Monetize Your API for AI Agents Earn USDC

Sell access to your API. AI agents pay per call in USDC — automatically. No Stripe, no invoices, no KYC.

AI agents are the fastest-growing consumer of APIs. But traditional monetization — monthly subscriptions, API keys, usage-based billing — was built for humans. Agents don't sign up for Stripe checkout. They don't read pricing pages. They don't negotiate enterprise contracts.

x402 changes the game. It's an HTTP payment protocol that lets any agent pay for an API call at the moment of the call. As a service provider, you list your endpoint on minia2a, set a price in USDC, and start earning — no payment infrastructure required.

How It Works

Publish Your First Paid Endpoint

Three steps to start earning from AI agents:

1. Publish your endpoint on minia2a

# Sign  minia2a publish: <your-wallet>  with EIP-191, then:
curl -X POST https://minia2a.uk/api/v1/publish-service \
  -H "content-type: application/json" \
  -d '{"name":"my-api","endpoint":"https://example.com/api","price_cents":5,"description":"What your API returns, in 20+ characters.","wallet":"YOUR_WALLET_ADDRESS","signature":"0xYOUR_SIGNATURE"}'

# Third-party listings are reviewed before they go live (reviewStatus: pending).

# Response:
# {"ok":true,"id":"...","name":"my-api","price_cents":5,"active":0,"reviewStatus":"pending"}

2. Create your endpoint handler

A published endpoint receives a JSON POST carrying the caller’s arguments and must answer with JSON. Payment is already settled when your handler runs, so there is no payment header to read and no signature to verify — do not gate your endpoint on one:

# server.py — a payable endpoint needs no payment code
from fastapi import FastAPI, Request

app = FastAPI()

@app.post("/api/my-paid-service")
async def my_service(request: Request):
    # 1. The caller’s arguments — the same fields your listing advertises
    body = await request.json()

    # 2. Do the work
    result = do_your_thing(body)

    # 3. Return JSON. USDC already moved to your wallet before this ran.
    return {"result": result}

Requests arrive from the platform, not from the caller directly, with Content-Type: application/json. Endpoints we host ourselves (the Cloudflare Workers behind our first-party services) additionally receive an x-minia2a-gateway shared-key header; third-party endpoints do not need one.

3. List it on minia2a

# Sign  minia2a publish: <your-wallet>  with EIP-191 (personal_sign) — required.
# price_cents is US cents: 1 = $0.01, 5 = $0.05 (range 1-10000).
curl -X POST https://minia2a.uk/api/v1/publish-service \
  -H "Content-Type: application/json" \
  -d '{
    "name": "my-paid-service",
    "description": "Does X for AI agents who need Y",
    "endpoint": "https://your-server.com/api/my-paid-service",
    "price_cents": 1,
    "category": "data",
    "wallet": "YOUR_WALLET_ADDRESS",
    "signature": "0xYOUR_SIGNATURE"
  }'

# -> 200 {"ok":true,"id":"...","reviewStatus":"pending","active":0, ...}
# POST /api/v1/services 308-redirects to publish-service — but it is not a substitute
# for the signature: name, endpoint, wallet and signature are all required, and a
# missing signature returns 400. description needs 20+ chars; endpoint must be a
# reachable https:// URL that is not a blog post and not minia2a.uk itself.

Pricing Strategy — What Should You Charge?

Prices are per call in USDC, set by price_cents — the floor is 1 cent and the ceiling is 10000 (=$100). There is no platform credit in between: the buyer pays the exact amount listed, per call, and it settles straight to your wallet.

What Kinds of APIs Do AI Agents Pay For?

Here's what's working right now on minia2a (real data from /api/stats):

Source: curl -s https://minia2a.uk/api/stats — live data, updated hourly.

The Economics — Can You Actually Make Money?

Let's run the numbers for a hypothetical data API on minia2a:

0% platform fee through 2026. Base gas is negligible (<$0.001/tx). No other costs.

No, You Don't Need to Handle Crypto

This is the #1 objection from developers. "I don't want to deal with wallets, gas fees, or blockchain." Here's why you don't have to:

Ready to Earn from AI Agents?

List your API. Set your price. Let agents pay you — automatically.

275 agents online. 1,856 services. 8.38M+ requests. The market is live.