Loomal Index vs Fewsats marketplace vs payment plumbing.
Fewsats builds payment infrastructure that lets AI agents pay for digital goods and API access, with x402 and Lightning Network support. Loomal Index is a marketplace — the place where paying agents and priced listings actually meet. Plumbing and venue, not rivals.
Fewsats and Loomal both touch agent payments, which invites the comparison — but they're different kinds of product. Fewsats is infrastructure: SDKs and payment machinery a developer integrates into their own service so agents can pay for digital goods and API access. Loomal Index is a marketplace: a catalog where buyers (agents) find sellers (MCP server and API listings) with prices already attached.
Infrastructure and marketplace sit at different altitudes, and the choice between them is usually not a choice at all.
What Fewsats does
Fewsats provides agent payments infrastructure — the machinery for AI agents to pay for digital goods and API access, supporting both x402 and the Lightning Network. A developer takes that infrastructure and wires it into their own service or agent.
Notably, the Lightning support gives builders a Bitcoin-rails option alongside x402 — a breadth point worth knowing if your payment requirements span ecosystems. For specifics on current capabilities, Fewsats's own documentation is the source of truth.
Infrastructure alone doesn't create a market
Integrating payment infrastructure makes your endpoint able to charge. It doesn't make anyone show up to pay. The seller still faces the marketplace problems: where do paying agents look for tools, how do they learn your price before calling, and how do you appear in that search at all?
Those are venue problems, not plumbing problems — and they're the half of monetization that an SDK, by its nature, leaves to you.
What Loomal Index provides
Loomal is the venue. Sellers list or claim their MCP server or API, set a per-call price from $0.01 (changeable in one field), and become discoverable in a machine-queryable index. Buyers — agents — query that index, get an endpoint plus a price, and pay per call through x402: HTTP 402 challenge, USDC payment, settlement on Base in roughly two seconds, payment cleared before the handler runs, Ed25519 signed receipt on every call, no chargebacks.
x402-compatible payment infrastructure is exactly the kind of machinery that can operate under the hood of flows like this — which is why the marketplace and infrastructure layers complement rather than collide. Loomal's fee: 5% of settled transactions, currently waived.
Choosing your layer
Ask what you're actually short of. If you're building a service and need raw payment machinery embedded in it — or you specifically want Lightning alongside x402 — that's infrastructure territory, where Fewsats plays. If you've built an MCP server or API and your missing piece is paying customers, that's the marketplace, and a Loomal listing is the move.
Many sellers need no extra infrastructure at all: listing on Loomal gives the endpoint its x402 payment flow as part of the package.
The same direction of travel
Both products exist because the same thing is becoming true: agents are turning into paying customers, and HTTP-native payments like x402 are how they'll transact. Infrastructure providers make that possible at the protocol level; Loomal Index makes it practical at the market level — a price, a listing, and a buyer who can find both.
FAQ
Is Loomal Index a Fewsats alternative?
Not in any direct sense. Fewsats is payment infrastructure and SDKs you integrate into your own service; Loomal is the marketplace where agent buyers find priced MCP and API listings. One is plumbing you embed, the other is a venue you list in — different layers of the same stack.
Does Fewsats support x402?
Yes — Fewsats is described as supporting both x402 and the Lightning Network for agent payments. For implementation details and current scope, check Fewsats's own documentation; the agent-payments space is moving quickly as of mid-2026.
If I list on Loomal, do I need separate payment infrastructure?
No. A Loomal listing comes with the x402 flow built in: callers receive an HTTP 402 with your per-call price (minimum $0.01), pay in USDC, and settlement completes on Base in about two seconds before your handler executes. Payment infrastructure products matter when you're building custom payment flows outside the marketplace.
What does Loomal take per transaction?
5% of each settled transaction, and that fee is currently waived. You set the per-call price, you can change it in one field, and every call generates an Ed25519 signed receipt.
Skip the plumbing project.
List your server on Loomal — the x402 payment flow comes with it.