# io.github.SpaceSheepBoy/justcaptions

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

- name: io.github.SpaceSheepBoy/justcaptions
- version: 1.5.1
- connection class: R1 (autonomous)
- trust: 97/100
- quality: 88/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.SpaceSheepBoy%2Fjustcaptions
- tools: https://api.protogrid.dev/v1/servers/io.github.SpaceSheepBoy%2Fjustcaptions/tools

**An agent can connect on its own if it already holds `JUSTCAPTIONS_TOKEN`.** Remote endpoint behind a static API key or header. The registry never sees the value; the agent fills the placeholder.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "justcaptions": {
      "type": "http",
      "url": "https://api.justcaptions.com/mcp",
      "headers": {
        "Authorization": "Bearer ${JUSTCAPTIONS_TOKEN}"
      }
    }
  }
}
```

Placeholders to fill: `${JUSTCAPTIONS_TOKEN}`.

## Trust

- hygiene: 100
- liveness: 99
- freshness: 100
- provenance: 90
- drivers: +repository +namespace-matches-repo +website +reachable +uptime-97% +updated-6d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 88/100 (good)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 93 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 9 of 9 tools declare readOnlyHint or destructiveHint
- warn `tools.directory_hints`: 4 of 9 tools declare all four hints; missing: list_fonts (openWorldHint); get_pricing (openWorldHint); get_usage (openWorldHint); …
- pass `tools.token_cost`: about 1,106 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 2 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 9, about 1,106 tokens to load them all
- tool set hash: cf4e504cc83b573905ae341202ace31b
- tools last changed: 2026-10-14T22:41:37.880Z
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.SpaceSheepBoy/justcaptions.svg)](https://protogrid.dev/servers/io.github.SpaceSheepBoy/justcaptions)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-14 `list_styles` changed (description)
  - before: List 15 local rendering presets, aliases, style overrides and platform safe areas. This remote server returns the catalog; render via the local MCP.
  - after: List 16 local rendering presets, aliases, style overrides and platform safe areas. This remote server returns the catalog; render via the local MCP.
- 2026-10-07 `list_fonts` added
  - List named font IDs, licenses and script coverage. Pass font_id in local rendering overrides; no cloud video rendering.

Full history: https://api.protogrid.dev/v1/servers/io.github.SpaceSheepBoy%2Fjustcaptions/changes

## Remotes

- https://api.justcaptions.com/mcp (streamable-http, auth api_key ${JUSTCAPTIONS_TOKEN}, reachable true, uptime30d 0.9692308)

## Packages

_none_

## Tools (9)

- `correct_captions`: Correct caption text, preserving caption count and order. Does not realign word timing. Billed by input characters.
- `estimate_cost`: Estimate additional cloud charges and available allowance before a batch. Includes active budget holds; does not reserve credit.
- `get_pricing`: Current API prices and monthly free allowances, no key needed.
- `get_usage`: Current usage, estimated bill and monthly spend cap for your configured API key.
- `list_fonts`: List named font IDs, licenses and script coverage. Pass font_id in local rendering overrides; no cloud video rendering.
- `list_styles`: List 16 local rendering presets, aliases, style overrides and platform safe areas. This remote server returns the catalog; render via the local MCP.
- `pick_emojis`: Pick one emoji for each caption. Billed by input characters.
- `transcribe_audio`: Transcribe extracted audio into segments and word timestamps. Max 12 MB decoded. Never send video. Charged by audio duration past the free allowance.
- `translate_captions`: Translate caption lines, preserving count and order. Target-language word timing is estimated by the local renderer. Billed by input characters.