Search / xyz.canisell/prescan
protogridR0· no sign-inAgent security pre-checks: prompt-injection scan, MCP tool-poisoning scan, x402 endpoint check.
v0.1.0 · active · website · descriptor JSON · versions
{
"mcpServers": {
"prescan": {
"type": "http",
"url": "https://prescan.canisell.xyz/mcp"
}
}
}claude mcp add --transport http prescan https://prescan.canisell.xyz/mcp[mcp_servers.prescan]
url = "https://prescan.canisell.xyz/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"prescan": {
"type": "remote",
"url": "https://prescan.canisell.xyz/mcp",
"enabled": true
}
}
}{
"mcpServers": {
"prescan": {
"type": "http",
"url": "https://prescan.canisell.xyz/mcp"
}
},
"deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=prescan&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vcHJlc2Nhbi5jYW5pc2VsbC54eXovbWNwIn0%3D"
}{
"servers": {
"prescan": {
"type": "http",
"url": "https://prescan.canisell.xyz/mcp"
}
}
}{
"mcpServers": {
"prescan": {
"httpUrl": "https://prescan.canisell.xyz/mcp"
}
}
}extensions:
"prescan":
enabled: true
name: "prescan"
type: streamable_http
uri: "https://prescan.canisell.xyz/mcp"
timeout: 300
protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28protocol.statelessonly applies to 2026-07-28 serversprotocol.transportstreamable HTTPprotocol.list_ttlonly applies to 2026-07-28 serversauth.prm, auth.as_metadata, auth.cimdno remote uses OAuthauth.secret_in_urlno templated URLtools.descriptionsevery tool has a descriptiontools.description_length1 tools have descriptions over 1,024 characters, which crowds the contexttools.schemasevery tool has an object input schematools.annotations6 of 6 tools declare readOnlyHint or destructiveHinttools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHinttools.token_costabout 1,583 tokens to load every tooltools.api_dumptools are not a one-to-one API dumpstability.changes, stability.rug_pulltool history recorded for 4 of the 7 days neededdeps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI packageNo tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.
Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.
+dns-namespace +website +reachable +uptime-95% +updated-5d-ago -no-repository
Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.
| remote | auth | reachable | uptime 30d | p50 | protocol | last ok |
|---|---|---|---|---|---|---|
https://prescan.canisell.xyz/mcp streamable-http | none | yes | 95% | 746 ms | 2025-11-25 | 2026-11-07 |
aboutread-only | Free. What Prescan does, prices of the paid tools and HTTP endpoints, and links to docs. |
check_x402_endpointread-only | Is this x402 endpoint safe to pay? Fetches its 402 terms with one GET (never pays) and checks: payTo validity and EIP-55 checksum, zero/token-contract/OFAC-sanctioned payTo, asset is canonical USDC for the network, amount vs your budget, price vs the price advertised in its OpenAPI and on x402scan, payTo vs the one x402scan recorded, HTTPS, redirects, resource host, domain age (RDAP), tunnels/shared hosts. Returns go/caution/no_go, the recommended payment option and findings. Costs $0.003 USDC per call via x402 (charged only on success). Without an x402 wallet you get the payment terms and the paid HTTP URL instead. |
list_rulesread-only | Free. The detection categories, rule counts and thresholds used by scan_text and scan_tools. |
preview_scan_textread-only | Free. Prompt-injection pre-check for up to 1000 characters: verdict (safe/suspicious/malicious), score, categories and rule ids. For spans, a sanitized copy, long texts or batches use scan_text (paid). |
scan_textread-only | Prompt-injection pre-check for text your agent is about to read (tool output, web page, email, document, token names/metadata). Deterministic rules, no LLM: instruction override (EN/DE/FR/ES/IT/PT/PL/RU), role hijack, jailbreaks, system-prompt extraction, fake chat delimiters, text addressed to the AI, concealment, data exfiltration (markdown-image beacons, secrets to URLs), tool/fund hijack (shell pipes, transfers, unlimited approvals, skip-confirmation), crypto lures (seed-phrase requests, claim/airdrop links), hidden text (zero-width, Unicode tag and variation-selector smuggling, bidi, homoglyphs, CSS-hidden HTML, ANSI) and encoded payloads (base64/hex/percent decoded and re-scanned). Returns verdict safe/suspicious/malicious, action allow/treat_as_untrusted_data/block, 0-100 score, findings with character spans, risky links, decoded payloads and a sanitized copy. Batch up to 100 texts per call. Costs $0.002 USDC per call via x402 (charged only on success). Without an x402 wallet you get the payment terms and the paid HTTP URL instead. |
scan_toolsread-only | Tool-poisoning scan of MCP tool definitions (a tools/list result) or function schemas before your agent connects or calls them: hidden <IMPORTANT> instructions, cross-tool shadowing, side-channel parameters that ask for file/conversation contents, recipient/payee overrides, instructions hidden in parameter names, defaults or enums, Unicode/ANSI smuggling, duplicate or lookalike tool names. Per-tool verdict and findings with location, plus capability flags (shell, files, network, payments, messaging). Costs $0.002 USDC per call via x402 (charged only on success). Without an x402 wallet you get the payment terms and the paid HTTP URL instead. |
Schemas: list_tools.
{
"name": "xyz.canisell/prescan",
"title": "Prescan",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://prescan.canisell.xyz/mcp",
"type": "streamable-http"
}
],
"version": "0.1.0",
"websiteUrl": "https://prescan.canisell.xyz",
"description": "Agent security pre-checks: prompt-injection scan, MCP tool-poisoning scan, x402 endpoint check."
}