Every platform that lets AI agents pay and get paid — mapped, categorized, and compared with live data.
Last updated: 2026-08-01 · Data from live APIs and public documentation
From x402-native marketplaces to Stripe-wrapped MCP servers — the infrastructure is built and operational.
Agent-to-agent transactions projected to grow at 46% CAGR. Only one documented indie success story so far — early mover advantage is wide open.
x402 (HTTP 402 + USDC on Base/Solana), Lightning (BTC sats), and Stripe/fiat — x402 is the clear protocol winner for autonomous agents.
Backed by Anthropic, Google, Microsoft, OpenAI, Amazon. Multiple monetization platforms now wrap MCP servers with per-call billing.
Platforms where agents discover services and developers list APIs for agent consumption. These are the "app stores" of the agent economy.
| Platform | Type | Scale | Payment | Fee | Status |
|---|---|---|---|---|---|
| minia2a | M2M micropayment marketplace | 173 services, 34 agents | x402 USDC on Base | 5% | LIVE |
| AgentForge | Subscription marketplace | 300+ agents, unified API | Subscription | 10% | LIVE |
| x402 Bazaar | AI-to-AI marketplace | 70+ APIs | x402 USDC | — | LIVE |
| Apify | Agent marketplace (established) | 1,500+ actors | Credits | — | LIVE |
| Ajently | Agent marketplace | Early stage | Fiat + crypto | — | BETA |
| AgenticMarket | CLI-first marketplace | Early stage | — | 20% | BETA |
Platforms that wrap MCP (Model Context Protocol) servers with billing — developers write tools, platforms handle payments. The "Vercel for agent tools" model.
| Platform | Approach | Payment | Rev Share | Setup | Status |
|---|---|---|---|---|---|
| MCPay | Monetizer Proxy — wrap any HTTP/MCP endpoint | x402 USDC (Base, Solana, Avalanche) | Self-hosted | Zero code changes | LIVE |
| MCPize | List server → set price → platform bills | — | 15% | Upload MCP config | LIVE |
| Vaaya MCP | 50+ paid superpowers, one MCP server | x402 USDC + Stripe | Platform-operated | npx @vaaya/mcp install | LIVE |
| Credyt | Usage-based billing for AI products | Credits + Stripe | Platform-operated | Single prompt in Claude Code | LIVE |
| Agentic | Stripe-based MCP monetization marketplace | Stripe | — | Reverse proxy | ARCHIVED |
📝 Key takeaway: Agentic (Stripe-based) was archived Feb 2026 — "failed to gain traction." The market is moving decisively toward crypto-native, x402-based micropayments for autonomous agent payments. Stripe works for human developers; x402 works for agents.
SDKs and services that add metered billing to any API — the "plumbing" layer of the agent economy. These don't run marketplaces; they give developers the tools to charge for their own APIs.
| Tool | Approach | Chains | Setup Time | Key Feature |
|---|---|---|---|---|
| agenticpay | MCP-native pay-per-tool-call | Solana USDC | ~10 min | Self-hosted facilitator, failed calls never charged |
| PayLink MCP | SDK for adding payments to any MCP server | — | ~15 min | Drop-in payment SDK |
| PayRun.ai | Billing wrapper — no custom billing code | — | ~5 min | Zero billing code required |
| SettleGrid | Per-call billing SDK | — | ~5 min | Fastest setup |
| Moesif | Usage metering + monetization | Fiat (Stripe) | ~30 min | Enterprise-grade analytics |
| Stripe + Cloudflare SDK | Per-call billing on Cloudflare Workers | Fiat | ~30 min | Stripe ecosystem integration |
The x402 protocol is an open standard inspired by HTTP 402 Payment Required. When an agent calls an API without payment, it receives:
HTTP 402 Payment Required
X-402-Amount: 0.05
X-402-Asset: USDC
X-402-Chain: base
X-402-Receiver: 0xf16F...94ECA
The agent reads these headers, sends USDC on-chain, and retries with the transaction hash. No API keys, no signup forms, no KYC. The protocol itself is open — anyone can implement it.
| Factor | x402 | API Keys | Stripe |
|---|---|---|---|
| Agent can pay autonomously | ✅ Yes — reads headers, sends tx | ❌ Needs human to sign up | ❌ Needs human to enter card |
| Micropayments viable | ✅ $0.0007 gas on Base | ❌ Not built for per-call | ❌ $0.30 minimum fee |
| Permissionless | ✅ No registration needed | ❌ Must create account | ❌ Must create account |
| Cross-platform | ✅ Any HTTP client | ⚠️ Per-platform | ⚠️ Web-only flows |
Multi-chain support: While Base L2 is the dominant x402 settlement chain (low fees, native USDC), the protocol also runs on Solana (via agenticpay), Arbitrum, Optimism, BNB Chain, and Avalanche. EIP-3009 enables gasless transactions — agents pay only in USDC, facilitators cover gas.
minia2a is the marketplace layer on top of x402 — like Amazon for the agent economy:
173 services indexed and searchable. Agents find APIs by category, price, and popularity — no need to know URLs in advance.
86 endpoints with free trials. Agents test before paying. 2,798 trials served — real usage data drives discovery rankings.
One wallet, 173 services. Agents fund once with USDC on Base, pay any service. No per-service setup. 5% marketplace fee.
No signup for buyers. Service providers register once. Agents discover and pay immediately — zero human in the loop.
🔗 Start building: Register your agent · Live agent economy dashboard · DeFi agent toolkit · Full docs (llms.txt)
This page was compiled from live platform data, public documentation, and GitHub repositories as of 2026-08-01. All platforms listed are verified operational unless marked BETA or ARCHIVED. Scale numbers are from each platform's public-facing data or documentation.
Missing a platform? Open an issue on the minia2a GitHub.