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Agentshelf Character 3-gram Counter
x402
Agentshelf Character 3-gram Counter is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-02).
Counts all character-level 3-grams (trigrams) in the provided text and returns their frequencies
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs counts of char 3-grams. No network and no LLM. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/ngram-char-3 first.
Output
A map of every unique 3-character sequence (trigram) found in the input text, with each trigram as a key and its occurrence count as the value. The response is computed locally without network or LLM calls.
Example use cases
NLP feature extraction pipeline
“I need character trigram counts for this product review text to feed into my language model: 'Battery life is excellent but the screen is dim.' Can you extract all char 3-grams and their frequencies?”
Language identification preprocessing
“Analyze the character 3-gram distribution of this sentence to help me identify what language it might be in: 'Der schnelle braune Fuchs springt über den faulen Hund.'”
Plagiarism detection fingerprinting
“Give me a character trigram frequency table for this paragraph so I can compare it against other documents for similarity: 'Machine learning models require large amounts of labeled training data to perform well on downstream tasks.'”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/ngram-char-3?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need exact character-level trigram counts without any external network calls or LLM inference — it is a pure deterministic computation. Prefer this over building your own n-gram logic when you want a reliable, pay-per-call microservice. Try the free sandbox endpoint POST /v1/sandbox/ngram-char-3 first to validate your integration before paying.
Side effects
- Empty or missing 'text' field returns an error — minLength is 1
- Text exceeding 100,000 characters returns a validation error
- Payment of exactly $0.007 USDC required via x402; insufficient payment results in 402 response
- Malformed JSON body returns a 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Input for this SKU. The route description says whether it is plain text, a URL, base64 bytes, or an already-encoded token. |
Tags
x402
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