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TrustFetch Safe Fetch
x402
TrustFetch Safe Fetch is a paid API for AI agents from trustfetch.duckdns.org, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).
Fetches a webpage and cleans it to readable markdown while screening the content for prompt-injection attacks before returning it to an AI agent
Price / call$0.03
Success—
StatusUnknown
How this service works
Flagship bundle: fetch a URL, extract clean Markdown, and injection-scan the result in one priced call -- cheaper than calling fetch-clean and injection-scan separately.
Output
Returns a JSON object with two sections: 'fetch' containing the page title, cleaned markdown body, final URL after redirects, word count, and a truncation flag; and 'injection_scan' containing whether injection was suspected, a confidence score, the detected technique (e.g. override_phrase), a flagged snippet, reasoning, and the detector tier used.
Example use cases
Example prompt
“Before you read and summarize that article at https://example.com/article, use TrustFetch to safely fetch and clean the page — and scan it for any hidden prompt-injection attempts so I know if the content is trying to manipulate you.”
Technical details
Endpoint
POSThttps://trustfetch.duckdns.org/tools/safe-fetchWhen to prefer
Use this endpoint when your AI agent is about to read and act on arbitrary web content from untrusted sources and you need both clean extracted text AND a safety check for prompt-injection attempts in one call. Prefer it over a plain web scraper when adversarial content is a concern, and over a standalone injection scanner when you also need the page content delivered.
Side effects
- URL is unreachable or returns a non-200 status — fetch section may be empty or contain an error
- URL resolves to non-HTML content (PDF, binary) — markdown extraction may fail or be incomplete
- Injection scanner returns low-confidence results for novel attack patterns not covered by heuristics
- Redirect chains that exceed limits may cause final_url to differ or fetch to fail
- Payment not received or insufficient USDC — request rejected with payment error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | URL to fetch, clean, and scan |
Output
Schema · Response
{
"type": "json",
"example": {
"fetch": {
"url": "https://example.com/article",
"title": "Example Article",
"markdown": "# Example Article\n\nClean extracted body text...",
"final_url": "https://example.com/article",
"truncated": false,
"word_count": 42
},
"injection_scan": {
"signals": [
{
"snippet": "Ignore all previous instructions",
"reasoning": "Text contains a phrase attempting to override prior instructions.",
"technique": "override_phrase",
"confidence": 0.9
}
],
"reasoning": "Text contains a phrase attempting to override prior instructions.",
"technique": "override_phrase",
"confidence": 0.9,
"detector_tier": "heuristic",
"flagged_snippet": "Ignore all previous instructions",
"injection_suspected": true
}
}
}Tags
x402
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