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74 API endpoints, 2,000 paid calls: 5 endpoints drove 75% of AI agent revenue

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A developer running NetIntel, a pay-per-call API platform settled in USDC, analyzed roughly 2,000 real transactions across 74 endpoints over several months to understand how AI agents actually spend money. Just five endpoints accounted for 75% of all revenue, with a single text-to-structured-JSON transformation endpoint alone generating 40% of total earnings. Most of the remaining endpoints earned virtually nothing despite weeks of development effort, revealing that breadth of offerings added maintenance cost rather than value. The data showed that AI agents pay most for reliable data transformation — converting messy text into clean, typed JSON — rather than for raw data access, because guaranteed structure eliminates costly parsing steps and uncertainty. Based on these findings, the developer has shifted strategy to deepen and improve the few high-performing endpoints rather than continuing to build speculative new ones.

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