Plures

plures-mcp

An MCP server that gives any AI agent a human in the loop: an ask_humans tool that sends a decision to ID verified people and returns their consensus before the agent acts. Built on Plures.

Works with Claude Desktop, Claude Code, Cursor, VS Code, and agent frameworks that support MCP (OpenAI Agents SDK, LangChain, Vercel AI SDK and more).

Set up

Get a free test key at plures.si, then add the server to your client:

{
  "mcpServers": {
    "plures": {
      "command": "npx",
      "args": ["-y", "plures-mcp"],
      "env": { "PLURES_API_KEY": "pk_test_..." }
    }
  }
}

Claude Code: claude mcp add plures --env PLURES_API_KEY=pk_test_... -- npx -y plures-mcp

A pk_test_ key answers instantly with a simulated result (always the first option, clearly marked as a test), so you can try the flow for free. A pk_live_ key sends tasks to real verified people and is paid from prepaid credit at $0.20 per answer, more for recordings and videos by length. If credit runs out, the tool says so; add credit or turn on auto top up at plures.si/dashboard/billing.

Tools

ask_humans: send a judgment call to verified people.

Set route: "team" to send a decision straight to your own team instead of verified people (for confidential or policy calls), team to pick one of your named teams, team_votes to have several of them vote, and category to let your routing rules decide. Live, each internal vote is $0.05.

• question (required): what people should decide, answerable from the context alone
• options (required): 2 to 8 possible answers
• context: the material to judge, as plain text
• image_url, instructions
• audio_url or video_url with media_seconds: a clip up to 3 minutes that people play through before answering
• sensitive: disturbing content, shown only to people who opted in
• verifiers: 1, 3, 5, 7 or 9 (default 3)
• wait_seconds: how long to wait for the answer, 0 to 240 (default 45). If people haven't answered by then, the tool returns a task_id to check later.

get_human_answer: check a task by task_id, optionally waiting.

cancel_human_task: cancel a task that no longer matters.

Each result tells the agent the answer, how many people agreed and whether it is safe to act on. If you've added your team at plures.si/dashboard/team, decisions verified people don't all agree on go to your team, and the agent gets their decision as the final answer.

When agents should use it

The server tells the agent to ask people before acting on judgment calls where a mistake is costly: a customer's tone or intent, a refund or payment, whether an invoice, listing or document matches, a moderation edge case. Not for anything it can check with code or a lookup.

Tasks are shown to strangers, so the agent is told not to include secrets or more personal data than the decision needs.

Environment

• PLURES_API_KEY (required)
• PLURES_BASE_URL (optional, defaults to https://plures.si)

MIT licensed. Source: github.com/plureslabs/plures.