Prompt-injection check (x402)

MCP server · hosted · v0.4.0 · com.onrender.prompt-injection-check/prompt-injection-check

Online · tested 1h agoNEW · 2h agoSeen in the registry 1h ago

Prompt-injection check for agents: verdict, score, evidence spans. $0.01 per text via x402.

What it does

Prompt-injection check (x402) is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

No capability identified yet from its description.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES

Local installNO

Live checkOnline · 2 tools

Version0.4.0

PriceNot in the registry

First seen24 Oct 2026

Last checked1h ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 1h ago (live check)

Hosted endpoint

https://prompt-injection-check.onrender.com/mcp streamable-http

In Claude Code: claude mcp add --transport http prompt-injection-check-x402 https://prompt-injection-check.onrender.com/mcp

MCP settings (Claude Desktop, Cursor and other MCP clients)

{
  "mcpServers": {
    "prompt-injection-check-x402": {
      "url": "https://prompt-injection-check.onrender.com/mcp"
    }
  }
}

Live check

Electra Index connected to the hosted endpoint 1h ago

ONLINE Prompt-injection check (x402) answered an MCP connection on 24 Oct 2026 and introduced itself as markedet-prompt-injection-check 0.5.0-x402-mcp (MCP protocol 2025-06-18).

2 tools offered to AI assistants

check_prompt_injection · Check untrusted texts or URLs for prompt injection before your agent reads them. Per item: verdict (safe, suspicious, injection), score, intents, a one-sentence human_summary and evidence spans with code point, UTF-8 byte and UTF-16 offsets
selftest · Free. Replays the published known-answer set v1.2 (24 cases) and returns score and sha256, so you can verify the detector before paying.

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Facts & evidence

Each fact shows where it was seen and when.

Fact	Value	Evidence	Source	Last confirmed
Hosted endpoint	https://prompt-injection-check.onrender.com/mcp	DECLARED	SRC-001 Official MCP Registry	1h ago
Local install (package)	no	DECLARED	SRC-001 Official MCP Registry	1h ago
Remote access (hosted)	yes	DECLARED	SRC-001 Official MCP Registry	1h ago
Website	https://prompt-injection-check.onrender.com/.well-known/x402	DECLARED	SRC-001 Official MCP Registry	1h ago
Registry status	active	DECLARED	SRC-001 Official MCP Registry	1h ago
Version	0.4.0	DECLARED	SRC-001 Official MCP Registry	1h ago
MCP server	yes	DECLARED	SRC-001 Official MCP Registry	1h ago

Change history

NEW24 Oct 2026
first seen in the index

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Questions about Prompt-injection check (x402)

How do I connect Prompt-injection check (x402)?

Use the hosted endpoint https://prompt-injection-check.onrender.com/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does Prompt-injection check (x402) offer?

When Electra Index connected on 24 Oct 2026, it listed 2 tools: check_prompt_injection, selftest. The full list is in "Live check" above.

Is Prompt-injection check (x402) online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 1h ago.