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AgentShelf ISBN-13 Regex Extractor
x402
AgentShelf ISBN-13 Regex Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-02).
Extracts up to 20 ISBN-13 digit strings from a given text block using regex matching, returning all matches found.
Price / call$0.008
Success—
StatusUnknown
How this service works
Call when an agent needs ISBN-13 digit strings extracted from text, capped at 20 matches. An empty match list is billed. No network. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/regex-isbn first.
Output
A list of up to 20 ISBN-13 digit strings found in the input text, returned as regex matches. An empty list is returned (and still billed) if no ISBNs are found. Results are pure digit strings (13 digits each), extracted without network calls or LLM inference.
Example use cases
Catalog ISBN harvesting
“I have a raw dump of our publisher's catalog page text — can you pull out every ISBN-13 number from it so I can cross-reference them against our database?”
Bibliography reference extraction
“Here's the full text of a research paper's references section. Can you find and list all the ISBN-13 codes mentioned in it?”
Inventory scan for book IDs
“I've pasted in a block of warehouse inventory notes. Please extract all ISBN-13 identifiers from the text so I can look them up in our system.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/regex-isbn?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need fast, deterministic ISBN-13 extraction from text without any network dependency or LLM involvement. Prefer the free sandbox endpoint POST /v1/sandbox/regex-isbn for testing before paying. Choose this over manual parsing or LLM-based extraction when you need consistent regex-based results at low latency and exact cost ($0.008 USDC). Suitable for batch document processing pipelines where ISBN harvesting is a recurring step.
Side effects
- Empty match list returned if no ISBN-13 patterns found in text — still billed at $0.008 USDC
- Text exceeding 100,000 characters will be rejected (input validation error)
- Empty or missing 'text' field causes request failure
- More than 20 matches are capped silently at 20 results
- Malformed ISBN-like strings (e.g. 12-digit or non-ISBN-13 patterns) may not be extracted
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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