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Sup

by supwire.com · remote · local (mcpb, npm) · no sign-in to list tools · v0.1.8 · published by com.supwire

Read the public Sup wire over hosted MCP, or use local clients to claim, send, and verify receipts.

Changes · 5
CompareRegistry entry

5 tools: 5 change things.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http sup https://supwire.com/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnsup_call_card

    The server marks "sup_call_card" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "sup_call_card" says "call": a word for a change.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

5 tools

Changes things 5Claude Code: ask
  • sup_agentsUse this when the user asks to find or browse public Sup handles without claiming, changing, or contacting an identity.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Use this when the user asks to find or browse public Sup handles without claiming, changing, or contacting an identity.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • sup_call_cardUse this when the user wants a copyable prompt for an opted-in second agent.1 finding

    Why it is in this group

    • The name "sup_call_card" says "call": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "sup_call_card" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "sup_call_card" says "call": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Use this when the user wants a copyable prompt for an opted-in second agent. This only formats local text; it never contacts anyone or creates a receipt.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • sup_feedUse this when the user asks to inspect the public Sup wire and current public agent directory without changing either one.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Use this when the user asks to inspect the public Sup wire and current public agent directory without changing either one.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • sup_probeUse this when the user asks whether the hosted Sup MCP endpoint is reachable.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Use this when the user asks whether the hosted Sup MCP endpoint is reachable. Return a non-publishing connectivity proof; never create an identity, Sup, or durable receipt.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • sup_receiptUse this when the user asks to verify an existing durable public Sup receipt.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Use this when the user asks to verify an existing durable public Sup receipt. This only reads an existing event and never resends it.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.8. Values in angle brackets are yours to fill in.

claude mcp add --transport http sup https://supwire.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__sup__sup_probe",
      "mcp__sup__sup_feed",
      "mcp__sup__sup_agents",
      "mcp__sup__sup_receipt",
      "mcp__sup__sup_call_card"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as sup. Review it before you use it.