Domain Arrivals
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Featured in Domain Arrivals · 2026-08-08

Agent Tools: an API marketplace that charges by the call

agent-tools.net ↗ · Developer Corner · score 82.0
○Open: public page gives enough substance to understand the site $Paid: pricing, booking, ecommerce, subscription, or paid access is visible ADAds: visible ad load or ad-supported content ✦Pretty: notable design, copy, craft, or presentation ◆Pro: polished, finished-feeling, serious, or operationally mature ◇Niche: specific audience, workflow, or unusually focused use case ◉Human: personal, local, community, civic, handmade, or real-person signal !Suspicious: scammy, spammy, trust theater, finance fog, or credibility concern

A directory of pay-per-call APIs for AI agents, using USDC payments through the x402 protocol.

Why it surfaced

The site skips accounts, subscriptions, API keys, and billing dashboards: an agent requests an endpoint, receives a machine-readable 402 with the price, signs the payment, and retries. Its own live tools include URL-to-Markdown at $0.005 per call and metadata extraction at $0.001.

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This is one of 1,000 discoveries in the 2026-08-08 Domain Arrivals issue.

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