# Nlrb (npm · @pipeworx/mcp-nlrb)

NLRB MCP — US National Labor Relations Board case search: unfair labor practice (C) charges and…

- Trust score: 81/100 (high trust)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `gateway.pipeworx.io`: 77/100, [markdown](https://verifymcp.io/servers/pipeworx-io-nlrb/nlrb-mcp.md), [page](https://verifymcp.io/servers/pipeworx-io-nlrb/nlrb-mcp)
- npm · `@pipeworx/mcp-nlrb`: 81/100 (this document), [markdown](https://verifymcp.io/servers/pipeworx-io-nlrb/pipeworx-mcp-nlrb.md), [page](https://verifymcp.io/servers/pipeworx-io-nlrb/pipeworx-mcp-nlrb)

## Channel facts

- Registry: `npm`
- Package: `@pipeworx/mcp-nlrb`
- Version: `0.2.1`
- Transport: `stdio`

## Trust breakdown

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. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - No production dependencies, so there is no dependency health to assess.
- **Provenance & Transparency**: 97/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to pipeworx-io/mcp-nlrb).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 60/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 906 tokens (~302/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Nlrb MCP server?

Nlrb runs locally as an npm package, launched with npx -y @pipeworx/mcp-nlrb. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add pipeworx-io-nlrb -- npx -y @pipeworx/mcp-nlrb
```

### Cursor

```json
{
  "mcpServers": {
    "pipeworx-io-nlrb": {
      "command": "npx",
      "args": [
        "-y",
        "@pipeworx/mcp-nlrb"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "pipeworx-io-nlrb": {
      "command": "npx",
      "args": [
        "-y",
        "@pipeworx/mcp-nlrb"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add pipeworx-io-nlrb -- npx -y @pipeworx/mcp-nlrb
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "pipeworx-io-nlrb": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@pipeworx/mcp-nlrb"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add pipeworx-io-nlrb --command npx --arg -y --arg @pipeworx/mcp-nlrb
```

### Hermes

```yaml
mcp_servers:
  pipeworx-io-nlrb:
    command: "npx"
    args: ["-y", "@pipeworx/mcp-nlrb"]
```

### Netclaw

```json
{
  "McpServers": {
    "pipeworx-io-nlrb": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@pipeworx/mcp-nlrb"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add pipeworx-io-nlrb -t stdio -c npx -a -y @pipeworx/mcp-nlrb
```

### Other

```json
{
  "mcpServers": {
    "pipeworx-io-nlrb": {
      "command": "npx",
      "args": [
        "-y",
        "@pipeworx/mcp-nlrb"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 81, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-11-03 (score 66, −14)

- [security regression] Malware scan: pass → unverified
- [functional] Package version: 0.2.0 → 0.2.1

### 2026-11-01 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 79, +1)

- [functional regression] Security disclosure: unverified → fail

### 2026-10-29 (score 78)

First indexed and scored.

## MCP tools (3)

### `nlrb_search` (~387 tokens)

Search US National Labor Relations Board cases by employer, union, or case number — unfair labor practice charges (C cases: CA against an employer, CB against a union) and union representation/election petitions (R cases: RC, RD, RM). Returns case number, case name, date filed, open/closed status, city and NLRB region for each match, plus the total number of matching cases. Answers "is Starbucks facing an NLRB charge", "labor board complaints against Amazon", "union election petitions at Trader Joe's", "what NLRB cases involve Teamsters Local 705". Filter by case type, status, date filed, and NLRB region.

Input parameters:

- `case_type` (string): Restrict to "C" (unfair labor practice charges) or "R" (representation/election petitions). Omit for both.
- `filed_before` (string): Only cases filed on or before this date (YYYY-MM-DD).
- `filed_since` (string): Only cases filed on or after this date (YYYY-MM-DD).
- `limit` (number|string): Max cases to return (1-50, default 10).
- `page` (number|string): Zero-based page of results, for paging past the first `limit` cases.
- `query` (string, required): Employer name, union name, or a full case number such as "10-CB-393760". Matched full-text against case names; case-insensitive.
- `region` (string): NLRB region number, e.g. "10" (Atlanta), "29" (Brooklyn). Two digits; single digits are zero-padded.
- `sort` (string): "newest" (default), "oldest", or "relevance".
- `status` (string): Restrict to "Open", "Closed", or "Open - Blocked".

### `nlrb_case` (~210 tokens)

Full docket for one US National Labor Relations Board case by case number (e.g. "10-CB-393760", "31-RC-357638"): the allegations charged under the National Labor Relations Act (such as "8(a)(3) Discharge" or "8(b)(1)(A) Duty of Fair Representation"), status, date filed, location, assigned region, the participants (charged party, charging party, employer, union and their legal representatives), the docket activity log, and for representation cases the election tally — eligible voters, ballots counted, votes for and against the union. Answers "what is Starbucks charged with in this NLRB case", "how did the union election in case 31-RC-357638 turn out".

Input parameters:

- `case_number` (string, required): NLRB case number in region-type-serial form, e.g. "10-CB-393760" or "31-rc-357638" (case-insensitive; surrounding whitespace ignored).

### `nlrb_recent_filings` (~256 tokens)

Newest US National Labor Relations Board case filings across the country over a recent window — the labor-dispute equivalent of a new-filings feed. Returns case number, name, date filed, status, city and region, newest first, with the total filed in the window. Answers "what NLRB charges were filed this week", "recent union election petitions", "how much labor board activity was there in the last 30 days". Filter by case type (C for unfair labor practice charges, R for election petitions) and NLRB region.

Input parameters:

- `case_type` (string): Restrict to "C" (unfair labor practice charges) or "R" (representation/election petitions). Omit for both. "ULP" is accepted as a synonym for C.
- `days` (number|string): How many days back from today to include (1-365, default 7).
- `limit` (number|string): Max cases to return (1-50, default 25).
- `region` (string): NLRB region number, e.g. "10", "29".
- `status` (string): Restrict to "Open", "Closed", or "Open - Blocked".

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/pipeworx-io-nlrb/pipeworx-mcp-nlrb#diagnostics

## Score history

- 2026-11-05: 81
- 2026-11-04: 81
- 2026-11-03: 66
- 2026-11-02: 80
- 2026-11-01: 80
- 2026-10-31: 79
- 2026-10-30: 79
- 2026-10-29: 78

## Common questions

### What is the Nlrb MCP server?

Nlrb is an MCP server listed in the public MCP registry as io.github.pipeworx-io/nlrb. NLRB MCP, US National Labor Relations Board case search: unfair labor practice (C) charges and… This page covers its npm package (@pipeworx/mcp-nlrb).

### Is the Nlrb MCP server safe to use?

Nlrb scores 81 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. Its build provenance is signed and verified. 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 Nlrb MCP server expose?

Nlrb exposes 3 tools: nlrb_search, nlrb_case, nlrb_recent_filings. Their descriptions and schemas cost roughly 853 tokens of context every time the server is loaded.

### Is the Nlrb MCP server still maintained?

Nlrb 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 Nlrb MCP server under?

Nlrb declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

### What did VerifyMCP test on the Nlrb MCP server?

VerifyMCP ran 16 checks on Nlrb, covering Malware scan, Known CVEs, Install scripts, Dependency health and 12 more. Endpoint Security and Transport & Reachability do not apply to an npm package, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.

## Links

- npm package: https://www.npmjs.com/package/@pipeworx/mcp-nlrb
- Socket report: https://socket.dev/npm/package/@pipeworx/mcp-nlrb
- Repository: https://github.com/pipeworx-io/mcp-nlrb
- Website: https://pipeworx.io/packs/nlrb
- Changelog RSS feed: https://verifymcp.io/servers/pipeworx-io-nlrb/pipeworx-mcp-nlrb.xml
- Changelog JSON feed: https://verifymcp.io/servers/pipeworx-io-nlrb/pipeworx-mcp-nlrb/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/pipeworx-io-nlrb/pipeworx-mcp-nlrb.json
- HTML version of this page: https://verifymcp.io/servers/pipeworx-io-nlrb/pipeworx-mcp-nlrb