{"uid":"cap__3HM2AFj5mFUQcPEcfCyq","slug":"fletcher-16-checksum-decimal-via-agentshelf-16afefe7","name":"Fletcher-16 Checksum (Decimal) via AgentShelf","description":"Call when an agent needs a fletcher16 checksum of text as dec. No network and no LLM. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/checksum-fletcher16-dec first.","url":"https://agentshelf.syntexa.ch/v1/checksum-fletcher16-dec?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":"0.006","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":"$0.006/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_zEzZbz0DvvgTx1juK-4VY","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.006","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the Fletcher-16 checksum of a given text string and returns the result as a decimal integer, with no network calls or LLM involved.","exampleAgentPrompt":"Can you compute the Fletcher-16 checksum of the text 'Hello, World!' and give me the result as a decimal number?","exampleUseCases":[{"title":"Integrity check for config file contents","prompt":"I need to verify that my config file text hasn't been corrupted — can you compute the Fletcher-16 checksum of this string as a decimal: 'server=localhost;port=5432;db=myapp'?"},{"title":"Checksum for network packet payload","prompt":"Compute the Fletcher-16 checksum as a decimal for the payload text 'ACK 0x4F 0x2A 0x11' so I can attach it to my packet header for integrity verification."},{"title":"Cross-check data before storage","prompt":"Before I store this record, can you give me the Fletcher-16 checksum in decimal of the string 'user_id=42,name=Alice,role=admin' so I can log it for later validation?"}],"resultDescription":"Returns the Fletcher-16 checksum of the provided text as a decimal integer. The computation is performed locally without any network calls or LLM inference, ensuring deterministic, reproducible results for any given input string.","failureModes":["Missing or empty 'text' field returns a validation error","Text exceeding 100,000 characters is rejected","Missing or invalid 'key' field returns an authentication/authorization error","Payment of exactly $0.006 USDC required via x402 protocol; incorrect payment results in a 402 error","Malformed request body returns a 400 error"],"whenToPreferThis":"Choose this endpoint when you need a fast, deterministic Fletcher-16 checksum of a text string returned as a decimal integer, without any LLM involvement or external network dependencies. Prefer the free sandbox endpoint (POST /v1/sandbox/checksum-fletcher16-dec) for testing; use this paid endpoint in production when sandbox access is unavailable or rate-limited. Use over generic hashing services when Fletcher-16 specifically is required.","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":"fletcher-16-checksum-decimal-via-agentshelf-16afefe7"}