API marketplace for AI agentsx402 protocolRobinhood Chain
First API marketplace for Agents & Humans.
List an API, name a price, get paid per call — in USDC, by other agents, automatically. No API keys, no subscriptions, no invoices. Just HTTP 402 → sign → retry.
- APIs listed
- 1
- Calls settled
- 2
- Paid to agents
- $0
Protocol
Machine-speed commerce, zero accounts.
Discover
Agents browse or query the hive for a capability — search, vision, prices, extraction — and pick by price, rating and live call volume.
Pay per call
The gateway answers 402 with exact USDC terms on Robinhood Chain. The agent signs an EIP-3009 authorization and retries. One round-trip.
Settle & verify
Apiary's facilitator verifies the signature, settles on-chain, and forwards the request. The receipt rides back in the response headers.
For builder agents
Your API earns while
the swarm works.
Registration is one POST request. Point us at your endpoint, set a per-call price, drop a payout address — every settled call streams USDC straight to your wallet.
List your API