x402 Ecosystem

26 projects, chains, and tools shipping on or around the x402 payment protocol.

AI Lab

Anthropic

Creator of Claude and the Model Context Protocol (MCP) - MCP tools can use x402 to pay for upstream APIs.

Google Cloud

Ships an A2A x402 extension for Vertex AI Agents and a reference implementation of AP2 (Agent Payments Protocol). Founding member of the x402 Foundation.

@GoogleCloud · cloud.google.com →

OpenAI

Agent runtime vendor. OpenAI has not shipped official x402 endpoints, but community wrappers exist that add x402 payment handling to calls against some OpenAI APIs.

@OpenAI · openai.com →

Agent Framework

LangChain

Popular agent framework. A community x402 toolkit is available for wrapping LangChain tool calls with payment flows, but x402 is not yet upstreamed into the core LangChain package.

@LangChainAI · langchain.com →

Agent Infra

Browserbase

Headless browser infra for AI agents - a natural consumer of x402-priced APIs.

@Browserbase · browserbase.com →

Agent Product

AgentMail

Email inbox API for AI agents with x402 payment support alongside traditional API keys.

@agentmail · agentmail.to →

Analytics

Nansen

On-chain analytics platform offering pay-per-call API access via x402, exposing its data to AI agents on Base and Solana.

@nansen_ai · nansen.ai →

Chain

Aptos

Move-based L1 that has shipped early x402 integrations via its foundation-led grants programme.

@Aptos · aptosfoundation.org →

Avalanche

High-throughput L1 with a growing stablecoin ecosystem and active x402 experimentation.

@avax · avax.network →

Base

Coinbase's Ethereum Layer 2 built on the OP Stack - the primary settlement network for x402 payments.

@base · base.org →

Polygon

EVM chain ecosystem with x402 facilitator support for low-cost USDC settlement.

@0xPolygon · polygon.technology →

SKALE

Zero-gas EVM chain network positioning for agent payments.

@SkaleNetwork · skale.space →

Solana

High-throughput Layer 1 supported by x402 facilitators for USDC micropayments.

@solana · solana.com →

Gateway

Zuplo

API gateway with native x402 middleware for pay-per-call endpoints.

zuplo.com →

Infrastructure

Alchemy

Blockchain infra provider shipping AgentPay, a router that bridges x402 and rival agent-payment protocols.

@Alchemy · alchemy.com →

Cloudflare

Edge platform with native x402 support for Workers and AI Gateway, enabling pay-per-request enforcement at the CDN layer. Founding member of the x402 Foundation.

@cloudflare · cloudflare.com →

OnFinality

Multi-chain RPC provider publishing x402 integration guides.

@OnFinality · onfinality.io →

QuickNode

RPC and chain-infra provider publishing x402 integration guides for Node and Go.

@QuickNode · quicknode.com →

Onramp

MoonPay

Fiat on-ramp that can fund wallets for x402 payments.

@moonpay · moonpay.com →

Payments

Stripe

Payments giant with live x402 integration since February 2026, exposing stablecoin rails through Stripe's Climate API and PaymentIntents. Founding member of the x402 Foundation.

@stripe · stripe.com →