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About

AG-UI is an open, lightweight, event-based protocol that standardizes how AI agents connect to user-facing applications. Built for simplicity and flexibility, it enables seamless integration between AI agents, real-time user context, and user interfaces. AG-UI is designed for agent-human interaction: during agent executions, backends emit events compatible with standard AG-UI event types, and agent backends can accept simple AG-UI-compatible inputs as arguments. It works with any event transport, including SSE, WebSockets, webhooks, and other streaming systems, while providing a flexible middleware layer that ensures compatibility across diverse environments. AG-UI brings agents into user-facing applications and complements the wider agentic protocol stack: MCP gives agents tools, A2A allows agents to communicate with other agents, and AG-UI connects agents directly to the user interface.

About

Google’s Agent Payments Protocol (AP2) is an open protocol designed together with over 60 payments, fintech, and tech companies (e.g., Mastercard, PayPal, Adyen, Coinbase, Etsy) to enable secure, agent-led transactions across platforms. It builds on earlier open standards like Agent2Agent (A2A) and the Model Context Protocol (MCP) to ensure that when an AI agent initiates or completes a payment on behalf of a user, three core requirements are met: authorization (proving the user explicitly gave permission for that specific purchase), authenticity (ensuring the agent’s intended purchase matches what the user meant), and accountability (clear audit trails and responsibility in case of errors or fraud). The protocol uses mandates, which are cryptographically signed digital contracts backed by verifiable credentials.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

AI product developers building interactive agent-powered applications that need structured streaming, tool calls, shared state, and human-in-the-loop control

Audience

Developers, merchants, payment providers, and platform builders requiring a tool to enable AI agents to execute transactions on behalf of users

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version
Free Trial

Pricing

No information available.
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

AG-UI
United States
ag-ui.com

Company Information

Google
Founded: 1998
United States
cloud.google.com/blog/products/ai-machine-learning/announcing-agents-to-payments-ap2-protocol

Alternatives

Alternatives

LangGraph

LangGraph

LangChain
TF-Agents

TF-Agents

Tensorflow
Flowise

Flowise

Flowise AI

Categories

Categories

Integrations

Model Context Protocol (MCP)
1Password
Agno
Airwallex
American Express Go
Checkout.com
Coinbase Cloud
Etsy
Forter
Gr4vy
Intuit Field Service Management
Juspay
LlamaIndex
Manus AI
Mastercard Payment Gateway Services
Mastra AI
Mesh
MetaMask
PayPal
ServiceNow

Integrations

Model Context Protocol (MCP)
1Password
Agno
Airwallex
American Express Go
Checkout.com
Coinbase Cloud
Etsy
Forter
Gr4vy
Intuit Field Service Management
Juspay
LlamaIndex
Manus AI
Mastercard Payment Gateway Services
Mastra AI
Mesh
MetaMask
PayPal
ServiceNow
Claim AG-UI and update features and information
Claim AG-UI and update features and information
Claim Agent Payments Protocol (AP2) and update features and information
Claim Agent Payments Protocol (AP2) and update features and information