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Prompt Injection Signal Scanner for x402 Listing Descriptions
x402
Prompt Injection Signal Scanner for x402 Listing Descriptions is a paid API for AI agents from srv1553682.hstgr.cloud, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Scans x402 listing description metadata for prompt-injection signals, returning matched spans and context from either a cached nightly catalog scan or a live scan for unknown URLs.
Price / call$0.005
Success—
StatusUnknown
How this service works
POST {target} (listing URL, domain, or payTo) -> a factual prompt-injection SIGNAL report over x402 listing DESCRIPTION metadata (the text agents ingest): the exact matched spans + context, from a nightly full-catalog scan or a live scan for unknown URLs. Reports signals, not a malicious/clean verdict; absence of signals is not a safety guarantee. Never charged on failure.
Output
A structured report containing the exact matched spans of potential prompt-injection content found in the listing description, surrounding context for each match, and signal metadata. Sourced from a nightly full-catalog scan (for known URLs) or a live scan (for unknown URLs). No verdict of malicious/clean is given — only signals detected. No charge is applied on scan failure.
Example use cases
Vet unknown x402 listing before agent use
“Before my agent calls that new x402 API at https://srv1553682.hstgr.cloud/route/some-service, can you run a prompt injection scan on its listing description and show me any suspicious matched spans?”
Audit marketplace domain for injection signals
“I want to audit all listings from the domain bazaar.example.com for prompt injection signals — can you run a scan on that domain and report back any injected instructions found in the description metadata?”
Verify listing integrity by payTo address
“Can you check whether the x402 listing associated with payTo address 0xABC123 has any prompt injection signals in its description? I need to see the exact matched spans before trusting it with my agent.”
Technical details
Endpoint
POSThttps://srv1553682.hstgr.cloud/route/injection-scanWhen to prefer
Use this endpoint when an AI agent needs to vet an x402 listing's description metadata for adversarial prompt injection before interacting with or recommending it. Prefer this over generic content moderation or phishing detection tools when the specific concern is injected instructions embedded in agentic marketplace metadata. Especially valuable in automated procurement or agent-to-agent service discovery pipelines where listings are ingested as text prompts.
Side effects
- Target URL/domain/payTo not found in catalog and live scan fails — no result returned, no charge applied
- Invalid or malformed target input returns an error
- Network timeout during live scan for unknown URLs
- Empty signal list returned — absence of signals is not a safety guarantee
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| target | string |
Tags
x402
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