prinfer
NPM · PRINFER
TypeScript inferred types, completions and type errors for AI coding agents
Available components
Last scanned (6 hours ago)
Scores higher than 45% of npm servers
Category Developer Tools
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 Security100
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 0 of 25 dependencies flagged as unhealthy. View diagnostics → Pass
Provenance & Transparency13
- Repository check failed: the declared repository URL redirects; it must resolve directly. See how to fix → View diagnostics → Fail
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Maintenance check failed: the publisher has marked this version as deprecated on the registry, telling users to stop installing it. See how to fix → Fail
- Security-disclosure policy not yet verified: we couldn't inspect the source repository.Unverified
Schema Quality & AI Usability63
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1237 tokens (~206/item across 6 items; 6 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 Management77
- Stability observed for 23 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 6 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
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.
- 5 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.
- 3 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.
- 1 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 0
- Security disclosure: fail → unverified ▼ functional
- 30 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.
- 25 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.
- 23 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.
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 5 Nov 2026 · Analysed npm/prinfer@3.4.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 25 packages
| Packages resolved | 25 |
|---|---|
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
annotations ~88
Type annotations in one file that TypeScript would infer anyway (redundant) or that are wider than the inferred type (widening, often an intended contract). Use when reviewing or cleaning up types.
| Name | Type | Req | Description |
|---|---|---|---|
| file | string | yes | TS/JS file: absolute, or relative to the server's cwd |
| project | string | – | tsconfig.json; default: the nearest one above file |
| Name | Type | Req | Description |
|---|---|---|---|
| error | object | – | – |
| ok | boolean | yes | – |
| result | object | – | – |
| version | – | yes | – |
No examples provided.
batch_hover ~192
Up to 100 hovers in one call, across files. Items: {name, line?}, {line, text, occurrence?}, or {line, column}; failures are per item.
| Name | Type | Req | Description |
|---|---|---|---|
| backend | – | – | Default typescript7; retry with typescript6 if it fails or looks wrong |
| file | string | – | Shared file for items without one |
| full | boolean | – | Untruncated types (no "... 12 more ..."), all overloads |
| include_cost | boolean | – | Count type instantiations; typescript6 only |
| include_docs | boolean | – | Also return JSDoc/TSDoc |
| max_chars | integer | – | Text cap per type (default 4000 chars; 0: none) |
| positions | array | yes | 1-100 lookups |
| project | string | – | tsconfig.json; default: the nearest one above file |
| Name | Type | Req | Description |
|---|---|---|---|
| error | object | – | – |
| ok | boolean | yes | – |
| result | object | – | – |
| version | – | yes | – |
No examples provided.
completions ~163
The completions TypeScript offers at a cursor, including string-literal union members. Use to find valid values for an argument, key, or import before writing it. Returns the top 50.
| Name | Type | Req | Description |
|---|---|---|---|
| column | integer | yes | 1-based column; the cursor sits before it, e.g. just inside an opening quote |
| file | string | yes | TS/JS file: absolute, or relative to the server's cwd |
| limit | integer | – | Max entries (default 50) |
| line | integer | yes | 1-based line |
| prefix | string | – | Name prefix, case-insensitive; default: the text left of the cursor; "" lists all |
| project | string | – | tsconfig.json; default: the nearest one above file |
| Name | Type | Req | Description |
|---|---|---|---|
| error | object | – | – |
| ok | boolean | yes | – |
| result | object | – | – |
| version | – | yes | – |
No examples provided.
diagnostics ~116
Check one file for type errors without running tsc on the whole project. Call it on each file you edit; the edit is done when none reports an error.
| Name | Type | Req | Description |
|---|---|---|---|
| backend | – | – | Default typescript7; retry with typescript6 if it fails or looks wrong |
| file | string | yes | TS/JS file: absolute, or relative to the server's cwd |
| include_suggestions | boolean | – | Also report suggestions such as unused variables |
| project | string | – | tsconfig.json; default: the nearest one above file |
| Name | Type | Req | Description |
|---|---|---|---|
| error | object | – | – |
| ok | boolean | yes | – |
| result | object | – | – |
| version | – | yes | – |
No examples provided.
hover ~257
The type at a token on a line, like an editor hover; generic calls show their instantiated types. Use when hover_by_name can't name the token: callback parameters, expressions, repeated names.
| Name | Type | Req | Description |
|---|---|---|---|
| backend | – | – | Default typescript7; retry with typescript6 if it fails or looks wrong |
| column | integer | – | 1-based column; alternative to text |
| file | string | yes | TS/JS file: absolute, or relative to the server's cwd |
| full | boolean | – | Untruncated types (no "... 12 more ..."), all overloads |
| include_cost | boolean | – | Count type instantiations; typescript6 only |
| include_docs | boolean | – | Also return JSDoc/TSDoc |
| line | integer | yes | 1-based line |
| max_chars | integer | – | Text cap per type (default 4000 chars; 0: none) |
| occurrence | integer | – | Which match of text on the line (default 1) |
| project | string | – | tsconfig.json; default: the nearest one above file |
| text | string | – | Token copied from the line, e.g. "useState"; whole identifiers match first. Instead of column |
| Name | Type | Req | Description |
|---|---|---|---|
| error | object | – | – |
| ok | boolean | yes | – |
| result | object | – | – |
| version | – | yes | – |
No examples provided.
hover_by_name ~226
The type TypeScript infers for a named variable, function, parameter, property, or type. Use before writing an annotation, when unsure what a generic or call resolves to, or instead of reading .d.ts files.
| Name | Type | Req | Description |
|---|---|---|---|
| backend | – | – | Default typescript7; retry with typescript6 if it fails or looks wrong |
| file | string | yes | TS/JS file: absolute, or relative to the server's cwd |
| full | boolean | – | Untruncated types (no "... 12 more ..."), all overloads |
| include_cost | boolean | – | Count type instantiations; typescript6 only |
| include_docs | boolean | – | Also return JSDoc/TSDoc |
| line | integer | – | 1-based line, to pick among repeated names |
| max_chars | integer | – | Text cap per type (default 4000 chars; 0: none) |
| name | string | yes | Symbol name, e.g. "createHandler" |
| project | string | – | tsconfig.json; default: the nearest one above file |
| Name | Type | Req | Description |
|---|---|---|---|
| error | object | – | – |
| ok | boolean | yes | – |
| result | object | – | – |
| version | – | yes | – |
No examples provided.
How do I install the prinfer MCP server?
prinfer runs locally as an npm package, launched with npx -y prinfer. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · prinfer
claude mcp add clockblocker-prinfer -- npx -y prinfer
What is the prinfer MCP server?
prinfer is an MCP server listed in the public MCP registry as io.github.clockblocker/prinfer. TypeScript inferred types, completions and type errors for AI coding agents. This page covers its npm package (prinfer).
Is the prinfer MCP server safe to use?
prinfer scores 73 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. It declares no install or post-install scripts. 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 prinfer MCP server expose?
prinfer exposes 6 tools: hover_by_name, hover, batch_hover, completions, diagnostics, annotations. Their descriptions and schemas cost roughly 1,042 tokens of context every time the server is loaded.
Is the prinfer MCP server still maintained?
prinfer is still listed as active in the MCP registry. We last reached this channel on 5 November 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 prinfer MCP server under?
prinfer declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.