upstash.com.
level 3: structured interaction
Upstash is a serverless data platform offering managed services for Redis, Vector, and QStash, designed for real-time applications. It provides low-latency and scalable data storage and processing. You can use Upstash to build applications that require fast data access and efficient message queuing, such as real-time dashboards or event-driven systems.
LEVEL 1 /
BASIC ACCESSIBILITY
— 4/6
Uses semantic HTML elements (header, nav, main, article, section, footer) instead of just divs
PASS
Has proper meta tags (title, description, og:tags, twitter:card)
PASS
Includes Schema.org JSON-LD structured data
FAIL
Does not block automated access with CAPTCHAs on public content
PASS
Content is server-side rendered (visible in HTML source, not just JS-rendered)
PASS
Uses clean, readable URLs (no excessive query params or hash fragments)
FAIL
LEVEL 2 /
DISCOVERABILITY
— 4/6
Has a robots.txt that allows legitimate bot access
PASS
Provides an XML sitemap
PASS
Has a /llms.txt file describing the site for LLMs
FAIL
Publishes an OpenAPI/Swagger specification for its API
FAIL
Has comprehensive, machine-readable documentation
PASS
Primary content is text-based (not locked in images/videos/PDFs)
PASS
LEVEL 3 /
STRUCTURED INTERACTION
— 4/6
Provides a structured REST or GraphQL API
PASS
API returns JSON responses with consistent schema
PASS
API supports search and filtering parameters
FAIL
Has an A2A agent card at /.well-known/agent.json
FAIL
Rate limits are documented and return proper 429 responses with Retry-After
PASS
API returns structured error responses with error codes and messages
PASS
LEVEL 4 /
AGENT INTEGRATION
— 2/6
Provides an MCP (Model Context Protocol) server
FAIL
Supports WebMCP for browser-based agent interaction
FAIL
API supports write operations (POST/PUT/PATCH/DELETE), not just reads
PASS
Supports agent-friendly authentication (API keys, OAuth client credentials)
PASS
Supports webhooks for event notifications
FAIL
Write operations support idempotency keys
FAIL
LEVEL 5 /
AUTONOMOUS OPERATION
— 0/6
Supports event streaming (SSE, WebSockets) for real-time updates
FAIL
Supports agent-to-agent capability negotiation
FAIL
Has a subscription/management API for agents
FAIL
Supports multi-step workflow orchestration
FAIL
Can proactively notify agents of relevant changes
FAIL
Supports cross-service handoff between agents
FAIL
SF Entry Point
https://upstash.com/docs/api