Kotlin & Java Library Sources
OCI · GHCR.IO/AORESHKOV/KOTLIN-LIB-MCP:0.6.0 · SCANNED SEP 20
Kotlin/Java library sources, public API and KDoc from the real Maven sources jar, for AI agents
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security0
- Malware scan not yet available for this package.Unverified
- Known CVEs could not be checked: this artifact ships no SBOM, so there is no dependency list to read. Publishing one would let us assess it.Unverified
- Install-script risk not yet assessed.Unverified
- Dependency health could not be checked: this artifact ships no SBOM, so there is no dependency list to read. Publishing one would let us assess it.Unverified
Provenance & Transparency48
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (Apache-2.0).Pass
- Actively maintained (last published 7 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability84
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1966 tokens (~178/item across 11 items; 11 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management27
- Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 11 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Unverified: 1 category
A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.
How do I install the Kotlin & Java Library Sources MCP server?
Kotlin & Java Library Sources runs locally as a container image, launched with docker run --rm -i ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0. Ready-made configuration for Claude, Cursor, VS Code, Codex and 3 more is on this page, copied from each client's own documentation.
oci · ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0
claude mcp add aoreshkov-kotlin-lib-mcp -- docker run --rm -i ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0
{
"mcpServers": {
"aoreshkov-kotlin-lib-mcp": {
"command": "docker",
"args": [
"run",
"--rm",
"-i",
"ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0"
]
}
}
} {
"servers": {
"aoreshkov-kotlin-lib-mcp": {
"command": "docker",
"args": [
"run",
"--rm",
"-i",
"ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0"
]
}
}
} codex mcp add aoreshkov-kotlin-lib-mcp -- docker run --rm -i ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"aoreshkov-kotlin-lib-mcp": {
"type": "local",
"command": [
"docker",
"run",
"--rm",
"-i",
"ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0"
],
"enabled": true
}
}
} mcp_servers:
aoreshkov-kotlin-lib-mcp:
command: "docker"
args: ["run", "--rm", "-i", "ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0"] {
"McpServers": {
"aoreshkov-kotlin-lib-mcp": {
"Transport": "stdio",
"Command": "docker",
"Arguments": [
"run",
"--rm",
"-i",
"ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0"
]
}
}
} {
"mcpServers": {
"aoreshkov-kotlin-lib-mcp": {
"command": "docker",
"args": [
"run",
"--rm",
"-i",
"ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 20 Sept 26 +4
- Stability: unverified → 0.27 ▲ functional
- 12 Sept 26 43
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Analysed oci/ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | oci |
| Reason | No attestation published |
Background: How many MCP packages publish verified provenance →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
diff_versions Diff versions ~303
Compare the sources of two already-fetched versions of one artifact and report what changed, as unified diff hunks. Call fetch_library for BOTH versions first. Summary counts (filesAdded/filesRemoved/filesModified) describe the whole comparison; 'files' is a bounded page of it ('truncated: true' when more matched — advance 'offset'). Added and removed files report line counts but no hunks; read them with get_source. Narrow a large library with 'path' before paging through it.
| Name | Type | Req | Description |
|---|---|---|---|
| artifact | string | yes | Maven artifact id, e.g. 'ktor-client-core' |
| contextLines | integer | – | Unchanged lines of context around each hunk, 0-10 (default 3) |
| fromVersion | string | yes | Baseline version, e.g. '3.4.0' |
| group | string | yes | Maven group id, e.g. 'io.ktor' |
| maxResults | integer | – | Files per page, 1-50 (default 20) |
| offset | integer | – | Number of changed files to skip for paging (default 0) |
| path | string | – | Only files whose path contains this, e.g. 'io/ktor/client/engine'. Paths have their KMP target directory stripped, so they read like 'commonMain/io/ktor/client/HttpClient.kt'. |
| toVersion | string | yes | Version to compare against the baseline, e.g. '3.5.1' |
| Name | Type | Req | Description |
|---|---|---|---|
| artifact | string | yes | – |
| files | array | – | – |
| filesAdded | integer | – | – |
| filesModified | integer | – | – |
| filesRemoved | integer | – | – |
| fromVersion | string | yes | – |
| group | string | yes | – |
| toVersion | string | yes | – |
| truncated | boolean | – | – |
No examples provided.
fetch_library Fetch library sources ~216
Download, extract and analyze the sources of a Maven-published Kotlin/Java library, warming the local cache. Idempotent — call this once per coordinate before using the other tools. The version may be omitted or set to 'latest' (e.g. 'io.ktor:ktor-client-core' or 'io.ktor:ktor-client-core:latest') to fetch the latest stable release — clients that support elicitation may ask the user to pick a version in that case. Returns a summary (resolved coordinate, KMP targets, file and package counts). Over stdio it also returns 'extractedDir', the local root of the extracted sources: if you have file tools of your own, reading or diffing files under it directly is much cheaper than paging them through get_source.
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact:version', e.g. 'io.ktor:ktor-client-core:3.5.1'. The version may be omitted or 'latest' to resolve the latest stable release. |
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | – | yes | – |
| extractedDir | – | – | – |
| fromCache | boolean | – | – |
| packageCount | integer | – | – |
| resolvedTargets | array | – | – |
| sourceFileCount | integer | – | – |
No examples provided.
get_api_signature Get API signature ~109
Full resolved signature of one declaration by fully-qualified name: type parameters, parameters, return type, supertypes, modifiers. 'bestEffort: true' marks signatures recovered from raw source when type resolution was incomplete.
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact:version', e.g. 'io.ktor:ktor-client-core:3.5.1' |
| fqName | string | yes | Fully-qualified declaration name, e.g. 'io.ktor.client.HttpClient' |
| Name | Type | Req | Description |
|---|---|---|---|
| symbol | – | yes | – |
No examples provided.
get_dependencies Get dependency tree ~177
Dependency tree of a library parsed from its .pom/.module metadata: direct dependencies with scopes, optionally transitive to a bounded depth. Works without fetch_library (reads repository metadata, not sources). The returned tree is bounded by 'maxNodes' as well as by 'depth': when 'truncated' is true the tree was pruned breadth-first (direct dependencies kept, deepest transitives dropped) and 'totalNodes' says how large it really is.
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact:version', e.g. 'io.ktor:ktor-client-core:3.5.1' |
| depth | integer | – | Transitive resolution depth, 1-5 (default 1 = direct only) |
| maxNodes | integer | – | Nodes to return, 1-1000 (default 200) |
| Name | Type | Req | Description |
|---|---|---|---|
| root | – | yes | – |
| totalNodes | integer | – | – |
| truncated | boolean | – | – |
No examples provided.
get_kdoc Get KDoc ~108
KDoc of one declaration by fully-qualified name: summary, description, and structured tags (@param, @return, @throws, @sample, …). 'kdoc: null' means the declaration is undocumented.
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact:version', e.g. 'io.ktor:ktor-client-core:3.5.1' |
| fqName | string | yes | Fully-qualified declaration name, e.g. 'io.ktor.client.HttpClient' |
| Name | Type | Req | Description |
|---|---|---|---|
| fqName | string | yes | – |
| kdoc | – | – | – |
No examples provided.
get_latest_version Get latest version ~122
Resolve the latest version of an artifact from the repository's maven-metadata.xml. Accepts 'group:artifact' or a full 'group:artifact:version' coordinate (the version part is ignored). Returns the latest stable release plus the newest version overall (including pre-releases) and the total version count. Works without fetch_library.
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact' or 'group:artifact:version' |
| includePreReleases | boolean | – | Treat the newest pre-release as 'the latest' (default false) |
| Name | Type | Req | Description |
|---|---|---|---|
| artifact | string | yes | – |
| group | string | yes | – |
| includedPreReleases | boolean | – | – |
| latest | – | – | – |
| latestStable | – | – | – |
| totalVersions | integer | – | – |
No examples provided.
get_source Get source ~222
Raw source of a whole file (by 'path', as returned by other tools, e.g. 'jvm/io/ktor/client/HttpClient.kt') or of a single declaration (by 'fqName'). Provide exactly one of the two. Results are paged ('truncated: true' with a 'totalLines' when the file or declaration is longer than the returned page; advance 'startLine' to read on).
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact:version', e.g. 'io.ktor:ktor-client-core:3.5.1' |
| fqName | string | – | Fully-qualified declaration name to slice out of its file |
| maxLines | integer | – | Page size in lines, 1-5000 (default 500) |
| path | string | – | Source file path relative to the extracted sources root |
| startLine | integer | – | 1-based line to start at, absolute in the file (default: line 1, or the declaration's first line when using 'fqName') |
| Name | Type | Req | Description |
|---|---|---|---|
| content | string | yes | – |
| path | string | yes | – |
| startLine | integer | – | – |
| totalLines | integer | – | – |
| truncated | boolean | – | – |
No examples provided.
list_declarations List declarations ~190
List classes/interfaces/objects/functions/properties of a fetched library with signatures and visibility. Optionally filter by package and visibility (public [default], internal, or all). Results are paged ('truncated: true' with a 'totalCount' when more matched than the returned page; advance 'offset' to fetch the rest).
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact:version', e.g. 'io.ktor:ktor-client-core:3.5.1' |
| maxResults | integer | – | Page size, 1-500 (default 100) |
| offset | integer | – | Number of matching declarations to skip for paging (default 0) |
| package | string | – | Only declarations in this package, e.g. 'io.ktor.client' |
| visibility | string | – | Visibility filter: 'public' (default), 'internal', or 'all' |
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | – | yes | – |
| declarations | array | – | – |
| packageName | – | – | – |
| totalCount | integer | – | – |
| truncated | boolean | – | – |
No examples provided.
list_packages List packages ~138
List the packages discovered in a fetched library's sources, with declaration counts and the KMP targets each package appears in. Results are paged ('truncated: true' with a 'totalCount' when the library has more than the returned page; advance 'offset' to fetch the rest).
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact:version', e.g. 'io.ktor:ktor-client-core:3.5.1' |
| maxResults | integer | – | Page size, 1-1000 (default 200) |
| offset | integer | – | Number of packages to skip for paging (default 0) |
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | – | yes | – |
| packages | array | – | – |
| totalCount | integer | – | – |
| truncated | boolean | – | – |
No examples provided.
list_versions List versions ~149
List the published versions of an artifact from the repository's maven-metadata.xml. Accepts 'group:artifact' or a full 'group:artifact:version' coordinate (the version part is ignored). Works without fetch_library. Newest first and paged ('truncated: true' with a 'totalCount' when the artifact has more than the returned page; advance 'offset' for older versions).
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact' or 'group:artifact:version' |
| maxResults | integer | – | Page size, 1-500 (default 100) |
| offset | integer | – | Number of versions to skip for paging (default 0) |
| Name | Type | Req | Description |
|---|---|---|---|
| artifact | string | yes | – |
| group | string | yes | – |
| totalCount | integer | – | – |
| truncated | boolean | – | – |
| versions | array | – | – |
No examples provided.
search_source Search sources ~142
Search a fetched library's sources line by line and return file:line hits with a snippet. Substring match by default; set 'regex' for Kotlin regex syntax. Results are capped ('truncated: true' when more existed).
| Name | Type | Req | Description |
|---|---|---|---|
| coordinate | string | yes | Maven coordinate 'group:artifact:version', e.g. 'io.ktor:ktor-client-core:3.5.1' |
| maxResults | integer | – | Result cap, 1-200 (default 50) |
| query | string | yes | Substring (default) or regex to search for |
| regex | boolean | – | Treat 'query' as a regular expression (default false) |
| Name | Type | Req | Description |
|---|---|---|---|
| hits | array | – | – |
| query | string | yes | – |
| truncated | boolean | – | – |
No examples provided.
What is the Kotlin & Java Library Sources MCP server?
Kotlin & Java Library Sources is an MCP server listed in the public MCP registry as io.github.aoreshkov/kotlin-lib-mcp. Kotlin/Java library sources, public API and KDoc from the real Maven sources jar, for AI agents. This page covers its container image (ghcr.io/aoreshkov/kotlin-lib-mcp:0.6.0).
Is the Kotlin & Java Library Sources MCP server safe to use?
Kotlin & Java Library Sources scores 47 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Kotlin & Java Library Sources MCP server expose?
Kotlin & Java Library Sources exposes 11 tools: fetch_library, list_packages, list_declarations, get_api_signature, get_kdoc, and 6 more. Their descriptions and schemas cost roughly 1,876 tokens of context every time the server is loaded.
Is the Kotlin & Java Library Sources MCP server still maintained?
Kotlin & Java Library Sources is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Kotlin & Java Library Sources MCP server under?
Kotlin & Java Library Sources declares the Apache-2.0 licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.