Brave Search API Integrates x402 Protocol for Agentic Payments

Brave has integrated the open x402 payment protocol into its Brave Search API, enabling a pay-as-you-go model for developers and autonomous AI agents, as Brave first reported. According to a Brave blog post, the system allows agents to programmatically query Brave's independent search index and settle requests in real time, removing the requirement for traditional API key management or the creation of a formal account.

Under the x402 framework, API endpoints require payment for every individual request rather than standard authentication. Brave reports that if a request is sent without payment, it triggers an HTTP 402 Payment Required response detailing the cost and payment instructions. The agent then signs a payment in USDC via the Base blockchain and retries the request. Once verified, the search is executed and a transaction receipt is provided.

Brave is currently operating its own facilitator to accept USDC on the Base network, though the company noted that support for other stablecoins and networks is coming. For ease of integration, Brave suggests using Purl Wallet, a CLI wallet developed by Stripe.

Pricing for the service aligns with Brave's published API rates. Both the LLM Context—designed specifically for agent grounding—and general web, news, image, video, and local endpoints are priced at $0.005 per request, or $5 per 1,000 requests. Brave noted that it will cover gas fees for Base blockchain transactions for a limited period.