • Self-hosted option · data sovereignty when required
Pricing · transparent

Five tiers. No per-seat tax, ever.

Flat rate per tier — no per-seat math, no surprise bills. Free covers solo devs. Pro replaces a 5-seat Postman bill at 90% off. Team and Agency unlock heavier execution and white-label hotlinks. Annual billing saves 20%.

Free

For solo devs & tiny teams

$0 forever

Everything you need to design, test, and share a single workspace.

  • 1 workspace · 3 members
  • 1,000 executions / mo
  • 1,000 MCP calls / mo
  • 7-day history
  • 1 published MCP spec
  • Public hotlinks
Start free
Pro

Replace your Postman seats

$9 / month · flat

The mainstream replacement for Postman. A 5-person team pays $95/mo for Postman — same workflow lands here at $9.

  • 3 workspaces · 10 members
  • 25,000 executions / mo
  • 50,000 MCP calls / mo
  • 30-day history
  • Private hotlinks · access tokens
  • Unlimited MCP specs
  • Workspace credential vault
Upgrade to Pro
Team

AI-forward & power users

$29 / month · flat

For teams running real AI agent traffic against MCP-published specs. Headroom + governance.

  • 10 workspaces · 25 members
  • 100,000 executions / mo
  • 250,000 MCP calls / mo
  • 90-day history
  • Hotlink analytics
  • Custom slugs
  • Governance rules
Upgrade to Team
Agency

One workspace per client

$79 / month · flat

White-label developer portal for agencies. Per-client isolation, custom-domain hotlinks, brandable MCP names.

  • Unlimited workspaces · 50 members
  • 500,000 executions / mo
  • 1M MCP calls / mo
  • 90-day history
  • Custom-domain hotlinks
  • White-label MCP server names
  • Client isolation
Upgrade to Agency
Enterprise

When you need a contract

Custom limits and a real contract. SSO, SCIM, and audit logs ship as we validate the request — not before.

  • Custom workspaces & members
  • Custom execution / MCP limits
  • Custom history retention
  • SSO · SCIM · audit logs *
  • SLA & dedicated support
  • * shipped on validated demand
The math, plainly

Anchored to what your team already pays, not to competitor list price.

  • Postman Team · 5 seats $95
  • Stoplight Basic $66
  • Apidog Basic · 5 seats $45
  • OpenAPI Studio Pro $9 flat
Open cohort · Founding Testers

Help shape OpenAPI Studio.
Get a Special Gift for it.

Use the product, file high-signal reports, earn a hand-picked gift from real brands and a permanent Founding Tester badge. No card, any plan tier, drop out anytime.

Five minutes from now

You'll have a spec, a green test, and an MCP server.

No credit card. No "book a demo." Sign in with GitHub, import your existing spec, and watch the flow builder render it. If it isn't faster than what you have, send us the bill for the time.

MIT-licensed source on GitHubNo per-seat pricing on any tierSub-2-second first paint at the edgeCancel from your dashboard, never email support