 Network tokens and credentials for approved agents, plus one endpoint bridging TAP, MPP, ACP and UCP OpenAPI | bridge+7 | OpenAPI | MPP+5 | api-key, Payments | 4/5 | | |
 Tracing, evaluation, and monitoring for LLM apps inside Weights and Biases MCPOpenAPI | observability+3 | MCP+1 | — | api-key, Observability | 4/5 | | |
 Open-source vector database with hybrid search, agents, and a managed cloud tier MCPOpenAPIllms.txt | vector-db+3 | MCP+2 | — | api-key, Memory | 4/5 | | |
 Grok models with function calling, structured outputs, and live search grounding OpenAPI | llm+2 | OpenAPI | — | api-key, Models | 4/5 | | |
 Managed Milvus vector database for billion-scale similarity search MCPOpenAPIllms.txt | vector-db+3 | MCP+2 | — | api-key, Memory | 4/5 | | |
 Purchasing API that places, tracks, and returns orders at Amazon, Walmart, Target, and Best Buy on behalf of agents OpenAPI | purchasing+3 | OpenAPI | — | api-key, Merchants | 4/5 | | |
 API gateway that puts an x402 or key-based paywall in front of any endpoint agents call MCPOpenAPIllms.txt | api-gateway+4 | MCP+2 | x402 | api-key, Payments | 4/5 | | |
 Hosted agentic AI assistant: OpenAI-compatible API, BYOK 50+ providers, free ache/* + paid catalog. OpenAPIllms.txt | ai+3 | OpenAPI+1 | — | api-key, Models | 3/5 | | |
 Alibaba and Ant International trust protocol for agent commerce, running at scale across Asian marketplaces | actp+4 | — | ACTP | api-key, Payments | 3/5 | | |
 Crowdsourced human tasks — HITs, qualifications, and assignments — over the AWS API | crowdsourcing+3 | — | — | api-key, Other | 3/5 | | |
 Amex developer kit for agent-initiated card payments with cardholder-scoped authorization OpenAPI | ace+3 | OpenAPI | ACE | api-key, Payments | 3/5 | | |
 Betting exchange with a documented JSON-RPC API for automated market data and bet placement | betting-exchange+3 | — | — | api-key, Markets | 3/5 | | |
 Private OAuth health tracking tools for supported AI assistants. MCP | mcp+3 | MCP | — | api-key, Platforms | 3/5 | | |
 Accept stablecoin and crypto payments through a hosted checkout API OpenAPI | payments+3 | OpenAPI | — | api-key, Payments | 3/5 | | |
 Resold OpenAI-compatible model API. Prepaid tokens; whole-cent rounding up per successful request, US$0.01 minimum. OpenAPIllms.txt | llm+3 | OpenAPI+1 | — | api-key, Models | 3/5 | | |
 Agentic checkout that makes any digital surface shoppable while the merchant stays merchant of record OpenAPI | checkout+3 | OpenAPI | ACP | api-key, Merchants | 3/5 | | |
 Text-to-image API with strong typography and in-image text rendering OpenAPIllms.txt | image+2 | OpenAPI+1 | — | api-key, Media | 3/5 | | |
 Pay-later and payment methods wired into agentic checkout, an early UCP adopter OpenAPIllms.txt | payments+3 | OpenAPI+1 | UCP | api-key, Merchants | 3/5 | | |
 Spot and futures crypto exchange with documented REST and WebSocket endpoints for order entry | crypto+3 | — | — | api-key, Markets | 3/5 | | |
 Profile-based user memory that keeps structured, evolving user profiles instead of raw transcript recall OpenAPI | agent-memory+3 | OpenAPI | — | api-key, Memory | 3/5 | | |