Search / io.github.jamesdfinance-dev/lazaretto
protogridR0· no sign-inFree lockfile malware check plus paid behavioral scan of packages, agent skills and MCP tools.
v1.3.0 · active · repository · website · descriptor JSON · versions
{
"mcpServers": {
"lazaretto": {
"type": "http",
"url": "https://lazaretto.dev/mcp",
"headers": {
"X-API-Key": "${X_API_KEY}"
}
}
}
}claude mcp add --transport http lazaretto https://lazaretto.dev/mcp --header "X-API-Key: ${X_API_KEY}"[mcp_servers.lazaretto]
url = "https://lazaretto.dev/mcp"
env_http_headers = { "X-API-Key" = "X_API_KEY" }
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"lazaretto": {
"type": "remote",
"url": "https://lazaretto.dev/mcp",
"enabled": true,
"headers": {
"X-API-Key": "{env:X_API_KEY}"
}
}
}
}{
"mcpServers": {
"lazaretto": {
"type": "http",
"url": "https://lazaretto.dev/mcp",
"headers": {
"X-API-Key": "${X_API_KEY}"
}
}
},
"deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=lazaretto&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vbGF6YXJldHRvLmRldi9tY3AiLCJoZWFkZXJzIjp7IlgtQVBJLUtleSI6IiR7WF9BUElfS0VZfSJ9fQ%3D%3D"
}{
"servers": {
"lazaretto": {
"type": "http",
"url": "https://lazaretto.dev/mcp",
"headers": {
"X-API-Key": "${X_API_KEY}"
}
}
}
}{
"mcpServers": {
"lazaretto": {
"httpUrl": "https://lazaretto.dev/mcp",
"headers": {
"X-API-Key": "${X_API_KEY}"
}
}
}
}extensions:
"lazaretto":
enabled: true
name: "lazaretto"
type: streamable_http
uri: "https://lazaretto.dev/mcp"
headers:
"X-API-Key": "${X_API_KEY}"
timeout: 300
Placeholders to fill from your own secret store: ${X_API_KEY}. The registry never accepts secret values.
protocol.modernnewest supported version is 2025-06-18; 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_length2 tools have descriptions over 1,024 characters, which crowds the contexttools.schemasevery tool has an object input schematools.annotations9 of 9 tools declare readOnlyHint or destructiveHinttools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHinttools.token_costabout 2,805 tokens to load every tooltools.api_dumptools are not a one-to-one API dumpstability.changesno tool changes in 30 daysstability.rug_pullno tool changed its meaning under the same namedeps.known_vulnsno known advisory in 98 resolved packagesdeps.mcp_sdk_version@modelcontextprotocol/sdk 1.30.1 has 1 known advisory (GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.31.0 or laterdeps.resolvable[email protected] resolved: 98 packagesNo 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.
+repository +namespace-matches-repo +website +reachable +uptime-100% +updated-27d-ago
Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.
[email protected] npm97 dependencies, resolved · MCP SDK @modelcontextprotocol/sdk 1.30.1 · advisories checked 2026-10-19
| advisory | severity | package | fixed in |
|---|---|---|---|
| GHSA-6qxp-vccf-f47hMCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server | high | @modelcontextprotocol/[email protected]MCP SDK, direct | fixed in 1.31.0 |
Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.
| remote | auth | reachable | uptime 30d | p50 | protocol | last ok |
|---|---|---|---|---|---|---|
https://lazaretto.dev/mcp streamable-http | none | yes | 100% | 299 ms | 2025-06-18 | 2026-10-20 |
| package | registry | version | runtime | secrets |
|---|---|---|---|---|
lazaretto-mcp | npm | 0.6.0 | npx | LAZARETTO_API_KEY |
check_lockfileread-only | Check EXACTLY-PINNED npm dependencies against published malicious-package advisories (OSV/OpenSSF). Free, anonymous, one call for the whole set. Give EITHER `lockfile`, the full text of a package-lock.json, yarn.lock or pnpm-lock.yaml, OR `packages`, a list of "name@version" strings, which is the one to reach for when you only care about a few dependencies or when an 800-package tree would not fit in your context. Give one or the other, never both. Only exact versions can be answered: a range like ^5.0.0 has no definitive answer because a compromised release usually sits between clean ones. Fail-closed: anything that could not be checked is returned in `unverified`, so an empty `malicious` list is an all-clear only when `unverified` is empty too AND `truncated` is false. `truncated: true` means the lockfile ran past the per-request package limit and the packages past it went into NEITHER list: they were never looked at, `checked` counts only the ones that were, and the rest are unchecked rather than clean. When that happens, send the remainder as `packages` (name@version strings) in a second call, or split the lockfile by workspace, before telling anyone the tree is clean. |
check_mcp_tools | Check tool definitions you ALREADY HOLD, with no network call to anyone. Most MCP servers run locally over stdio and have no endpoint that can be reached, so this is the only way to check them, and your client already read their tool list at startup. Paste that JSON: a whole tools/list response, a {"tools":[...]} object, or a bare array. Analyzes the same text as scan_mcp_server and applies the same rules, so a payload cannot be caught over the wire and missed here. Detects tool poisoning (hidden directive blocks, orders pointing the agent at private keys or an agent config file), parameters whose real purpose is to carry secrets or your conversation out, standing orders about ANOTHER server's tools, and invisible-unicode payloads. Metered like scan_artifact. |
find_attestationread-only | Ask whether anyone has already attested an artifact, BEFORE you install it or pay to scan it. Free and anonymous. Give a package identity like "[email protected]", an MCP server endpoint URL, or a sha256 content hash. Returns the signed verdict if one exists, which you can verify offline against https://lazaretto.dev/.well-known/jwks.json, plus freshness: whether the corpus has since contradicted it and whether it was attested under an older rules version. A miss is not a verdict, it only means nobody has scanned this yet. When nobody has attested an npm package identity, the answer falls back to a free identity check against published advisories: `answer: "identity_check"` with an `identity_check` object, and `found` still false, because an identity check is unsigned, looks at the identity rather than the code, and absence from the corpus is not a verdict. `identity_check.listed_as_malware: true` comes back as an error result, so a published malware version cannot be read as "nothing found"; `null` there means the corpus could not be consulted, which is unchecked and never clear. |
get_free_key | Get a free developer key for the metered tools on this server, without leaving this session. No payment, no account, no card. The key holds a small daily allowance that refills every day, and one credit is consumed per verdict, nothing on an error. Present it as the X-API-Key header on this MCP connection, or hand it to whoever configures your client. Throttled exactly as the equivalent HTTP endpoint is: one key per source per window, so calling this again shortly after will be refused rather than minting a second key. Store the key when you get it: it is shown once and cannot be recovered. |
known_bad_lookupread-only | Check a SHA-256 against Lazaretto's known-bad indicator set (refreshed daily from abuse.ch). Free and anonymous. A miss only means this exact hash is not in the indicator set; it is not a clean verdict on the artifact. |
scan_artifact | Deterministically analyze a package, repo, skill, or file for malicious behavior (credential theft, data exfiltration, obfuscation, prompt injection aimed at the agent, install scripts) and return a verdict (malicious, flagged, clear, error) with the exact evidence and a hash of what was scanned. Metered: present an X-API-Key holding credits. If you hold a wallet instead of an account, pay per call over x402 at POST https://lazaretto.dev/v1/scan ($0.03 USDC on Base, no signup). A free key with a daily allowance is available at POST https://lazaretto.dev/v1/trial. For checks that are always free, use check_lockfile or known_bad_lookup. |
scan_lockfile_deep | Behaviorally scan the exactly-pinned dependencies in a lockfile, not just their identities: reads the code of each package and screens for credential theft, exfiltration, obfuscation, prompt injection and install-time droppers. Each result carries a verdict, a risk level, the ids of the rules that fired and a risk summary. It does not carry file-and-line evidence: for that, run scan_artifact on the package you want to look at. This is the paid counterpart to check_lockfile, which only matches names and versions against advisories. Metered: one credit per package that returns a verdict, nothing for one that errors. Capped at 25 packages per call, in lockfile order, so calling it again with the same lockfile rescans the same first 25. To continue, pass the not_scanned.packages list from the result (name@version strings) as `packages` instead of `lockfile`. Use it before installing a tree you have not vetted. |
scan_mcp_server | Check an MCP server BEFORE you connect to it. Asks the server to introduce itself and list its tools, then analyzes the text it hands an agent: tool names, descriptions, parameter schemas and server instructions. Catches tool poisoning (hidden directives that point the agent at private keys or at an agent config file), parameters whose real purpose is to carry secrets or your conversation out, standing orders about ANOTHER server's tools (cross-server shadowing), and invisible-unicode payloads. Returns a verdict with the exact tool and line as evidence, plus a hash of what was advertised, so a server that changes its tools later does not inherit the old verdict. Metered like scan_artifact: an X-API-Key with credits, or pay per call over x402 at POST https://lazaretto.dev/v1/scan with target type mcp_server ($0.03 USDC on Base, no signup). |
verify_attestationread-only | Verify a Lazaretto scan attestation that another agent (or a README, or a lockfile) handed you, WITHOUT re-scanning or paying. Free and anonymous. Returns whether the signature is valid and Lazaretto's, the attested claims (verdict, risk, and the subject the verdict is about), and a `contradicted` flag if a previously-clear subject is now known-bad. You MUST still confirm the artifact you are about to run matches `claims.sub` (its sha256, or its package identity). |
Schemas: list_tools.
{
"name": "io.github.jamesdfinance-dev/lazaretto",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://lazaretto.dev/mcp",
"type": "streamable-http",
"headers": [
{
"name": "X-API-Key",
"isSecret": true,
"description": "Optional. A Lazaretto key holding scan credits, used only by the paid tools. The free tools work without it. Buy credits at https://lazaretto.dev/buy."
}
]
}
],
"version": "1.3.0",
"packages": [
{
"version": "0.6.0",
"transport": {
"type": "stdio"
},
"identifier": "lazaretto-mcp",
"runtimeHint": "npx",
"registryType": "npm",
"environmentVariables": [
{
"name": "LAZARETTO_API_KEY",
"isSecret": true,
"description": "Optional. A Lazaretto key holding scan credits, used only by the paid tools. The free tools work without it. Buy credits at https://lazaretto.dev/buy."
}
]
}
],
"repository": {
"url": "https://github.com/jamesdfinance-dev/lazaretto-mcp",
"source": "github"
},
"websiteUrl": "https://lazaretto.dev",
"description": "Free lockfile malware check plus paid behavioral scan of packages, agent skills and MCP tools."
}