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FiatDock Prompt Injection Scanner
x402
FiatDock Prompt Injection Scanner is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.0045/call, status unknown (last checked 2026-10-20).
Scans text for prompt injection patterns that could hijack AI agents, including instruction-override phrasing, role redefinition, credential theft requests, hidden directive tags, and invisible Unicode.
Price / call$0.0045
Success—
StatusUnknown
How this service works
Scan text an agent is about to read (a web page, an email, a tool description, another agent's message) for the shapes that hijack agents: instruction-override phrasing, a redefined system role, requests to move credentials, hidden directive tags, invisible Unicode. Verdict plus every pattern found. Pattern-based; nothing is stored. Pay-per-call via x402. An empty body is answered for the published example text (one harmless sentence); send {"text":"…"} to scan your own.
Output
A verdict (safe/unsafe) plus a list of every detected pattern found in the text — including instruction-override phrasing, redefined system roles, credential-movement requests, hidden directive tags, and invisible Unicode characters. Pattern-based analysis; nothing is stored server-side.
Example use cases
Guard agent before reading scraped web page
“I'm about to have my agent read this scraped webpage to extract key facts — can you first scan the page text for prompt injection, hidden directives, or invisible Unicode that might hijack it?”
Validate incoming agent-to-agent message
“My orchestrator agent just received a message from a third-party sub-agent. Before it acts on it, scan the message for instruction-override phrasing or anything trying to redefine its system role.”
Screen user-submitted email for adversarial content
“A user forwarded this email for my agent to summarize and reply to — scan it first for prompt injection patterns, hidden tags, or credential-harvesting instructions so I know it's safe to hand off.”
Technical details
Endpoint
GEThttps://fiatdock.com/v1/text/prompt-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a fast, stateless, pay-per-call safety check on untrusted text before processing it — especially web pages, emails, third-party tool descriptions, or inter-agent messages. Prefer this over general-purpose LLM-based content moderation when the specific threat model is prompt injection and agent hijacking (instruction overrides, role redefinition, hidden Unicode). Best suited for pre-processing pipelines where no data retention is acceptable and per-call USDC micropayment via x402 is already in use.
Side effects
- Text exceeds 8,000 character limit — truncate or split input before sending
- Empty or missing text parameter returns analysis of the built-in example sentence rather than custom input
- Novel or obfuscated injection patterns not in the rule set may go undetected (pattern-based, not AI-based)
- Payment failure via x402 protocol results in no response
- GET request with malformed query parameter encoding may cause parsing errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
Reviews
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