A new kind of customer is shopping.
AI agents now buy data, tools and compute on their own. They pay per request in USDC, around the clock, without accounts or cards.
Get paid by machines.
AI agents now buy data, tools and compute on their own, and they pay per request in USDC. We make your API one they can find and pay, and we build agents that earn for you.
Most APIs are invisible to them.
An agent arrives, finds no price and no way to pay, and moves on. No error, no lead, no sale. You never see it happen.
We teach your API to say 402.
HTTP 402 Payment Required, with a price, a network and a wallet. The agent reads it, signs and pays. That is x402.
Then we put it on every map agents read.
llms.txt, an agent card, OpenAPI, the x402 Bazaar and the MCP registries. Agents choose what they can find.
And the payments start to land.
USDC settles on Base in seconds, straight to your wallet. We never hold your funds or keys.
Your API could be earning tonight.
Start with the free check. It takes five seconds and shows exactly what agents see.
Is your API legal tender for agents?
Paste an endpoint. We call it the way an agent would and inspect the 402 response, the payment terms and whether agents can find you. About five seconds, free.
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Want it fixed? The Fix Report gives you every fix with code in 24 hours. The Paywall Sprint does the work for you.
Agents can use the check too: GET https://ouro.oroboros-design.com/api/check?url=… returns JSON. Free, up to 30 checks per hour.
108,185paid endpoints are listed in the Coinbase x402 Bazaar today.Source: Coinbase CDP discovery API, Nov 2026
~4,000wallets make up about 90 % of what agents spend. The early sellers who get found take most of it.Source: Visa and Artemis, x402 volume analysis
Secondsfrom request to settled USDC on Base. No accounts, no cards, no invoices for the agent.x402 v2 with the CDP facilitator
Fixed prices, printed on the note.
Pick a note and pay online. Card, SEPA or Apple Pay with an invoice, or USDC on Base on request. Business customers only, worldwide.
OA 0149 FX24 hours
€149
x402 Fix Report
Why agents skip or fail on your endpoint, and the exact fixes.
Prioritised findings, copy-paste code, your discovery text rewritten.
Back within 24 hoursBuy for €149
OA 0490 DP5 working days
€490
Agent Discovery Pack
Agents and LLMs can find, understand and call your API.
llms.txt, agent card, OpenAPI, x402 Bazaar metadata, MCP registry listing.
Live in 5 working daysBuy for €490
OA 0690 PA3 working days
€690per contract
Pre-Audit Sprint
Catch the cheap bugs before you pay for a formal audit.
AI-assisted review of up to 500 lines, a human second look, written findings.
Findings in 3 working daysBuy for €690
OA 1490 PW72 hours
€1,490
x402 Paywall Sprint
One API route paid per request in USDC, straight to your wallet.
Test on Base Sepolia, go live on Base, discovery metadata, handover. Full refund if it does not work on the test network.
72 hours after accessBuy for €1,490
OA 3200 LS72 hours
€3,200
Launch Site
A clear website for your Web3, AI or API product, readable by people and agents.
Positioning, docs and pricing sections, llms.txt, your domain and hosting. Half now, half at handover.
72 hours after the briefPay deposit €1,600
OA 6500 AG2–3 weeks
€6,500
Custom Agent PoC
A working AI agent for your workflow: research, monitoring, reporting or support, with x402 or Stripe payments if you want them.
Scope in writing, agent with tests, dashboard or chat, handover with docs. Half now, half at acceptance.
Working in 2–3 weeksPay deposit €3,250
Agents that keep earning
Monthly, cancel any month.
OA 0290 SCmonthly
€290/ month
Support & Community Agent
Answers your users in Discord, Telegram or your docs, and hands hard cases to your team.
€1,500 one-time setup. Your tone, your docs, your escalation rules.
Cancel monthlyStart for €290 / month
OA 0900 OBmonthly
€900/ month
Outbound Engine
Angel finds the companies that need your product and writes to them from your mailboxes.
€500 one-time setup. Only where B2B outreach is lawful, with a clear opt-out in every message.
Cancel monthlyStart for €900 / month
Prices in euros. No VAT is charged (small business, Section 19 German VAT Act). Stripe sends the receipt and invoice.
How a sprint settles.
Every crypto step happens on a test network first. You see a real test transaction before anything touches mainnet.
You pay and share access
Repo, staging URL or API docs. Read access is enough to start.
Angel builds
On a branch, on Base Sepolia, with tests.
You see it work
A real test payment, with its transaction hash.
We go live together
Your wallet, your keys, your OK. USDC lands with you.
Handover
Code, docs and a short video. Questions answered for 14 days.
Signed by two.
Every banknote carries the signatures of the people who answer for it. Ours does too, and we say plainly which one is an AI.
Angel
AI operator
Angel answers your messages, runs the checks, writes the first version of code and reports, and keeps every project moving. Messages from Angel say that they come from an AI.
Daouda Ndiaye
Founder, Oroboros Design, Cologne
Reviews and signs off every delivery, joins calls when you want a person, and is responsible for everything Ouro Agents does.
Questions teams ask.
Short answers. Ask Angel anything else.
Do you hold our funds or keys?
No. You create and keep your wallet keys. Payments go straight from agents to your address. We only ever see public addresses.
Is any of this investment advice?
No. We build software and websites. We do not advise on which crypto-assets to buy or hold, and we do not trade for anyone.
What if the sprint does not work?
If we cannot get your endpoint working on the test network, you get your money back in full.
Which chains and tokens?
USDC on Base by default. Solana, Polygon, Arbitrum and others on request. Prices are in euros; agents pay you in USDC.
Do you work with teams outside Europe?
Yes, worldwide, business customers only. We work in English, French and German.
How do you contact companies?
Only where business email outreach is lawful, always with a clear sender, a one-click opt-out and a note that Angel is an AI.
Tell us what you are building.
Angel replies within one working day with a fixed price or a question. If you prefer a call, say so.
Or write to ouro@oroboros-design.com