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SUMMARU MCP server

Which MCP servers are SUMMARU's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-29

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Whose server it is
  • Registry nameapp.summaru.agent/breathverified in the MCP registry

The registry name sits under summaru.app. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-29
  • Stateanswerschecked 2026-10-29
  • Tools4
  • Server calls itselfsummaru-breath
  • Server version0.2.0
  • Protocol version2025-06-18

On 2026-10-29 the server answered initialize and tools/list without a sign-in. First answer in 94 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 4 of the 7 days it takes to judge reliability.

Once connected

  • Parameters are untyped or undescribed in 1 of 4 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 4, the first on 2026-10-29
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 4 so far
  • Answeredmeasuring4 of the 7 daily checks it takes to print a share
  • Median first answer100 ms
  • Space in an agent's context≈ 563 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsB · 79 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 4
  • Not saying whether it only reads or can destroy: 4 of 4

What an agent can do with it

  • not sure · follow a timed breathing pattern on screen
  • cannot · talk through your day with an AI companion
  • not sure · play layered background sounds for sleep or focus

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers4 tools · read 2026-10-29
  • list_breath_patterns

    List SUMMARU paced-breathing patterns with exact phase timing (seconds) and which languages have recorded voice guides.

  • get_breath_session

    Get a ready-to-play guided breathing session: audio URL (voice + singing-bowl cues, ~5 min) and a timeline of when each inhale/hold/exhale starts, or exact phase timing when no recording exists for that language. Show the attribution.

  • list_sounds

    List SUMMARU looping music tracks (sleep, calm, focus, warmth, bright, stillness, singing bowl) and binaural beat bands, each with a stream URL and a player link. Show the attribution.

  • get_sound

    Get one looping sound by id (music id like slow-harbor, or binaural band delta/theta/alpha/beta): stream URL, suggested volume, and a player link for the user.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "breath": {
      "type": "http",
      "url": "https://agent.summaru.app/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http summaru https://agent.summaru.app/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://agent.summaru.app/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.