 GPT-5 series models, embeddings, and the Responses API with native MCP and tool use OpenAPI | llm+5 | OpenAPI | ACP+1 | api-key, Models | 5/5 | | |
 One OpenAI-compatible endpoint in front of hundreds of hosted models, with automatic fallback and per-key spend limits OpenAPIllms.txt | llm+3 | OpenAPI+1 | — | api-key, Models | 5/5 | | |
 Search and deep-research APIs built for agents, with tiered latency and citation-grade results MCPOpenAPIllms.txt | search+3 | MCP+2 | — | api-key, Search | 5/5 | | |
 Managed vector database with serverless indexes, integrated embedding, and an assistant MCP server MCPOpenAPIllms.txt | vector-db+3 | MCP+2 | — | api-key, Memory | 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 | | |
 Open-source vector search engine with managed cloud and an official MCP server MCPOpenAPIllms.txt | vector-db+3 | MCP+2 | — | api-key, Memory | 5/5 | | |
 Run thousands of open-source models — LLM, image, video, audio — behind one API OpenAPIllms.txt | llm+4 | OpenAPI+1 | — | api-key, Models | 5/5 | | |
 Email API for developers with React Email, batch sending, and an official MCP server MCPOpenAPIllms.txt | email+3 | MCP+2 | — | api-key, Messaging | 5/5 | | |
 Error and performance monitoring with AI agent tracing, plus a remote MCP server MCPOpenAPIllms.txt | errors+3 | MCP+2 | — | api-key, Observability | 5/5 | | |
 Storefront, Customer Account, Checkout, and Dev MCP servers plus ACP and UCP support across millions of merchants MCPOpenAPIllms.txt | commerce+5 | MCP+2 | ACP+2 | m2m-oauth, Merchants | 5/5 | | |
 Shared payment tokens, agentic network tokens, and ACP support so businesses can sell through AI agents MCPOpenAPIllms.txt | agentic-commerce+4 | MCP+2 | ACP+3 | api-key, Payments | 5/5 | | |
 Issue virtual cards agents can spend on, with real-time authorization decisions, per-card spend controls, and full transaction visibility MCPOpenAPIllms.txt | virtual-cards+4 | MCP+2 | MPP | api-key, Payments | 5/5 | | |
 Connected Apps and M2M auth — treat each agent as its own OAuth client, and stand up OAuth-compliant MCP servers MCPOpenAPIllms.txt | m2m-auth+4 | MCP+2 | — | m2m-oauth, Identity | 5/5 | | |
 Postgres with pgvector, auth, storage, edge functions, and a remote MCP server MCPOpenAPIllms.txt | database+4 | MCP+2 | — | api-key, Memory | 5/5 | | |
 Search, extract, and crawl endpoints tuned for RAG and agent loops MCPOpenAPIllms.txt | search+3 | MCP+2 | — | api-key, Search | 5/5 | | |
 Free bot API with instant programmatic token issuance and webhooks | telegram+2 | — | — | bot-token, Messaging | 5/5 | | |
 Open commerce standard from Google and Shopify for agentic shopping journeys across retailers, pairing with AP2 for the payment leg OpenAPIllms.txt | ucp+5 | OpenAPI+1 | UCP | none, Payments | 5/5 | | |
 API key issuance, per-key rate limits, and usage analytics for machine-to-machine access MCPOpenAPIllms.txt | api-keys+3 | MCP+2 | — | api-key, Identity | 5/5 | | |
 Serverless Redis, Vector, and QStash with per-request pricing and an official MCP server MCPOpenAPIllms.txt | redis+4 | MCP+2 | — | api-key, Memory | 5/5 | | |
 Voice agent platform handling telephony, turn-taking, interruptions, and warm transfers MCPOpenAPIllms.txt | voice-agents+3 | MCP+2 | — | api-key, Messaging | 5/5 | | |