# io.github.Apertur3/headroom (npm · headroomd)

Live subscription limits, resets and budget checks for coding agents over MCP.

- Trust score: 82/100 (high trust)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- npm · `headroomd`: 82/100 (this document), [markdown](https://verifymcp.io/servers/apertur3-headroom/headroomd.md), [page](https://verifymcp.io/servers/apertur3-headroom/headroomd)

## Channel facts

- Registry: `npm`
- Package: `headroomd`
- Version: `0.2.20`
- 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**: 100/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to Apertur3/headroom).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 55/100
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 1240 tokens (~72/item across 17 items; 17 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 60/100
  - Stability observed for 18 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 67/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% 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 17 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 17 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the io.github.Apertur3/headroom MCP server?

io.github.Apertur3/headroom runs locally as an npm package, launched with npx -y headroomd. 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 apertur3-headroom -- npx -y headroomd
```

### Cursor

```json
{
  "mcpServers": {
    "apertur3-headroom": {
      "command": "npx",
      "args": [
        "-y",
        "headroomd"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "apertur3-headroom": {
      "command": "npx",
      "args": [
        "-y",
        "headroomd"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add apertur3-headroom -- npx -y headroomd
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "apertur3-headroom": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "headroomd"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add apertur3-headroom --command npx --arg -y --arg headroomd
```

### Hermes

```yaml
mcp_servers:
  apertur3-headroom:
    command: "npx"
    args: ["-y", "headroomd"]
```

### Netclaw

```json
{
  "McpServers": {
    "apertur3-headroom": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "headroomd"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add apertur3-headroom -t stdio -c npx -a -y headroomd
```

### Other

```json
{
  "mcpServers": {
    "apertur3-headroom": {
      "command": "npx",
      "args": [
        "-y",
        "headroomd"
      ]
    }
  }
}
```

## 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 82, +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.

### 2026-11-03 (score 81, +31)

- [security improvement] Injection markers: unverified → pass
- [functional regression] MCP protocol: unverified → fail
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Stability: unverified → 0.53
- [functional] Package version: 0.2.18 → 0.2.20
- [functional] Package version: 0.2.18 → 0.2.19

### 2026-11-02 (score 50, −30)

- [security regression] Tool safety: pass → unverified
- [security regression] Stability: 0.47 → unverified
- [functional regression] Capabilities: fail → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional] Package version: 0.2.17 → 0.2.18

### 2026-10-31 (score 80, +1)

- [functional] Package version: 0.2.15 → 0.2.17
- [functional] Package version: 0.2.15 → 0.2.16
- [functional] Package version: 0.2.14 → 0.2.15

### 2026-10-29 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 76, 0)

- [functional] Package version: 0.2.14 → 0.2.15

## MCP tools (17)

### `quota_status` (~19 tokens)

Return the latest quota windows for every Headroom meter.

### `quota_can` (~96 tokens)

Check whether an action class can consume all of its meters. With no expect_percent, reports the learned cost and confidence for this action class; lease atomically reserves every consumed meter for the learned (or given) expectation so the next call learns too.

Input parameters:

- `action_class` (string, required)
- `allow_unknown` (boolean)
- `expect_percent` (number)
- `lease` (boolean)
- `owner` (string, required)

### `quota_events` (~30 tokens)

Return Headroom events since an ISO timestamp or duration resolved by the caller.

Input parameters:

- `since` (string)

### `quota_lease_start` (~79 tokens)

Reserve a meter for an orchestrator. owner defaults to this MCP session's client name and session id when omitted.

Input parameters:

- `action_class` (string)
- `expected_percent` (number)
- `meter_id` (string, required)
- `note` (string)
- `owner` (string)
- `ttl_ms` (number)

### `quota_lease_end` (~70 tokens)

End a meter lease. A different owner must set force plus confirm_force and a reason, both of which are audited.

Input parameters:

- `confirm_force` (boolean)
- `force` (boolean)
- `id` (string, required)
- `owner` (string, required)
- `reason` (string)

### `quota_leases` (~16 tokens)

List meter leases and estimated spend.

### `quota_cost` (~34 tokens)

Learned median, interquartile range and sample count of spent percent, per action class.

Input parameters:

- `action_class` (string)

### `quota_rate` (~55 tokens)

Burn in percent per hour over the last N minutes. need selects a vendor-reported window.

Input parameters:

- `meter` (string)
- `minutes` (number)
- `need` (string)
- `owner` (string)

### `quota_spend` (~90 tokens)

Per-owner attributed spend on shared meters: how much of each window's actual movement the spend ledger books to each lease owner, with a confidence. The owner `unattributed` is movement that happened while no lease was open. since is an ISO timestamp, defaulting to 24 hours ago.

Input parameters:

- `meter` (string)
- `owner` (string)
- `since` (string)

### `quota_inbox` (~66 tokens)

Read this session's hand-off messages from <HEADROOM_HOME>/inbox/<session>/, oldest first, marking each read. Read-only: sending a message is `headroom inbox send`, never this tool.

Input parameters:

- `session` (string, required)
- `since` (number)

### `quota_plan` (~61 tokens)

Points available per remaining vendor-reported window before reset, including advisory banked-reset guidance. need selects that window.

Input parameters:

- `meter` (string, required)
- `need` (string)
- `reserve_percent` (number)
- `target_points` (number)

### `quota_gate` (~125 tokens)

Pre-dispatch check for vendor-reported windows. needs accepts 5h, wk, 30d, or an exact <n>m, <n>h, or <n>d duration.

Input parameters:

- `action_class` (string)
- `allowance` (string)
- `cap_percent` (number)
- `duration_minutes` (number)
- `meter` (string)
- `needs` (array, required)
- `owner` (string)
- `plan` (boolean)
- `plan_share_percent` (number)
- `reserve_percent` (number)

### `quota_wait` (~39 tokens)

Returns immediately (never blocks) with the meter's reset time and a suggested sleep, for a caller that polls itself.

Input parameters:

- `meter` (string, required)

### `quota_fill` (~98 tokens)

How many more lanes fit before a vendor-reported window resets. need selects that window.

Input parameters:

- `action_class` (string)
- `allowance` (string)
- `duration_minutes` (number)
- `lane_cost_percent` (number)
- `meter` (string, required)
- `need` (string)
- `owner` (string)
- `plan_share_percent` (number)
- `weekly_reserve_percent` (number)

### `quota_usage_paste` (~107 tokens)

Turn the text of Claude Code's /usage panel into observations, for a meter Headroom cannot poll (a denied probe, or a model-scoped weekly bar the account-wide window hides). text is the pasted panel; principal names the Claude principal and is required when more than one is configured. Stores the readings the same way a poll does, so status, gate, can, rate and route see them immediately.

Input parameters:

- `principal` (string)
- `text` (string, required)

### `quota_route` (~100 tokens)

Among the principals routing.toml's [consumes] entry for this action class allows, picks the one with the most remaining headroom on its own tightest window and returns its launch environment (e.g. CLAUDE_CONFIG_DIR for a second Claude profile). Every candidate's own state and reason is reported too, not just the winner.

Input parameters:

- `action_class` (string, required)
- `allow_unknown` (boolean)
- `owner` (string, required)

### `quota_heartbeat` (~155 tokens)

Record or refresh this orchestrator's heartbeat lease with the daemon -- the one process that survives a crashed session -- so a lapse past 2x interval_ms is noticed and, once configured, notified. owner defaults to this MCP session's client name and session id, same as quota_lease_start. resume_sentence is what a human or a fresh session should do to pick this session's work back up; omit it on a plain re-beat to keep whatever was registered before. Pass stop: true to deregister instead of beating (interval_ms and resume_sentence are ignored then).

Input parameters:

- `interval_ms` (number)
- `owner` (string)
- `resume_sentence` (string)
- `stop` (boolean)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/apertur3-headroom/headroomd#diagnostics

## Score history

- 2026-11-05: 82
- 2026-11-04: 82
- 2026-11-03: 81
- 2026-11-02: 50
- 2026-11-01: 80
- 2026-10-31: 80
- 2026-10-30: 79
- 2026-10-29: 79
- 2026-10-28: 78
- 2026-10-27: 78
- 2026-10-26: 77
- 2026-10-25: 77
- 2026-10-24: 76
- 2026-10-23: 76
- 2026-10-22: 35
- 2026-10-21: 75
- 2026-10-20: 75
- 2026-10-19: 74
- 2026-10-18: 39

## Common questions

### What is the io.github.Apertur3/headroom MCP server?

io.github.Apertur3/headroom is an MCP server listed in the public MCP registry as io.github.Apertur3/headroom. Live subscription limits, resets and budget checks for coding agents over MCP. This page covers its npm package (headroomd).

### Is the io.github.Apertur3/headroom MCP server safe to use?

io.github.Apertur3/headroom scores 82 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 io.github.Apertur3/headroom MCP server expose?

io.github.Apertur3/headroom exposes 17 tools: quota_status, quota_can, quota_events, quota_lease_start, quota_lease_end, and 12 more. Their descriptions and schemas cost roughly 1,240 tokens of context every time the server is loaded.

### Is the io.github.Apertur3/headroom MCP server still maintained?

io.github.Apertur3/headroom 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 io.github.Apertur3/headroom MCP server under?

io.github.Apertur3/headroom declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/headroomd
- Socket report: https://socket.dev/npm/package/headroomd
- Repository: https://github.com/Apertur3/headroom
- Changelog RSS feed: https://verifymcp.io/servers/apertur3-headroom/headroomd.xml
- Changelog JSON feed: https://verifymcp.io/servers/apertur3-headroom/headroomd.json
- HTML version of this page: https://verifymcp.io/servers/apertur3-headroom/headroomd