Get word, character and reading-time counts (JSON body)

Words, characters, sentences, paragraphs, reading and speaking time. No account or API key. Without PAYMENT-SIGNATURE the response is HTTP 402 with an x402 v2 payment challenge; pay and resend the identical request. Input as query string (GET) or JSON body (POST), max 64 KB; the payment is bound to the exact input. Price: 0.002 USDC per call.