{"resource":"https://otp.openverbs.com/v1/hotp","service":"HOTP (counter-based)","areas":["other"],"answering":true,"http_status":402,"latency_ms":386,"price_usdc":0.004,"buyers_30d":1,"calls_30d":1,"description":"Generate an RFC 4226 counter-based HMAC one-time password from a base32 secret and counter. Configurable digits (6–10, default 6) and algorithm (SHA1/SHA256/SHA512, default SHA1). An invalid base32 secret is a clean 400.","id":"10ad8890dc73","category":"Unclassified","accuracy":null,"tool_calls":null,"checked_day":"2026-10-11","page":"https://velliumandco.com/sellers/10ad8890dc73"}