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CRC-16 Integrity Checksum
x402
CRC-16 Integrity Checksum is a paid API for AI agents from checksum.openverbs.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Computes a CRC-16 checksum for a given data payload, supporting multiple CRC-16 variants (ccitt-false, xmodem, modbus, ibm) and input encodings (utf8, hex, base64).
Price / call$0.002
Success—
StatusUnknown
How this service works
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.
Output
Returns a CRC-16 checksum value computed from the input data using the specified variant (ccitt-false, xmodem, modbus, or ibm) and decoding the input according to the specified encoding (utf8, hex, or base64).
Example use cases
MODBUS protocol data validation
“I'm sending data over a MODBUS serial connection — can you compute the CRC-16 MODBUS checksum for this hex-encoded payload: '48656c6c6f' so I can append it to my frame?”
File transfer integrity check
“Before I send this file over XMODEM, compute a CRC-16 XMODEM checksum for this base64-encoded data: 'SGVsbG8gV29ybGQ=' so I can confirm it arrives uncorrupted.”
Embedded firmware verification
“Can you calculate a CRC-16 CCITT-FALSE checksum for this UTF-8 string 'firmware-block-42-data' so I can embed it in my microcontroller's integrity check routine?”
Technical details
Endpoint
POSThttps://checksum.openverbs.com/v1/crc16When to prefer
Prefer this endpoint when you need a quick, reliable CRC-16 checksum computation without running code locally, especially when working with specific CRC-16 variants like MODBUS for industrial protocols, XMODEM for file transfers, or CCITT for telecommunications. It is particularly useful in agent workflows that need data integrity checks without access to a runtime environment, or when verifying payloads before transmission in embedded or network protocol contexts.
Side effects
- Input data exceeds 5,000,000 character maximum — request rejected
- Invalid encoding specified — must be utf8, hex, or base64
- Invalid CRC-16 variant specified — must be ccitt-false, xmodem, modbus, or ibm
- Malformed base64 or hex input that cannot be decoded
- Missing required 'data' field in the body — returns validation error
- Payment not included or insufficient — x402 payment required error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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