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Prompt Injection Check
x402
Prompt Injection Check is a paid API for AI agents from agent-data.centorprat.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-30).
Analyzes text or HTML content for hidden prompt-injection instructions and malicious override attempts, returning a verdict, risk score, and categorized findings
Price / call$0.005
Success—
StatusUnknown
How this service works
Pay-per-call data and tools for AI agents, $0.002-0.01 per call in USDC via x402 (Base, Polygon or Solana), no account or API key; MAX tiers ($0.05-0.25) run deeper jobs. Agent toolkit: web search, search + read top pages, any page as clean markdown with a prompt-injection check, which-x402-API-to-call recommender, seller check. Data: Google Maps places with contacts, YouTube video data and transcripts, job listings (Indeed, LinkedIn, 13 boards), Google Ads Transparency, TikTok comments, Pinterest, Airbnb, Redfin, AliExpress, app stores, live sports, website and SEO checks, Shopify store tech stacks, and onchain token / address risk checks.
Output
A JSON object with a 'verdict' field (e.g. 'malicious', 'safe'), a 'riskScore' integer from 0–100, and a 'findings' array listing each detected threat by type (e.g. 'instruction-override') and its weight/severity score.
Example use cases
Safe web scraping pipeline guard
“I'm about to feed you the text from a third-party website. Before you do anything with it, check it for hidden prompt-injection instructions and tell me the verdict and risk score so I know it's safe to process.”
Agentic marketplace seller trust check
“Before my agent responds to this seller's product description, scan the text for any hidden AI override instructions or injection attempts — I want the verdict and a list of any suspicious findings.”
LLM input sanitization before summarization
“I just scraped this article's HTML to summarize it. Can you first run a prompt-injection check on both the raw HTML and the extracted text, and only proceed with the summary if the verdict comes back clean?”
Technical details
Endpoint
POSThttps://agent-data.centorprat.workers.dev/agent/injection-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent is about to ingest untrusted external content — scraped web pages, user-submitted text, seller descriptions, or LLM-chained outputs — and you need a fast, per-call safety gate to detect hidden prompt-injection or instruction-override attempts before they reach your model. Prefer it over generic content-moderation APIs because it is purpose-built for adversarial AI instruction detection, accepts both raw HTML and extracted text simultaneously, and returns a structured risk score plus categorized findings rather than a binary flag.
Side effects
- Text exceeds 200,000 character limit — truncation or rejection
- HTML and text mismatch may reduce detection accuracy
- False negatives on novel or obfuscated injection techniques
- Payment failure via x402 prevents call execution
- Non-text or binary content passed as input may produce unreliable results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| html | string | Optional raw HTML of the same content, to find hidden instructions |
| text | string | The text to check (up to 200,000 characters) |
Output
Schema · Response
{
"type": "json",
"example": {
"verdict": "malicious",
"findings": [
{
"type": "instruction-override",
"weight": 45
}
],
"riskScore": 90
}
}Tags
x402
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