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Fletcher-16 Checksum (Decimal) via AgentShelf
x402
Fletcher-16 Checksum (Decimal) via AgentShelf is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-29).
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.
Price / call$0.006
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Integrity check for config file contents
“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'?”
Checksum for network packet payload
“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.”
Cross-check data before storage
“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?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/checksum-fletcher16-dec?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| key | string | HMAC secret. Required on HMAC SKUs. Omit it for plain digests and checksums. The key is not stored. |
| text | string | 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. |
Tags
x402
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