Monetize Your AI Agent API — Earn USDC from Agent Calls

💰 Why List Your API on an Agent Marketplace?

By 2026, AI agents outnumber human developers as API consumers. Agents need real-time data, computation, and specialized tools — and they're willing to pay for them. The problem? Traditional API monetization (API keys, subscriptions, billing portals) was built for humans, not autonomous agents.

minia2a.uk solves this with x402 — HTTP 402 Payment Required. An agent calls your endpoint, gets back a price, pays in USDC, and retries. Your server verifies the payment on-chain and responds. Zero friction, fully automated.

⚡

1-Command Setup

One curl command lists your API. No onboarding forms, no approval process, no waiting. Your service is discoverable instantly.

🔓

No API Keys, No KYC

Agents pay with USDC, not API keys. You don't manage credentials, rate limits, or user databases. The blockchain is your billing system.

💸

5% Fee, Nothing Upfront

Pay only when you earn. No listing fees, no monthly minimums, no subscription. 5% flat fee per transaction. Typical profit margin: 95%.

🌐

Any Agent, Any Framework

Claude, ChatGPT, LangChain, CrewAI, custom agents — if it speaks HTTP and USDC, it's your customer. No vendor lock-in.

🔗

MCP-Compatible

Your service is automatically available as an MCP tool. Agents using Claude Desktop, Cursor, or any MCP host can discover and pay for your API.

📊

Built-in Discovery

174+ services already listed. 87+ registered agents. 296K+ requests processed. Your API is visible to every agent browsing the marketplace.

🛠️ How It Works — 3 Steps to Monetize

Register Your Endpoint

One curl command. Name, URL, wallet address, price in cents. That's it.

Add x402 Headers

When called without payment, return 402 Payment Required + x402-price header. On retry with TX hash, verify on-chain and fulfill.

Earn USDC Per Call

Payments settle on Base L2 directly to your wallet. ~3¢ gas. Track volume on your dashboard. Cash out anytime.

📡 Register your service — 1 curl, instant listing
$curl -X POST https://minia2a.uk/api/v1/register-simple-H"content-type: application/json"-d'{"name":"my-awesome-api","endpoint":"https://myapi.com/x402","wallet":"0xYourWallet","priceCents":10}'

🔄 Your server: respond 402 when no payment provided
// Node.js / Express exampleapp.get('/x402/my-service', async (req, res) => {
      const txHash = req.headers['x402-transaction-hash'];
      if (!txHash) {
        return res.status(402).set('x402-price', '10').json({error:'payment required'});
      }
      const paid = await verifyOnChain(txHash, '10');
      if (!paid) return res.status(402).json({error:'invalid payment'});
      res.json({data:'here is your paid result'});
    });
  

📊 What You Can Earn

Pricing is entirely up to you. Most services on minia2a charge between 5¢ and 50¢ per call. Here's what that looks like at scale:

5¢

per call

$50/month

at 1,000 calls/month

$500/month

at 10,000 calls/month

$2,375/month

at 50,000 calls/month (95% margin)

💡 Real Example: Gas Price API

The x402-gas endpoint on minia2a charges 5¢ per call and has processed … trial requests. A simple utility — fetch gas prices across 5 chains — that would be trivial to build and list. This is one of 174 services earning from agent calls.

🆚 minia2a vs Traditional API Monetization

Feature	minia2a (x402)	API Keys	Stripe Billing	Web3 (manual)
Setup time	1 curl (~30s)	Days (signup, docs, key gen)	Weeks (integration, compliance)	Weeks (smart contracts)
Agent-compatible	✓ Native	✗ Agents can't sign up	✗ Requires human	✓ Partial
Per-call billing	✓ Native (cents)	✗ Rate limits only	✗ Subscription model	✓ Possible
Settlement speed	~2s (Base L2)	30-90 days (net terms)	2-7 days (payout)	~2s
KYC required	None	Email + sometimes ID	Business verification	None
Platform fee	5%	$0 (but you build everything)	2.9% + 30¢ + $0-300/mo	$0 (gas only)
Discovery / marketplace	✓ Built-in	✗ You do marketing	✗ None	✗ None

🎯 Who Should List on minia2a?

🧩

MCP Server Developers

If you've built an MCP server with useful tools, add x402 headers and earn from every agent call. Your tools are already useful — now they're monetized.

📊

Data API Providers

Crypto prices, weather, news, sports scores, financial data — agents pay for real-time data. List your data endpoint and capture the agent market.

🤖

AI Tool Builders

Built a cool AI tool (text-to-JSON, sentiment analysis, image generation)? Agents need these. List on minia2a and let agents discover and pay for your tool.

🔗

Blockchain / Web3 Services

On-chain data, token security audits, wallet intelligence, ENS resolution — Web3 APIs are a natural fit for agent micropayments. 5¢ to 25¢ per call.

✨ Already have an API? Add x402 in 10 lines of code.

You don't need to rebuild anything. Wrap your existing API endpoint with a 402 check — return the price header if no payment, verify the TX hash if payment present, then serve your normal response. See the quickstart →

❓ FAQ

Do I need to hold crypto to receive payments?

You need a Base L2 wallet address (like any Ethereum address). Payments arrive as USDC. You can swap to fiat via Coinbase, Binance, or any exchange that supports Base USDC.

What if an agent doesn't pay?

The x402 protocol handles this: your server checks the on-chain transaction before responding. If the payment isn't valid, you return 402 again. No payment = no service. It's enforced at the protocol level.

Can I set different prices for different agents?

You control your endpoint. You can set a base price, offer volume discounts, or even make it free for specific callers. The x402 header just tells the agent the price — you decide the logic.

How do agents find my service?

Once listed, your service appears in the minia2a marketplace (174 services and growing), the MCP tool catalog (175+ tools), and the /api/services JSON feed. Agents browse, search, and call directly.

Is there a minimum payout?

No. Payments go directly to your wallet per transaction. There's no balance held by minia2a, no payout threshold, and no withdrawal process. Every call settles on-chain.

Turn Your API Into an Agent-Ready Revenue Stream