The catalog exposes a machine-readable index of services that accept pay-per-request USDC payments and is positioned as a discovery layer for agents and developers integrating the x402 protocol.
Coinbase says Bazaar is in early development, and today, it indexes endpoints that settle through its hosted facilitator.
x402 revives the HTTP 402 “Payment Required” status code and a repeat-request flow in which the client attaches a signed payment payload.
Coinbase’s hosted facilitator verifies and settles the payment, so sellers do not need blockchain infrastructure, and the company states it charges no facilitator fee for USDC on Base.
The whitepaper frames the economics around sub-second confirmations and negligible gas. It compares “x402 (on Base)” with a 200 millisecond settlement path and nominal gas far below one ten-thousandth of a dollar, contrasting card fees and batch settlement.
Bazaar’s list endpoint returns structured JSON for each resource, including accepted asset, network, destination address, and the maximum amount required, expressed in the token’s atomic units.
The example shows a maxAmountRequired of 200 for USDC on Base, equal to $0.000200 at 6-decimal precision, illustrating the system’s intended price granularity for per-call payments.
On the execution path, Base’s Flashblocks feature adds 200-millisecond preconfirmations that shorten the perceived confirmation time for interactive apps.
Once network latency is included, infrastructure providers report typical end-to-end acknowledgments closer to 300–500 ms, while Base’s standard block time remains two seconds.
Under the hood, most current implementations rely on EIP-3009’s authorization-based transfers, which allow a client to sign an authorization that the facilitator submits on-chain.
A simple range illustrates how Bazaar could monetize agentic workloads if technical and regulatory pieces hold.
Using the whitepaper’s minimum price point as a reference, prices between $0.001 and $0.01 per call across 100 to 1,000 listed endpoints and 100,000 to 10 million paid calls per day would imply daily gross payment volume of $100 to $100,000 at the low end of adoption, scaling to $1,000,000 at the high end.
Settlement costs and facilitator fees are the main variables, and Coinbase states the facilitator adds zero fee on Base, leaving nominal gas as the constraint.
If on-chain retail flows normalize in mainstream ecommerce, x402’s pay-per-use pattern can extend from human checkout into machine-to-machine API consumption using the same stablecoin rails.
Open questions remain, Bazaar currently lists services settling in USDC on Base, and Coinbase’s FAQ points to more chains and assets later.
Final adoption will depend on how quickly developers list price-disclosed endpoints and whether Flashblocks-level latency translates to reliable, low-variance payment acknowledgment at production scale.
For now, Bazaar’s discovery API is live, the facilitator is fee-free on Base, and the policy environment is firming around stablecoin settlement.
