{"uid":"cap_LclN0XPlGOGXT_hzA3YY0","slug":"crc16-ccitt-checksum-hex-calculator-2beff3c9","name":"CRC16-CCITT Checksum (Hex) Calculator","description":"Call when an agent needs a crc16-ccitt checksum of text as hex. No network and no LLM. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/checksum-crc16-ccitt-hex first.","url":"https://agentshelf.syntexa.ch/v1/checksum-crc16-ccitt-hex?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"key":{"type":"string","maxLength":512,"minLength":1,"description":"HMAC secret. Required on HMAC SKUs. Omit it for plain digests and checksums. The key is not stored."},"text":{"type":"string","examples":["hello"],"maxLength":100000,"minLength":1,"description":"Message to digest. For raw-hex SKUs this is hex bytes; for utf16 or latin1 SKUs it is decoded with that encoding. Otherwise it is UTF-8 text."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_X6oO3iaQ4EH_klZSK_dAM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the CRC16-CCITT checksum of input text and returns it as a hexadecimal string, with no network or LLM involvement.","exampleAgentPrompt":"Can you compute the CRC16-CCITT checksum in hex for this text: 'Hello, World!'?","exampleUseCases":[{"title":"Firmware update integrity check","prompt":"Calculate the CRC16-CCITT hex checksum for this firmware payload string so I can verify it hasn't been corrupted in transit: 'BOOT_v2.3.1_aarch64_checksum_block'."},{"title":"Protocol frame validation","prompt":"I need the CRC16-CCITT checksum as a hex value for the message 'AT+CMD=READ,REG=0x0A' to append to my serial protocol frame."},{"title":"Data pipeline deduplication","prompt":"Give me the CRC16-CCITT hex checksum for 'user_id=8421&event=purchase&ts=1714900000' so I can use it as a fingerprint to deduplicate events in my pipeline."}],"resultDescription":"Returns the CRC16-CCITT checksum of the provided text as a hexadecimal string (e.g. '29B1'). The computation is fully deterministic, requires no external network calls, and produces no side effects.","failureModes":["Empty or missing text field returns a validation error","Text exceeding 100,000 characters is rejected","Invalid or missing API key returns an authentication error","Malformed request body returns a 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when you need a fast, deterministic CRC16-CCITT hex checksum for data integrity verification, protocol framing, or deduplication, and you want a hosted computation with no dependencies on LLMs or external networks. Prefer the free sandbox endpoint (/v1/sandbox/checksum-crc16-ccitt-hex) for testing; use this paid endpoint for production workloads.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T06:50:13.753Z","isFirstParty":false,"canonicalSlug":"crc16-ccitt-checksum-hex-calculator-2beff3c9"}