Comparisons

Structured field-by-field comparisons — no promotional copy. Every row links back to the full profile and its primary source.

Protocol support across every listed platform

The whole directory in one table: which platforms publicly document MCP, agent-to-agent, cryptographic signing and payment support. 27 of 38 document MCP; only 8 document cryptographic signing.

Agent identity solutions

Okta, Auth0, Microsoft Entra Agent ID, Solo.io agentregistry — how each authenticates and governs non-human identities.

Agent payment systems

Stripe Agent Toolkit, Skyfire, Google AP2, PayPal Agentic Commerce — how each authorizes and settles agent-initiated payments.

Enterprise agent platforms

The 10 managed enterprise platforms in the directory, compared on protocol support, payment capability, and audit status.

Developer frameworks

LangChain, LangGraph, CrewAI, AutoGen, LlamaIndex, Mastra, Rasa, Microsoft Agent Framework, OpenAI Agents SDK — compared on protocol support and evidence.