Attester Oracle
Verify PyPI and npm packages, symbols, and version diffs against real artifacts. Free, no account.
Should I use this
Quality & Safety
Findings (5)
- HIGHTool poisoning patterns detected
- MEDIUMTool description contains URL to non-standard domainin attester_package_exists
- MEDIUMTool description contains URL to non-standard domainin attester_symbol_exists
- MEDIUMTool description contains URL to non-standard domainin attester_symbol_signature
- MEDIUMTool description contains URL to non-standard domainin attester_version_diff
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"attester-mcp": {
"url": "https://attester.dev/mcp/"
}
}
}Remote endpoints
https://attester.dev/mcp/streamable-httpWhat it can do
Tool inventory
Tools (4)
🟢attester_package_exists(ecosystem, name)
Does this PyPI or npm package name really exist? Deterministic answer from the real published artifact, signed, with typosquat-adjacency flags on misses. Free: 25 calls/day per client IP, shared with the /demo/v1/* HTTP routes, reset 00:00 UTC. Higher volume: paid HTTP routes at https://attester.dev/llms.txt.
Input Schema
{
"type": "object",
"properties": {
"ecosystem": {
"enum": [
"pypi",
"npm"
],
"type": "string"
},
"name": {
"type": "string"
}
},
"required": [
"ecosystem",
"name"
],
"additionalProperties": false
}Output Schema
{
"type": "object",
"additionalProperties": true
}🟢attester_symbol_exists(ecosystem, package, symbol, version)
Does a function, class, or constant exist in this PyPI or npm package? Answer from the indexed artifact, with closest-match suggestions on misses. Free: 25 calls/day per client IP, shared with the /demo/v1/* HTTP routes, reset 00:00 UTC. Higher volume: paid HTTP routes at https://attester.dev/llms.txt.
Input Schema
{
"type": "object",
"properties": {
"ecosystem": {
"enum": [
"pypi",
"npm"
],
"type": "string"
},
"package": {
"type": "string"
},
"symbol": {
"type": "string"
},
"version": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null
}
},
"required": [
"ecosystem",
"package",
"symbol"
],
"additionalProperties": false
}Output Schema
{
"type": "object",
"additionalProperties": true
}🟢attester_symbol_signature(ecosystem, package, symbol, version)
Exact signature, structured params, docstring summary, and deprecation status for one symbol, resolved at a pinned version when given. Free: 25 calls/day per client IP, shared with the /demo/v1/* HTTP routes, reset 00:00 UTC. Higher volume: paid HTTP routes at https://attester.dev/llms.txt.
Input Schema
{
"type": "object",
"properties": {
"ecosystem": {
"enum": [
"pypi",
"npm"
],
"type": "string"
},
"package": {
"type": "string"
},
"symbol": {
"type": "string"
},
"version": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"default": null
}
},
"required": [
"ecosystem",
"package",
"symbol"
],
"additionalProperties": false
}Output Schema
{
"type": "object",
"additionalProperties": true
}🟢attester_version_diff(ecosystem, package, from_version, to_version)
Symbol-level diff between two pinned versions of one package: added, removed, changed signatures, new deprecations, and a breaking/additive/neutral classification. Free: 25 calls/day per client IP, shared with the /demo/v1/* HTTP routes, reset 00:00 UTC. Higher volume: paid HTTP routes at https://attester.dev/llms.txt.
Input Schema
{
"type": "object",
"properties": {
"ecosystem": {
"enum": [
"pypi",
"npm"
],
"type": "string"
},
"package": {
"type": "string"
},
"from_version": {
"type": "string"
},
"to_version": {
"type": "string"
}
},
"required": [
"ecosystem",
"package",
"from_version",
"to_version"
],
"additionalProperties": false
}Output Schema
{
"type": "object",
"additionalProperties": true
}Community
Evidence