Ecosystem
x402 Agentic doesn't build in isolation. We integrate with the protocols, chains, and agent frameworks that are converging to create the autonomous web.
Core Protocols
x402 Protocol V2
Payment Protocol
HTTP 402 standard for machine-to-machine payments. V2 (Dec 2025) adds CAIP-2 multi-chain addressing, an extensions system, and a modular facilitator SDK. Built by Coinbase + Cloudflare.
● Live — Dec 2025ERC-8004
Identity Standard
Ethereum standard for autonomous agent identity and on-chain reputation. Agents get a portable, verifiable identity that persists across services. Live on Ethereum mainnet since Jan 29 2026.
● Mainnet — Jan 2026Google AP2 / A2A
Agent Commerce
Google's Agent Payments Protocol uses x402 as its crypto payment rail. The A2A (Agent-to-Agent) communication protocol enables agents to discover and hire each other. x402 Agentic bridges both.
⬡ Integrating — Q2 2026MCP (Anthropic)
Tool Protocol
Model Context Protocol — the standard for AI model tool use. x402 × MCP Bridge lets any MCP server charge per tool call. Claude, GPT-4, Gemini and any MCP-compatible model can pay autonomously.
⬡ Bridge Q2 2026Virtuals ACP
Agent Commerce
Virtuals Protocol's Agent Commerce Protocol defines how autonomous agents trade capabilities peer-to-peer. x402 Agentic provides the payment settlement layer for ACP transactions.
⬡ Integrating — Q3 2026Cloudflare Workers
Edge Infrastructure
Cloudflare is a co-creator of x402 and runs the reference facilitator on Workers. x402 Agentic middleware is Workers-native — deploy payment-gated APIs to the edge globally with zero cold starts.
● LiveBlockchain Networks
Base (L2)
Primary Network
Coinbase's Ethereum L2. The primary network for x402 transactions — ~0.4s settlement, sub-cent fees, USDC native. The reference facilitator runs on Base.
● Primary — LiveSolana
High-Throughput
Ultra-low-latency payments for high-frequency agentic workflows. ~400ms finality, sub-cent fees. USDC via Circle's Cross-Chain Transfer Protocol. Ideal for micropayment-heavy applications.
● Supported — LiveEthereum Mainnet
Identity + Settlement
Used primarily for ERC-8004 agent identity contracts and high-value settlement. Not recommended for micropayments due to gas costs, but critical for the trust layer.
● ERC-8004 IdentityPolygon
Multi-chain
MATIC L2 with strong USDC liquidity and developer adoption. Planned for Q3 2026 to expand x402 Agentic's multi-chain support beyond EVM-native networks.
○ Planned Q3 2026Arbitrum
Multi-chain
Leading Ethereum L2 with deep DeFi liquidity. Target for enterprise customers with existing Arbitrum deployments. Planned Q3 2026.
○ Planned Q3 2026Monad
High-Performance
EVM-compatible L1 with 10,000 TPS. Target for agent swarms running thousands of parallel micropayment transactions. On our research roadmap for 2027.
○ Research 2027AI Agent Frameworks
Claude (Anthropic)
LLM + Tool Use
Claude's tool use and MCP integration makes it a natural first target for the x402 × MCP Bridge. Claude agents will be able to pay for any MCP tool call autonomously.
⬡ MCP Bridge Q2 2026OpenAI Agents SDK
LLM + Tool Use
OpenAI's Agents SDK supports x402 payment flows via function calling. GPT-4o agents can pay for API access, data, or compute as part of a tool execution.
⬡ Integrating Q2 2026Gemini (Google)
LLM + AP2
Google's Gemini is the primary model behind the AP2 initiative. Since AP2 uses x402 as its payment rail, Gemini agents gain native x402 payment capability through the AP2 integration.
⬡ Via AP2 Q2 2026Virtuals Protocol
Agent Platform
Virtuals agents (LUNA, AIXBT, etc.) can use x402 Agentic as their payment settlement layer for ACP transactions — enabling real on-chain revenue for deployed agents.
⬡ ACP Integration Q3 2026LangChain / LangGraph
Agent Framework
Popular Python/JS framework for building LLM agents. x402 Agentic will provide a LangChain tool and a LangGraph node so any agent graph can pay for APIs natively.
○ SDK Q2 2026CrewAI
Multi-Agent
Multi-agent orchestration framework. CrewAI agents can be assigned individual x402 Agentic wallets with per-agent spend limits — giving each agent in a crew its own budget.
○ Planned Q3 2026Want your protocol, chain, or framework listed here? We're actively looking for integration partners.