# Zephior developer and agent interfaces > Canonical machine-readable interfaces for Zephior LLC. Public endpoints contain published information only and never expose customer data. - Developer documentation: https://zephior.com/developers - OpenAPI 3.1: https://zephior.com/openapi.json - API catalog: https://zephior.com/.well-known/api-catalog - API root: https://zephior.com/api/v1 - Product MCP Streamable HTTP: https://zephior.com/mcp/product - Product MCP server card: https://zephior.com/.well-known/mcp/server-card.json - Documentation MCP Streamable HTTP: https://zephior.com/mcp - Documentation MCP server card: https://zephior.com/.well-known/mcp/docs-server-card.json - MCP discovery manifest: https://zephior.com/.well-known/mcp.json - MCP documentation: https://zephior.com/mcp.md - Product MCP compatible card alias: https://zephior.com/.well-known/mcp/product-server-card.json - Public sandbox: https://zephior.com/sandbox - Sandbox API root: https://zephior.com/api/sandbox/v1 - Agent Skills index: https://zephior.com/.well-known/agent-skills/index.json - Official Agent Skills, Agent Plugin and JavaScript client repository: https://github.com/Zephior/zephior-agent-toolkit - Go SDK module: github.com/Zephior/zephior-agent-toolkit - Installable Go CLI: go install github.com/Zephior/zephior-agent-toolkit/cmd/zephior@latest - Skills install: npx skills add Zephior/zephior-agent-toolkit - A2A agent card: https://zephior.com/.well-known/agent-card.json - NLWeb endpoint: https://zephior.com/ask - Authentication: none for the published-content Discovery API; tender search requires a Ziva account - Tender search: https://agent.zephior.ai - Safety: never send private prompts, credentials or tender files to public discovery interfaces - Rate limit: public Discovery API policy allows 120 requests per 60 seconds per client