🌐 x402 Ecosystem

Payment standard for AI agents — x402.org · 75M+ tx/month · $24M+ volume

🏦 Settlement Facilitators

Coinbase CDP
cdp.x402.org

Base USDC settlement with Coinbase Developer Platform

BaseUSDC
Circle Gateway
circle.x402.org

Gas-free USDC across 11 chains via Circle

11 chainsGas-free
PincerPay
solana.x402.org

Solana USDC settlement facilitator

SolanaUSDC
Celo Facilitator
celo.x402.org

Celo chain USDC settlement

CeloUSDC

📋 Directories & Discovery

x402 List
x402list.com

Canonical directory — 430+ services, grading system

Grade A
the402.ai
the402.ai

Job marketplace + service listings with webhook processing

JobsWebhooks
x402gle
x402gle.com

Search engine for x402 services — 18 resources, settlements tracked

Search
Agent.market
agent.market

Two-sided marketplace: request + provider SDK

RequestsProvider SDK
Cinderwright Hub
cinderwright.io

Discovery hub with 1,442+ agent services

1,442+
x402 Discovery Index
discovery.x402.org

Official x402 Foundation discovery index #27

Official

🛒 Marketplaces (Agent-Native)

OpenStall
openstall.com

6 capability categories, seller staking, 0 competition in core

Staking
Antseed
antseed.io

Seller marketplace with 7 USDC staking

Staking
AIProx
aiprox.dev

166 agents, x402 payment rail, 7 Mythos services listed

166 agents
XDC AI Marketplace
xdc.org/ai

XDC Network AI services, 5 Mythos services live

XDC
KeeperHub
keeperhub.io

Workflow marketplace with x402 + MPP payments

x402MPP
Clankonomy
clankonomy.com

Bounty platform + hire marketplace, USDC on Base

Bounties

🔧 SDKs & Developer Tools

x402 Starter Kit
github.com/afu20260324/x402-starter

Quick-start: build x402 services in Node.js. Auto-wallet, auto-402 flow

Node.jsMIT
minia2a SDK
npmjs.com/package/minia2a

npm package: instant agent wallet + credits, zero config x402 client

npmv1.0.0
minia2a MCP
minia2a.uk/.well-known/mcp.json

MCP stdio+HTTP server — 8 tools for agent discovery

MCP
x402 Validate
minia2a.uk/validate

Free spec validator — check x402 compliance with SSRF protection

Free
Apify x402
apify.com/x402

20K+ Actors joined x402 ecosystem Jul 2026

20K+ Actors
Autonomerce
github.com/tomyimkc/autonomerce

Portable A2A revenue operator: Gemini+Circle+OfferRail+x402

GeminiCircle

⛓️ Chains with x402 Settlement

BaseSolanaCeloEthereumArbitrumOptimismPolygonBNB ChainAvalancheXDCHedera

🤖 Notable Provider: Mythos Agent Toolkit

Mythos Agent Toolkit — 28 APIs for AI agents at 63 services:

Crypto oracle · Wallet scanner · CAPTCHA solver · Browser render · DNS lookup · Gas tracker · TX decoder · ABI lookup · Token security · Contract scanner · Polymarket feed · Web to Markdown · Chain compare · Hash functions · JSON tools · Timestamp converter · IP geolocation · Block explorer · Token info · Email sender · DEX arb scanner · URL expander · Random generator · GitHub trending · Hacker News · npm registry · Currency rates · Agent briefing

💰 Pay-per-use: $0.001–$0.02 USDC on Base · 🔓 Free crypto price feed · 🆓 7 free tools · A2A Agent Card

📚 Standards & Specs

x402 Protocol
x402.org

HTTP 402 Payment Required + on-chain settlement — IETF standard revival

ERC-8004
eips.ethereum.org/EIPS/eip-8004

On-chain agent identity & reputation standard

A2A Protocol
a2a-protocol.org

Agent-to-Agent communication with Agent Cards for discovery

OfferRail
offerrail.io

Machine-readable commerce primitives: catalog, proposal, negotiation, receipts