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AgentDiet Prompt Shield
x402
AgentDiet Prompt Shield is a paid API for AI agents from agentdiet.dev, paid per call via x402 or MPP, $0.005/call, status unknown (last checked 2026-10-20).
Scans untrusted text (web pages, emails, MCP responses, A2A payloads) for hidden prompt injections and jailbreak attempts, returning sanitized content.
Price / call$0.005
Success—
StatusUnknown
How this service works
Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections and returns sanitized text. (Live x402 v2, IETF MPP & MCP endpoint at https://agentdiet.dev/v1/prompt-shield)
Output
Returns a sanitized version of the input text with prompt injection payloads removed or flagged, along with detection verdicts indicating whether hidden adversarial instructions or jailbreak attempts were found.
Example use cases
Safe web scraping for agent pipelines
“I'm about to feed this scraped article into my research agent — can you scan the raw text first to make sure there are no hidden prompt injection attacks embedded in it?”
Email body safety check before summarization
“Before you summarize this email from an unknown sender, please run the body text through a prompt injection firewall to make sure it's not trying to manipulate you.”
MCP response sanitization before tool use
“My agent just got a response from an external MCP server — can you check that response text for any adversarial instructions or jailbreak payloads before I let the agent act on it?”
Technical details
Endpoint
GEThttps://agentdiet.dev/v1/prompt-shield?utm_source=zero.xyzWhen to prefer
Use this endpoint when your agent pipeline ingests content from untrusted external sources — scraped web pages, user-submitted emails, third-party MCP responses, or A2A payloads — and you need a dedicated firewall layer to detect and strip hidden prompt injections before that content reaches your LLM. Prefer this over generic content filtering when the threat model specifically involves adversarial AI manipulation rather than general content moderation.
Side effects
- Empty or missing 'text' query parameter returns an error
- Extremely large payloads may be rejected or truncated
- Sophisticated obfuscated injections may evade detection
- Non-text or binary content passed as text may cause unexpected behavior
- Network timeout on very large inputs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| textrequired | string | Untrusted text, HTML, or tool output to scan for hidden prompt injection or jailbreak payloads |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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