Brave Search API Adds x402 Pay-Per-Call Access in USDC on Base

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Brave has announced that its Search API now accepts x402 payments, letting callers make requests without an account or API key. Each request costs $0.005 paid in USDC on the Base network. The author tested the endpoint with one unpaid request and received an HTTP 402 response carrying a base64-encoded payment challenge in a header. Checking the decoded challenge against the published v2 x402 schema using @x402/core 2.28.0 showed no issues. The comparison with another provider's challenge highlights differences in amounts, timeouts, and header size.

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