{"provider":{"host":"checksum.openverbs.com","name":"Fletcher-16 / Fletcher-32","score":69.9,"live":true,"checkedAt":"2026-10-27T18:55:12.193Z","uptime72h":100,"lastCheck":{"httpStatus":402,"ms":557,"note":"valid x402 v2 terms"},"endpoints":4,"networks":["eip155:8453"],"cheapestUsd":"0.002","income7dUsd":"21.821","payers7d":28,"transfers7d":1470,"payoutAddressShared":true,"claimed":false,"page":"https://logicnodes.io/observatory/p/checksum.openverbs.com"},"endpoints":[{"url":"https://checksum.openverbs.com/v1/adler32","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Adler-32 checksum (as used by zlib) over the input payload. Faster than CRC-32 but weaker for short inputs. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic."},{"url":"https://checksum.openverbs.com/v1/crc16","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"CRC-16 over the input payload in one of several standard variants (ccitt-false, xmodem, modbus, ibm; default ccitt-false). Returns the checksum as an unsigned integer and 4-digit hex. Non-cryptographic."},{"url":"https://checksum.openverbs.com/v1/crc32","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"CRC-32 (IEEE 802.3 polynomial, as used by zip, gzip and PNG) over the input payload. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic — for error detection only."},{"url":"https://checksum.openverbs.com/v1/fletcher","method":"POST","priceMicroUsd":2000,"networks":["eip155:8453"],"description":"Fletcher checksum over the input payload, in 16-bit (default) or 32-bit width. Returns the checksum as an unsigned integer and hex. Non-cryptographic."}]}