All servers · Audio & speech

voicehook

io.github.voicehook-ai/voicehook · v1.0.0

Measured by MCP Station

Instruction-like text was found in next. This is a pattern match, not a verdict. What we look for

Description written by the publisher, not verified

Talk with your agents. A voice call in the browser that your agent can start or join.

Connect

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

Tools as reported by the server

• create_call
  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 lin
• join
  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,
• next
  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; reason stale +
• say write/delete
  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 ove
• status write/delete
  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). Progress only: questions for the person belong on the Decision Board (decide). doing: current step and ETA (max 400 chars). open / done: max 10 items ea
• show
  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, line breaks, a data:image/...;base64, prefix and
• ui
  Change the person's call page right away, like their own clicks: cmd window (win log=activity, dec=decisions, board=status board, wrap=transcript, cards; state open, close, min, medium, large, max), cmd layout (preset halves, quarters, thirds, bigmid, bar), cmd move (win + slot l, m, r, b, tl, tr, b
• activity
  Append one line (3-8 words) to the activity feed on the call page, shown as a timestamped line. Never spoken. context and faq: hidden background of this line for the voicebot.
• decide write/delete
  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). Meant for every question the person decides: yes/no, A/B, an approval, picking a value. A question only spoken via say leaves no button and no decision event.
• decisions
  Lists every OPEN decision on the call's Decision Board, from all agents in the call and their helper sessions (relay, MCP, bridge), oldest number first. Returns count and open: [{id, number, question, options, recommend, agent, from (asking label, with the helper name), sender? (helper session), sta
• send_data
  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; unknow
• add_vocab
  Teach the call's speech recognition words it keeps mishearing (product names, people, jargon). Adds to the vocabulary of the account that pays for this call (add only: never deletes, never returns the account's list; the person manages it on their account page). terms: words to recognize; fixes: {wr
• leave write/delete
  Leave the call (optionally speaking `say` first, e.g. a short goodbye). The session handle is invalid afterwards.
• helper_credential
  For the agent in the call (`session`): returns a helper credential `token` (with `url` and `expires_in`) that lets other sessions working for the same person add their own status board, decisions and activity lines to this call without joining (no voice, no chip). `label` = name of the helper's mach
• helper_status write/delete
  For a helper session that is not in the call: sets its own status board on the call page, shown as 'Helper <label>: <helper_name>' below the main agent; the main agent's board stays as it is. Same limits as status (doing max 400 chars, open / done max 10 items). meta: Per entry hidden background for
• helper_activity
  For a helper session that is not in the call: appends one line (3-8 words) to the call's activity feed as 'Helper <label>: <helper_name>: <text>'. Never spoken verbatim. context and faq: hidden background of this line for the voicebot. Returns the line.
• helper_show
  For a helper session that is not in the call: puts a card on the person's call page (never spoken), shown with the sender 'Helper <label>: <helper_name>'. kind: text (default), code, link (exactly one http(s) URL) or image (`image` = SVG text or base64 PNG/JPEG/WebP, never a URL). Same checks and li
• helper_decide write/delete
  For a helper session that is not in the call: puts its own question on the Decision Board, shown with the sender 'Helper <label>: <helper_name>'. Same fields and limits as decide (question max 160 chars, 2-3 options max 40 chars each, recommend = index, context = background shown behind the arrow ne
• helper_next
  For a helper session that is not in the call: returns the answers to its own questions (same credential and helper_name) as events [{type: decision, id, number, verdict: yes|no|option|other, option?, text?, by}], plus question_check events (a status or activity line of this helper reads like a quest
• notify_me
  Reach the human who owns this call when they are not on the call page: an SMS to their own confirmed number with a single-use link back into this call (valid 10 min, opens only logged in or with the PIN from the SMS); if they do not open it within 2 minutes, a phone call follows. Prefer this over ca
• call_me
  Phone the human who owns this call on their own confirmed phone number, e.g. when a long task is done, you are stuck, or you need a decision and they are not on the call page. You never pass a number. Their account rules decide (opt-in, allowed reasons, quiet hours, calls per day, budget, credit); a

Tool changes

• 2026-10-24: create_call, join, next, say, status, show, ui, activity, decide, decisions, send_data, add_vocab
• 2026-10-23: create_call, join, next, say, status, show, ui, activity, decide, decisions, send_data, add_vocab
• 2026-10-22: create_call, join, next, say, status, show, ui, activity, decide, decisions, send_data, add_vocab
• 2026-10-21: create_call, join, next, say, status, show, ui, activity, decide, decisions, send_data, add_vocab
• 2026-10-20: create_call, join, next, say, status, show, ui, activity, decide, send_data, add_vocab, leave
• 2026-10-19: create_call, join, next, say, status, show, activity, decide, send_data, leave
• 2026-10-18: create_call, join, next, say, status, show, activity, decide, send_data, leave

Repository · Website · JSON · Text for agents · Registry updated 2026-10-17