Loomal Index vs Crossmint where checkout meets catalog.
Crossmint builds wallet and checkout infrastructure so AI agents can buy goods, services, and APIs — with x402 support. Loomal Index is the catalog those agents buy from. Buyer-side rails, seller-side shelf: two layers, one transaction.
Crossmint and Loomal both show up in 'agentic commerce' conversations, but they aren't rivals — they're adjacent layers. Crossmint provides the wallets and checkout capabilities an agent uses to purchase things, including API access via x402. Loomal Index provides the things: a machine-queryable catalog of MCP servers and APIs, each with a per-call price attached.
This page maps where each one starts and stops, and what the combined flow looks like.
What Crossmint does
Crossmint is agent wallet and checkout infrastructure: it equips AI agents with wallets and the ability to complete purchases of goods, services, and APIs, with x402 among its supported payment paths. An agent builder integrates Crossmint's SDKs directly so the agent can hold funds and check out on its own.
That's the demand side of agentic commerce — the part that turns 'the agent decided to buy' into a completed payment.
Checkout needs a shelf
Wallet and checkout infrastructure presumes there's something to buy and the agent knows where it is. For physical goods, that's existing storefronts. For API access and agent tools, the inventory question is wide open: where does an agent look up 'PDF extraction, priced per call, payable right now'?
Crossmint doesn't claim to be that lookup — its SDKs are something a builder integrates, not a public catalog of priced endpoints. The catalog is a separate piece of the puzzle.
What Loomal Index is
Loomal is that catalog for MCP servers and APIs. Each listing carries a description, an endpoint, and a per-call price starting at $0.01 — queryable by machines, not just browsable by humans. The payment mechanics are pure x402: the endpoint answers with HTTP 402 and a price, the agent pays in USDC, the transaction settles on Base in roughly two seconds, and the handler only runs once payment has cleared.
Sellers get Ed25519 signed receipts on every call, no chargebacks, one-field repricing, and a 5% fee on settled transactions that's currently waived.
The combined flow
End to end: an agent equipped with Crossmint-style wallet and checkout capability needs a capability it doesn't have. It queries Loomal Index, finds a server, reads the price. It calls; the 402 comes back; the agent's checkout layer pays it; the server responds. The buyer's infrastructure and the seller's listing each did exactly one job.
Because both sides speak x402, no bilateral integration was needed — the protocol is the handshake.
Who reaches for which
Building an agent that purchases things: wallet and checkout infrastructure like Crossmint's is your integration, and Crossmint's docs are the authority on its current capabilities. Selling calls to a server or API you run: Loomal Index is your listing venue. The honest answer to 'Loomal vs Crossmint' is that a healthy agent economy needs both layers populated — and if you're a seller, the buyers Crossmint equips are precisely who you want finding your listing.
FAQ
Do Loomal and Crossmint compete?
No — they occupy different layers. Crossmint provides wallets and checkout so agents can buy; Loomal Index provides the priced catalog of MCP servers and APIs agents buy from. One transaction typically involves both: Crossmint-style rails on the paying side, a Loomal listing on the receiving side.
Can a Crossmint-powered agent pay for a Loomal listing?
Crossmint's infrastructure includes x402 support per its own description, and every Loomal listing settles via x402 — HTTP 402 price quote, USDC payment, Base settlement in about two seconds. Both sides speaking the same open protocol is what makes the pairing work without custom integration.
As an API seller, should I integrate Crossmint or list on Loomal?
Those aren't substitutes. Crossmint's SDKs serve agent builders on the buying side. To sell per-call access, you list on Loomal, set your price from $0.01, and collect from whatever wallet infrastructure your callers happen to use.
What does selling on Loomal cost?
There's no charge to list; you set a per-call price of at least $0.01 and adjust it in one field whenever you like. Loomal takes 5% of settled transactions, and that fee is currently waived.
Stock the shelf agents buy from.
List your MCP server or API with a per-call price any agent wallet can pay.