 Anthropic SDK for building agents with tool use, MCP servers, Agent Skills, and subagents llms.txtskill | agents+4 | llms.txt+1 | — | api-key, Platforms | 5/5 | | |
 Framework for durable agents on Workers, with built-in payment support across x402 and the Visa and Mastercard agent schemes MCPOpenAPIllms.txt | agents+5 | MCP+2 | Agent Pay+2 | api-key, Platforms | 5/5 | | |
 Managed auth plus hundreds of app integrations, exposed to agents through the Rube MCP server MCPOpenAPIllms.txt | tools+3 | MCP+2 | — | api-key, Platforms | 5/5 | | |
 Hosted runtime for stateful agent graphs with persistence, streaming, and human-in-the-loop MCPOpenAPI | agents+3 | MCP+1 | — | api-key, Platforms | 5/5 | | |
 Open-source workflow automation with a public API, webhook triggers, and MCP nodes MCPOpenAPIllms.txt | automation+4 | MCP+2 | — | api-key, Platforms | 5/5 | | |
 Managed auth and 2,500+ app APIs agents can call directly, plus MCP servers per app MCPOpenAPI | automation+3 | MCP+1 | — | api-key, Platforms | 5/5 | | |
 Thousands of app actions exposed to agents through a hosted MCP endpoint, no per-app integration work MCPOpenAPIllms.txt | automation+3 | MCP+2 | — | api-key, Platforms | 5/5 | | |
 Multi-agent orchestration framework with a hosted control plane for deployment OpenAPIllms.txt | agents+3 | OpenAPI+1 | — | api-key, Platforms | 4/5 | | |
 Open-source framework for building and deploying agents, with A2A interop and Vertex AI Agent Engine OpenAPI | agents+4 | OpenAPI | — | api-key, Platforms | 4/5 | | |
 Event-driven durable workflows with step functions, concurrency controls, and AgentKit MCPOpenAPIllms.txt | workflows+3 | MCP+2 | — | api-key, Platforms | 4/5 | | |
 Open-source MCP infrastructure — hosted servers, OAuth, and multi-tenant tool access for agents MCPOpenAPIllms.txt | mcp+3 | MCP+2 | — | api-key, Platforms | 4/5 | | |
 Framework and integrations for LLM apps and agents, with LangSmith and LangGraph alongside OpenAPI | agents+3 | OpenAPI | — | api-key, Platforms | 4/5 | | |
 TypeScript agent framework with workflows, memory, evals, and a deployable server MCPOpenAPIllms.txt | agents+4 | MCP+2 | — | api-key, Platforms | 4/5 | | |
 Registry and hosting for MCP servers, with one-click deploy and hosted endpoints MCPOpenAPI | mcp+3 | MCP+1 | — | api-key, Platforms | 4/5 | | |
 Durable execution for long-running agent workflows, with retries and full history replay MCPOpenAPIllms.txt | workflows+3 | MCP+2 | — | api-key, Platforms | 4/5 | | |
 Open-source background jobs and durable AI workflows with long-running tasks and retries MCPOpenAPIllms.txt | workflows+3 | MCP+2 | — | api-key, Platforms | 4/5 | | |
 Private OAuth health tracking tools for supported AI assistants. MCP | mcp+3 | MCP | — | api-key, Platforms | 3/5 | | |
 AI social media workspace with an agent API for content creation, publishing, monitoring, and engagement. llms.txt | social-media+3 | llms.txt | — | api-key, Platforms | 3/5 | | |