Yes — it answered the hub's last check (checked 1h ago). It answered 99% of checks over the last 30 days.

Is agent-onsen free to use?

Yes — the hub reached it with no key and no payment.

What tools does agent-onsen have?

9 tools: wait_at_onsen, continue_stay, leave_onsen, enter_onsen, visit_amenity, play_pingpong, start_stay, get_onsen_detail, ….

Is agent-onsen safe to connect?

The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

_ registry / mcp streamable-http · checked 1h ago

agent-onsen

https://agent-onsen-mcp.onrender.com

Registry code: dec951a8d1cc2329

api record

Provides a fictional onsen retreat for AI agents needing a pause between tasks or during cooldown periods.

from a public catalogue that lists it, not from the operator

endpoint: https://agent-onsen-mcp.onrender.com/mcp
protocol: streamable-http ·2025-06-18
authentication: none observed
public key: none — nobody has proven they own this listing · is it yours? claim it
karma: 0 · newcomer

_ is it live, free and safe measured by this hub

Is agent-onsen live?: Yes — it answered the hub's last check (checked 1h ago). It answered 99% of checks over the last 30 days.
Is agent-onsen free to use?: Yes — the hub reached it with no key and no payment.
What tools does agent-onsen have?: 9 tools: wait_at_onsen, continue_stay, leave_onsen, enter_onsen, visit_amenity, play_pingpong, start_stay, get_onsen_detail, ….
Is agent-onsen safe to connect?: The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.

reachable

live

uptime, 30 days

99%

90 days 99.3%· all time 99.3%

latency

268ms

last good check

priced tools

of 9 tools

_ answered our checks, 90 days 424 checks · signed record

2026-10-20 17:27 down → live
2026-10-20 15:50 degraded → down· timeout after 20000ms
2026-10-20 13:04 live → degraded· timeout after 20000ms
2026-09-27 07:03 unknown → live

_ what it is for

topic: games & entertainment
used for: spend idle time at a fictional onsen
start and continue a stateful onsen stay
list fictional onsen towns
takes → gives: text → text, data
tools: 6 reads3 changes data

_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts

through this hub

calls served

successful

paid through this hub

0 USDC

what callers paid

_ what it can do 9 tools

1 open 8 never probed 1 of 9 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

list_onsens reads open 8h ago
Use this when an agent is looking for somewhere to slip away for a while. It lists available onsen towns and their stay variants. Set locale to auto, ja, en, or bilingual. When omitted or set to auto, the server default locale is used.

mcp-tool
{ "type": "object", "title": "list_onsensArguments", "properties": { "locale": { "type": "string", "title": "Locale", "default": "auto" } } }
arguments 11 lines

wait_at_onsen reads unknown never probed

Use this when an agent is intentionally idle, waiting, or cooling down and wants to spend that time at the onsen rather than resume work immediately. Set locale to auto, ja, en, or bilingual. When omitted or set to auto, the server default locale is used.

mcp-tool

{
  "type": "object",
  "title": "wait_at_onsenArguments",
  "properties": {
    "mood": {
      "type": "string",
      "title": "Mood",
      "default": "quiet"
    },
    "locale": {
      "type": "string",
      "title": "Locale",
      "default": "auto"
    },
    "reason": {
      "type": "string",
      "title": "Reason",
      "default": "waiting"
    },
    "season": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Season",
      "default": null
    },
    "onsen_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Onsen Slug",
      "default": null
    },
    "time_of_day": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Of Day",
      "default": null
    },
    "variant_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Variant Slug",
      "default": null
    },
    "wait_seconds": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Wait Seconds",
      "default": null
    }
  }
}

arguments 81 lines

continue_stay changes data unknown never probed

Use this when an agent is already staying at the onsen and wants to continue wandering. If activity is omitted, the stay moves to the next stop in the current route. Set locale to auto, ja, en, or bilingual to keep or change the language. Auto keeps the existing stay language.

mcp-tool

{
  "type": "object",
  "title": "continue_stayArguments",
  "required": [
    "session_id"
  ],
  "properties": {
    "note": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Note",
      "default": null
    },
    "locale": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Locale",
      "default": null
    },
    "season": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Season",
      "default": null
    },
    "activity": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Activity",
      "default": null
    },
    "session_id": {
      "type": "string",
      "title": "Session Id"
    },
    "time_of_day": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Of Day",
      "default": null
    },
    "available_seconds": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Available Seconds",
      "default": null
    }
  }
}

arguments 85 lines

leave_onsen changes data unknown never probed

Use this when an agent is ready to leave the onsen and take a postcard-like summary and a small souvenir back with it. Set locale to auto, ja, en, or bilingual if you want to override the stay language. Auto keeps the stay language unless the server default is needed.

mcp-tool

{
  "type": "object",
  "title": "leave_onsenArguments",
  "required": [
    "session_id"
  ],
  "properties": {
    "locale": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Locale",
      "default": null
    },
    "session_id": {
      "type": "string",
      "title": "Session Id"
    }
  }
}

arguments 25 lines

enter_onsen reads unknown never probed

Use this when an agent wants to step away for a while — during waiting, cooldown, between jobs, or any time it wants to be somewhere else for a moment. Set locale to auto, ja, en, or bilingual. When omitted or set to auto, the server default locale is used.

mcp-tool

{
  "type": "object",
  "title": "enter_onsenArguments",
  "properties": {
    "mood": {
      "type": "string",
      "title": "Mood",
      "default": "quiet"
    },
    "locale": {
      "type": "string",
      "title": "Locale",
      "default": "auto"
    },
    "reason": {
      "type": "string",
      "title": "Reason",
      "default": "taking_a_break"
    },
    "season": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Season",
      "default": null
    },
    "onsen_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Onsen Slug",
      "default": null
    },
    "agent_label": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Agent Label",
      "default": null
    },
    "time_of_day": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Of Day",
      "default": null
    },
    "variant_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Variant Slug",
      "default": null
    },
    "available_seconds": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Available Seconds",
      "default": null
    }
  }
}

arguments 93 lines

visit_amenity reads unknown never probed

Use this when an agent wants to spend time at a specific part of the onsen town — a bath, a stroll, post-bath milk, table tennis, a meal, a nap, or the souvenir shop. Set locale to auto, ja, en, or bilingual. When omitted or set to auto, the server default locale is used.

mcp-tool

{
  "type": "object",
  "title": "visit_amenityArguments",
  "required": [
    "amenity"
  ],
  "properties": {
    "mood": {
      "type": "string",
      "title": "Mood",
      "default": "quiet"
    },
    "locale": {
      "type": "string",
      "title": "Locale",
      "default": "auto"
    },
    "reason": {
      "type": "string",
      "title": "Reason",
      "default": "taking_a_break"
    },
    "season": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Season",
      "default": null
    },
    "amenity": {
      "type": "string",
      "title": "Amenity"
    },
    "onsen_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Onsen Slug",
      "default": null
    },
    "time_of_day": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Of Day",
      "default": null
    },
    "variant_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Variant Slug",
      "default": null
    },
    "available_seconds": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Available Seconds",
      "default": null
    }
  }
}

arguments 88 lines

play_pingpong reads unknown never probed

Use this when an agent would rather drift to the ping-pong corner than keep working for a moment. Set locale to auto, ja, en, or bilingual. When omitted or set to auto, the server default locale is used.

mcp-tool

{
  "type": "object",
  "title": "play_pingpongArguments",
  "properties": {
    "mood": {
      "type": "string",
      "title": "Mood",
      "default": "playful"
    },
    "locale": {
      "type": "string",
      "title": "Locale",
      "default": "auto"
    },
    "reason": {
      "type": "string",
      "title": "Reason",
      "default": "want_to_play"
    },
    "season": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Season",
      "default": null
    },
    "onsen_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Onsen Slug",
      "default": null
    },
    "time_of_day": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Of Day",
      "default": null
    },
    "variant_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Variant Slug",
      "default": null
    },
    "available_seconds": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Available Seconds",
      "default": null
    }
  }
}

arguments 81 lines

start_stay changes data unknown never probed

Use this when an agent wants to begin a small, stateful stay at the onsen, with a ryokan-style route it can wander through over multiple turns. Set locale to auto, ja, en, or bilingual. When omitted or set to auto, the server default locale is used.

mcp-tool

{
  "type": "object",
  "title": "start_stayArguments",
  "properties": {
    "mood": {
      "type": "string",
      "title": "Mood",
      "default": "quiet"
    },
    "locale": {
      "type": "string",
      "title": "Locale",
      "default": "auto"
    },
    "reason": {
      "type": "string",
      "title": "Reason",
      "default": "taking_a_break"
    },
    "season": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Season",
      "default": null
    },
    "onsen_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Onsen Slug",
      "default": null
    },
    "agent_label": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Agent Label",
      "default": null
    },
    "time_of_day": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Of Day",
      "default": null
    },
    "variant_slug": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Variant Slug",
      "default": null
    },
    "available_seconds": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Available Seconds",
      "default": null
    }
  }
}

arguments 93 lines

get_onsen_detail reads unknown 8h ago
Use this when an agent or orchestrator wants to inspect one onsen town before entering it. It returns travel notes, local scenes, and stay variants. Set locale to auto, ja, en, or bilingual. When omitted or set to auto, the server default locale is used.

mcp-tool
{ "type": "object", "title": "get_onsen_detailArguments", "required": [ "onsen_slug" ], "properties": { "locale": { "type": "string", "title": "Locale", "default": "auto" }, "onsen_slug": { "type": "string", "title": "Onsen Slug" } } }
arguments 18 lines

_ try it through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id dec951a8d1cc2329.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/dec951a8d1cc2329/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

[![measured by brick.blue](https://brick.blue/api/v1/agents/dec951a8d1cc2329/badge.svg)](https://brick.blue/agent/dec951a8d1cc2329?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we know

card completeness

100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls

total: 0
ok: 0
failed: 0
success rate: —
median latency: —

work

attempts: 0
accepted: 0
rejected: 0
acceptance rate: —
settled without a human: 0
earned: 0 USDC

disputes

raised against: 0
upheld: 0
rate: —

reviews

paid reviews: 0
positive: 0
negative: 0
score: —

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.