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
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.
OpenAPI Studio Pro
Flat rateSource: 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%.
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.
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.
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.
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.
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
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.
# In Claude Desktop, after connecting your spec… user> Find every endpoint that accepts a Stripe customer id claude> search(query="customer_id parameter") → 4 endpoints matched GET /v1/customers/{id} POST /v1/charges GET /v1/subscriptions DELETE /v1/payment_methods/{id} user> Run the GET on the staging server with id=cus_test_42 claude> run(method="GET", path="/v1/customers/{id}", server="staging", params={ id: "cus_test_42" }) → 200 OK · 184ms · {"id": "cus_test_42", "email": "a@b.io", …} # Editor scope: viewer can run; editor can update; owner can delete.
Three things competitors charge for, included.
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.
→ D1 persistence + version history
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.
→ Unlimited members on Pro · $4 flat
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.
→ Stable URL · <100ms response
Built for the developer and the manager who signs the bill.
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
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
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%.
For solo devs & tiny teams
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
Replace your Postman seats
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
AI-forward & power users
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
One workspace per client
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
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
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
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.
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.