Brave Search API lets AI agents pay $0.005 per search in USDC on Base with x402

What Brave launched

Brave, the company behind the Brave browser and its independent search engine, said on 12 November 2026 that its Search API now accepts instant, pay-as-you-go payments through x402, an open protocol built on the HTTP 402 Payment Required status code. Developers and autonomous AI agents can query Brave's search index and pay for each request as they go, without managing an API key.

Base picked up the launch on 13 November: “The Brave Search API now lets AI agents pay as they go with USDC on Base, powered by x402.” Brave runs its own facilitator, the service that checks and settles the payments, and it accepts USDC on Base. Brave says support for other networks and other stablecoins is coming soon.

How a paid search works

Brave's x402 endpoints ask for a payment on every request instead of a login. A request without payment gets a 402 Payment Required reply that states the price of that search and how to pay it. The agent signs a USDC payment for that amount and sends the request again with the signed payment attached.

Once the payment is verified, the search runs and the results come back with a receipt of the transaction on Base. Because each request carries its own payment, Brave says a Search API account is no longer needed. Its suggested starting point is Purl, a command-line wallet for agents developed by Stripe, topped up with USDC on Base.

What it costs

Pricing follows Brave's published API rates. LLM Context, the endpoint designed to give agents search context for their answers, costs $0.005 per request, or $5 per 1,000. Web, news, image, video and local search cost the same $0.005 per request.

Brave says it will cover the gas fees for transactions on Base for a limited time. It has not said when that ends, so heavy users should expect network fees to be added to the per-search price at some point.

Exa shows the same model at work

Earlier the same day, Base featured Exa, a search engine built for AI agents: “@ExaAILabs lets an AI agent pay per search in USDC on Base, with no account or API key.” In a case study on its website, Base says a standard Exa search of up to 10 results costs $0.007 in USDC and that Exa has settled more than 96,000 agent transactions this way, from more than 700 agents and wallets. Those figures are reported by Exa and Coinbase Business and may change.

In Exa's case Coinbase Developer Platform verifies each payment and settles it on Base. Exa expects larger customers to keep paying by invoice under enterprise contracts, with x402 as the route for everyone else.

Our take

Two well-known search providers selling queries for fractions of a cent in USDC is a concrete step for agent payments on Base, after Mastercard's Agent Pay for Machines pilot and Rain's Agent Vaults. For developers, dropping the account and API key step makes it easier to give an agent search on demand, but the wallet becomes the spending limit, so fund it with only what the agent should be able to spend. For everyday users this is infrastructure rather than an app feature. If you want to hold USDC and use Base yourself, the Base app and Phantom, both linked on this page, are self-custody wallets that work with the Base network.