I monetized my API in 30 minutes with x402 no accounts, no API keys, fast USDC

Echo Sentiment API Pay-per-call sentiment analysis and market intelligence, built on x402. Dual-chain: Base + Solana. USDC. No API keys, no subscriptions — the payment is the authentication. ## Try it live - Free tier: GET - Paid endpoints return HTTP 402` with an x402 payment-required header - …

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