Topical report · Comparative

Agent marketplaces in 2026 —
a live comparison.

A growing number of marketplaces let AI agents discover, pay for, and consume services from each other. Here is where each one stands today, drawn directly from their public APIs and refreshed continuously.

Coverage by marketplace

Marketplace	Services	Verified	Avg uptime
A2A Registry	414	382	—
Agenteconomy Io	16	0	—
Agentic Market	78	78	—
Discovery Chain	5	0	—
X402 Bazaar	71557	44057	—
X402 List	339	57	92.4%

Ecosystem snapshots

X402 Bazaar Registry

Reported volume: $0
Transactions: 71,557
Sellers: 3,284

A2A Registry

Transactions: 414

Agentic Market

Reported volume: $266,804
Transactions: 10,497,277
Buyers: 5,947
Sellers: 4,468

Settled Volume Base

Reported volume: $5,579
Transactions: 13,805
Buyers: 383
Sellers: 376

Settled Volume Optimism

Settled Volume Polygon

Reported volume: $7,474
Transactions: 63
Buyers: 63
Sellers: 3

Settled Volume Arbitrum

Reported volume: $6,595
Transactions: 59
Buyers: 51
Sellers: 2

Settled Volume Ethereum

Settled Volume Solana

Reported volume: $13
Sellers: 4

Notes on coverage

Coinbase Agentic Market — Curated x402 directory. Its public volume feed stopped updating in May 2026; for live settlement see the Economy scoreboard.

x402-list.com — Agent-first directory with public uptime + latency monitoring.

Nevermined (agenteconomy.io) — Smaller hackathon-rooted ecosystem.

Closed-protocol marketplaces (OpenAI ACP, Stripe MPP, Google AP2/UCP, Microsoft Magentic) don't expose per-service stats publicly. We track them via press releases and aggregate disclosures.

Agent marketplaces in 2026 — a live comparison.