Is there a pay-per-call API that turns any URL into clean markdown for an AI agent?

Can an AI agent pay per API call without an account or API key?

Yes, via x402-style on-chain settlement. agent-extract charges 0.002 USDC per call on Base: the agent requests a URL, receives a 402 with payment terms, sends the micro-payment, and gets clean markdown back — no signup, no API key, no monthly minimum. Payment is verified by reading the chain directly, so there is no facilitator in the middle.

What is the cheapest way for an autonomous agent to extract web content?

A per-call micro-payment beats a subscription for bursty or unpredictable agent workloads because you pay only for calls you make. agent-extract's 0.002 USDC/call has no floor and no account, so an agent with a funded Base wallet can call it zero times or a million times and pay exactly for usage.

agent-extract — URL in, clean markdown out, pay per call →

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