# io.github.SpaceSheepBoy/justcaptions (remote · api.justcaptions.com)

Audio transcription, caption correction, translation and 16 video caption styles.

- Trust score: 73/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-23

## Components

- remote · `api.justcaptions.com`: 73/100 (this document), [markdown](https://verifymcp.io/servers/spacesheepboy-justcaptions/api.md), [page](https://verifymcp.io/servers/spacesheepboy-justcaptions/api)

## Channel facts

- Endpoint: `https://api.justcaptions.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.5.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, 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 2026-10-23.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 406, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 74/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 560 tokens (~62/item across 9 items; 9 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 63/100
  - Stability observed for 19 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 74/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 22% 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 9 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 10 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 io.github.SpaceSheepBoy/justcaptions MCP server?

io.github.SpaceSheepBoy/justcaptions is a hosted endpoint at https://api.justcaptions.com/mcp, so there is nothing to install locally. 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 --transport http spacesheepboy-justcaptions 'https://api.justcaptions.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "spacesheepboy-justcaptions": {
      "url": "https://api.justcaptions.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "spacesheepboy-justcaptions": {
      "type": "http",
      "url": "https://api.justcaptions.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.spacesheepboy-justcaptions]
url = "https://api.justcaptions.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "spacesheepboy-justcaptions": {
      "type": "remote",
      "url": "https://api.justcaptions.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add spacesheepboy-justcaptions --url 'https://api.justcaptions.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  spacesheepboy-justcaptions:
    url: "https://api.justcaptions.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "spacesheepboy-justcaptions": {
      "Transport": "http",
      "Url": "https://api.justcaptions.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add spacesheepboy-justcaptions -t streamable-http -u 'https://api.justcaptions.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "spacesheepboy-justcaptions": {
      "type": "http",
      "url": "https://api.justcaptions.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## 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.

### 2026-10-22 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-20 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-18 (score 71, +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.

### 2026-10-15 (score 70, +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.

### 2026-10-14 (score 69, 0)

- [security] Tool “list_styles” rewrote its description, which is the text the model reads

### 2026-10-13 (score 69, +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.

### 2026-10-12 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 27. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-10 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 20. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (9)

### `list_styles` (~37 tokens)

List 16 local rendering presets, aliases, style overrides and platform safe areas. This remote server returns the catalog; render via the local MCP.

### `list_fonts` (~31 tokens)

List named font IDs, licenses and script coverage. Pass font_id in local rendering overrides; no cloud video rendering.

### `get_pricing` (~21 tokens)

Current API prices and monthly free allowances, no key needed.

### `get_usage` (~23 tokens)

Current usage, estimated bill and monthly spend cap for your configured API key.

### `estimate_cost` (~45 tokens)

Estimate additional cloud charges and available allowance before a batch. Includes active budget holds; does not reserve credit.

Input parameters:

- `audio_seconds` (number)
- `text_chars` (integer)

### `transcribe_audio` (~94 tokens)

Transcribe extracted audio into segments and word timestamps. Max 12 MB decoded. Never send video. Charged by audio duration past the free allowance.

Input parameters:

- `audio_base64` (string, required)
- `glossary` (array)
- `language` (string)
- `mime_type` (string, required)
- `request_id` (string): Unique request ID; reuse only when retrying identical work to avoid repeating paid calls.

### `correct_captions` (~78 tokens)

Correct caption text, preserving caption count and order. Does not realign word timing. Billed by input characters.

Input parameters:

- `captions` (array, required)
- `glossary` (array)
- `language` (string)
- `request_id` (string): Unique request ID; reuse only when retrying identical work to avoid repeating paid calls.

### `translate_captions` (~82 tokens)

Translate caption lines, preserving count and order. Target-language word timing is estimated by the local renderer. Billed by input characters.

Input parameters:

- `captions` (array, required)
- `glossary` (array)
- `request_id` (string): Unique request ID; reuse only when retrying identical work to avoid repeating paid calls.
- `target_language` (string, required)

### `pick_emojis` (~60 tokens)

Pick one emoji for each caption. Billed by input characters.

Input parameters:

- `captions` (array, required)
- `language` (string)
- `request_id` (string): Unique request ID; reuse only when retrying identical work to avoid repeating paid calls.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/spacesheepboy-justcaptions/api#diagnostics

## Score history

- 2026-10-23: 73
- 2026-10-22: 73
- 2026-10-21: 72
- 2026-10-20: 72
- 2026-10-19: 71
- 2026-10-18: 71
- 2026-10-17: 70
- 2026-10-16: 70
- 2026-10-15: 70
- 2026-10-14: 69
- 2026-10-13: 69
- 2026-10-12: 68
- 2026-10-10: 67
- 2026-10-08: 66
- 2026-10-06: 65
- 2026-10-04: 64

## Common questions

### What is the io.github.SpaceSheepBoy/justcaptions MCP server?

io.github.SpaceSheepBoy/justcaptions is an MCP server listed in the public MCP registry as io.github.SpaceSheepBoy/justcaptions. Audio transcription, caption correction, translation and 16 video caption styles. This page covers its hosted endpoint (https://api.justcaptions.com/mcp).

### Is the io.github.SpaceSheepBoy/justcaptions MCP server safe to use?

io.github.SpaceSheepBoy/justcaptions scores 73 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 io.github.SpaceSheepBoy/justcaptions MCP server expose?

io.github.SpaceSheepBoy/justcaptions exposes 9 tools: list_styles, list_fonts, get_pricing, get_usage, estimate_cost, and 4 more. Their descriptions and schemas cost roughly 471 tokens of context every time the server is loaded.

### Does the io.github.SpaceSheepBoy/justcaptions MCP server require authentication?

No. We connected to io.github.SpaceSheepBoy/justcaptions without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the io.github.SpaceSheepBoy/justcaptions MCP server still maintained?

io.github.SpaceSheepBoy/justcaptions is still listed as active in the MCP registry. We last reached this channel on 23 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://api.justcaptions.com/mcp
- Authorisation metadata: https://api.justcaptions.com/.well-known/oauth-protected-resource/mcp
- Repository: https://github.com/SpaceSheepBoy/justcaptions-skill
- Website: https://justcaptions.com/agents/
- Changelog RSS feed: https://verifymcp.io/servers/spacesheepboy-justcaptions/api.xml
- Changelog JSON feed: https://verifymcp.io/servers/spacesheepboy-justcaptions/api.json
- HTML version of this page: https://verifymcp.io/servers/spacesheepboy-justcaptions/api