Loomal Index vs Coinbase AgentKit the wallet and the marketplace.
Coinbase AgentKit gives an AI agent a wallet so it can hold funds and transact onchain — including x402 payments. Loomal Index is the catalog of things that wallet can pay for. This isn't a versus; it's two halves of the same transaction.
People search 'Loomal vs Coinbase AgentKit' expecting a competitor comparison, so let's be precise upfront: they sit on opposite sides of the same payment. AgentKit equips the buyer; Loomal Index lists the sellers.
Coinbase AgentKit is a developer SDK for giving AI agents their own onchain wallets — holding funds, signing transactions, making x402 payments. Loomal Index is the machine-queryable index of MCP servers and APIs those payments go to. Here's how the pieces fit.
What Coinbase AgentKit is
AgentKit solves the demand-side problem: an autonomous agent needs to hold money and spend it without a human clicking through a checkout. The SDK gives the agent its own onchain wallet, the ability to transact crypto, and support for x402 payments specifically.
If you're building an agent that buys things — data, API calls, tool invocations — AgentKit is one of the established ways to give it spending power.
What a wallet doesn't answer
A funded wallet answers 'how do I pay' but not 'what's worth paying for, where is it, and what does it cost.' An agent holding USDC still needs a way to find a geocoding endpoint, a scraping tool, or a document parser — and to learn the price before committing.
That's the supply-side problem, and it's the one Loomal Index exists for: a queryable catalog where every entry exposes what it does, what it costs per call, and how to pay it.
What Loomal Index provides
Every Loomal listing is x402-ready with a concrete per-call price, minimum $0.01. The agent queries the index, picks a tool, calls the endpoint, receives an HTTP 402 quoting the price, pays in USDC, and the call proceeds — payment settles on Base in roughly two seconds and clears before the handler runs. Each transaction produces an Ed25519 signed receipt, and there are no chargebacks to claw revenue back from the seller.
For sellers, the console handles the listing, the claim flow, and pricing — changeable in one field — with a 5% fee on settled transactions that's currently waived.
One transaction, both tools
Trace a single purchase and the relationship is obvious. An AgentKit-equipped agent holds USDC in its wallet. It queries Loomal Index for a capability, gets back an endpoint and a price, and makes the call. The 402 challenge comes back; the agent's wallet — AgentKit's job — signs and pays; Loomal's listing — the seller's side — collects and serves the response.
Wallet pays, marketplace gets paid. There is no configuration of this transaction where you'd choose between them.
Who needs which
Building an agent that spends? You need wallet infrastructure like AgentKit, and Loomal Index becomes one of the places it can spend. Running an MCP server or API you want agents to pay for? You need a Loomal listing, and AgentKit-style wallets are where your customers' money lives. Building both sides — an agent platform with paid tools — you'll touch both on day one.
FAQ
Is Loomal Index a competitor to Coinbase AgentKit?
No. AgentKit is a wallet SDK for the paying side — it lets an agent hold funds and sign transactions, including x402 payments. Loomal Index is the marketplace side, where agents find MCP servers and APIs to pay. They participate in the same transaction from opposite ends.
Can an agent using AgentKit pay a Loomal listing?
That's the intended shape of the flow. AgentKit supports x402 payments per Coinbase's own description, and every Loomal listing is x402-ready: the agent hits the endpoint, gets an HTTP 402 with the price, pays in USDC, and the call settles on Base in about two seconds.
I run an MCP server — do I need AgentKit?
Not for selling. AgentKit is buyer-side tooling. As a seller you list on Loomal, set a per-call price from $0.01, and collect from whatever wallet stack your callers use — AgentKit among them.
Does Loomal provide agent wallets too?
Loomal's focus is the index and the seller side: listings, claims, pricing, and x402 collection with Ed25519 signed receipts. For giving an agent its own wallet, you'd reach for a wallet SDK such as AgentKit and check Coinbase's docs for current capabilities.
Be what agent wallets spend on.
List your MCP server or API where funded agents are already looking.