Onlook

https://onlook.com
28
Needs Work
Agent Native Score

Onlook is an open-source IDE for building web applications with visual editing and AI-assisted development capabilities. It combines code editing with visual design tools to streamline frontend development.

Categories: Web Development · Ide
#3 of 4 in Web Development · #4 of 4 in Ide
Checklist Breakdown

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Discovery 35%

Can an agent find and understand this tool without a web search?

— Published OpenAPI/Swagger spec
— Has llms.txt or llms-full.txt
— Has an MCP server (official or well-maintained)
— MCP server listed in a public registry
— API reference docs are publicly accessible
— Docs include runnable code examples
— Has a public changelog or release notes
— Has a public status page
Auth & Onboarding Not yet scored

Can an agent create an account and get credentials without human intervention?

— Signup does not require CAPTCHA
— Signup does not require phone verification
— Supports API key auth (not only OAuth)
— API key obtainable without manual approval
— No mandatory billing info to start
— Can sign up without creating an organization
Pricing Not yet scored

Can an agent operate autonomously without upfront payment or contracts?

— Has a free tier
— Usage-based pricing available
— No minimum contract or commitment
— Pricing page is public (no 'contact sales')
— Free tier sufficient for testing (not just a trial)
Agent Tooling Requires account Not yet scored

How well does the API work for non-human consumers?

— SDK available in 2+ languages
— Structured error responses (JSON with error codes)
— Idempotency support on write endpoints
— Pagination on list endpoints
— Webhook/event support
— Sandbox or test mode available
— Rate limit headers in responses
— Consistent REST resource naming
Reliability Requires account 35%

Does the tool fail gracefully when an agent makes a mistake?

— Meaningful error messages (not just 500)
— 429 responses include Retry-After header
— Documented uptime SLA (99.9%+)
— Graceful degradation under rate limits
— Request IDs in responses for debugging
— API versioning supported
Reviewer Notes

Onlook is primarily a visual IDE for developers rather than an agent-native tool. It lacks essential agent integration infrastructure: no MCP server, no OpenAPI spec, and no programmatic API for agents to interact with. Authentication requires OAuth2 (GitHub/Google), preventing autonomous account creation. The tool is open-source on GitHub, which aids discovery, but there's no structured API documentation or agent-friendly endpoints. Best suited as a developer tool rather than an autonomous agent integration point. Main weakness is complete absence of API/programmatic access patterns that agents need.

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