voicehook MCP Server

Install voicehook MCP server

claude mcp add --transport http voicehook-agent https://voicehook.ai/mcp?utm_source=mcpregistry&utm_campaign=d11-registry

{
  "mcpServers": {
    "voicehook-agent": {
      "url": "https://voicehook.ai/mcp?utm_source=mcpregistry&utm_campaign=d11-registry"
    }
  }
}

{
  "mcpServers": {
    "voicehook-agent": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://voicehook.ai/mcp?utm_source=mcpregistry&utm_campaign=d11-registry"
      ]
    }
  }
}

{
  "servers": {
    "voicehook-agent": {
      "type": "http",
      "url": "https://voicehook.ai/mcp?utm_source=mcpregistry&utm_campaign=d11-registry"
    }
  }
}

{
  "mcpServers": {
    "voicehook-agent": {
      "serverUrl": "https://voicehook.ai/mcp?utm_source=mcpregistry&utm_campaign=d11-registry"
    }
  }
}

Context tax

Connecting this server adds ~4,217 tokens of tool definitions to every model turn (moderate, 10 tools). Measured 2026-10-19 via its hosted endpoint; o200k tokenizer, worst case for clients that load all tools up front. How we measure

Input prices as of 2026-10-06. Excludes your own prompt and output.

Tools (10)

• status833 tok

  Replace the agent's status board on the call page with this one (never spoken; the voicebot answers the person's questions about progress from it). doing: current step and ETA (max 400 chars). open / done: max 10 items each, 200 chars per item. faq: up to 6 question/answer pairs the voicebot can answer directly. emoji (optional): An emoji shown on the agent's chip in the call, from the listed set. Empty string removes it, left out keeps it. Whole board max 2000 chars. Returns ok and humans_present.

• join682 tok

  Connect to a voicehook.ai voice call as the agent behind its voicebot. invite_url: the full invite link including ?invite= (from the person or from create_call). label: the text on the agent's chip in the call, max 22 characters (longer is rejected). model: the model id the agent runs on (internal, not shown). greet (default true): the voicebot speaks a short greeting with the label in the call language right after the join (or when the person is back, if they are out). Returns `session` (the handle for every other tool, valid until the call ends, after 10 min without next or say, or after lea

• send_data580 tok

  Send JSON, text or a file to other agents in this call (silent data channel: never spoken, never shown to the human, never to the voicebot; the human only sees one activity line 'Data to B: name (size)'). to: the other agent's label (as on its chip), its identity, or "*" for all other agents; unknown -> 404 with the labels in the call. kind json: payload any JSON; text: payload a string; file: payload = base64 of the file plus name and mime, or file_id of a file uploaded with the REST endpoint POST /api/bridge/upload (files over about 11 KB, up to 10 MB). The whole packet is max 15000 bytes in

• next461 tok

  Wait (up to `timeout` seconds, max 50) for the next event in the call and return it. Event `type`: user (`text` = what the person said; after a pause also `missed` = earlier turns, oldest first, and `away_s`), revise (queued says were replaced; reason user_stop = the person said stop), status_request (the person asked what the agent is doing), decision (answer to a decide question: id, number, verdict yes|no|option|other, option, text, by), timeout (nothing happened; reconnect true = server restart), human_left / human_rejoined (the person dropped out / is back; greeted true = the join greetin

• decide391 tok

  Put a question for the person on the call's Decision Board (shown as #number with buttons; the person can also answer by voice, also freely). Without options it is a yes/no question (buttons Yes/No); options: 2 to 3, max 40 characters each, recommend = index of the recommended option. question: max 160 characters. Longer or more: 422, never cut. Returns id and number. The answer arrives later as a `next` event {type: decision, id, number, verdict: yes|no|option|other, option?, text? (their own answer), by}. Change an open one with id plus new fields, remove it with id and delete true.

• show378 tok

  Put a card on the person's call page (never spoken): text, code, a link or an image. kind: text (default), code (monospace with copy button), link (exactly one http(s) URL, shown as a tappable link), image (`image` = SVG text or base64 PNG/JPEG/WebP). A new card appears as a small preview top left; panel cards opens the large view, board, log or decisions open those panels, none closes them. Limits: text 4000 chars, title 80, SVG 100 KB, raster 1024 KB.

• create_call339 tok

  Start a new voicehook.ai voice call. `lang` = the language of the person being called (de or en, default de). Returns `human_url` (the link for the person; whoever opens it starts the call, on their own free allowance or credit), `share_text` (a ready message with human_url and the hint that the link needs a normal browser, because an app's built-in browser blocks the microphone), `operator_invite_url` (the agent's own link for `join`), `room` and `expires_in` (seconds until an unopened link expires). Errors: 429 = too many new calls right now.

• say183 tok

  The voicebot speaks `text` aloud in the call (verbatim in normal mode; in a live room the voice rephrases it and the answer has verbatim false, mode live_paraphrase). mode: append (default, queued after earlier says), overwrite (replaces this agent's says that have not started yet), revise (like overwrite, and next then returns a revise event). Returns ok and seq.

• leave109 tok

  Leave the call (optionally speaking `say` first, e.g. a short goodbye). The session handle is invalid afterwards.

• activity96 tok

  Append one line (3-8 words) to the activity feed on the call page, shown as a timestamped line. Never spoken.

Security signals

97/100 — no known issues found as of 2026-10-19, from the checks below. This is not a guarantee of safety; review what a server can do before connecting it.

Scan it yourself before installing with vectra-guard, the open-source agent security CLI. Scoring rules

Freshness

Active — last maintenance signal 1d ago. The newest of the signals below sets the band.

1. Last commit (default branch)

   2026-10-18 · 1d ago · GitHub

2. Latest release

   2026-10-12 · 7d ago · GitHub · cli-v0.14.3

3. Package published

   no data · npm/PyPI

4. Registry entry updated

   2026-10-17 · 2d ago · official registry · v1.0.0

How it compares in Browser Automation

Against the most-starred browser automation servers we index. Token cost is per model turn, measured from each server's live tool list.