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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

{
  "mcpServers": {
    "potto-japan": {
      "type": "http",
      "url": "https://potto.app/mcp",
      "headers": {
        "Authorization": "Bearer ${POTTO_JAPAN_TOKEN}"
      }
    }
  }
}

claude mcp add --transport http potto-japan https://potto.app/mcp --header "Authorization: Bearer ${POTTO_JAPAN_TOKEN}"

[mcp_servers.potto-japan]
url = "https://potto.app/mcp"
bearer_token_env_var = "POTTO_JAPAN_TOKEN"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "potto-japan": {
      "type": "remote",
      "url": "https://potto.app/mcp",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:POTTO_JAPAN_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "potto-japan": {
      "type": "http",
      "url": "https://potto.app/mcp",
      "headers": {
        "Authorization": "Bearer ${POTTO_JAPAN_TOKEN}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=potto-japan&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vcG90dG8uYXBwL21jcCIsImhlYWRlcnMiOnsiQXV0aG9yaXphdGlvbiI6IkJlYXJlciAke1BPVFRPX0pBUEFOX1RPS0VOfSJ9fQ%3D%3D"
}

{
  "servers": {
    "potto-japan": {
      "type": "http",
      "url": "https://potto.app/mcp",
      "headers": {
        "Authorization": "Bearer ${POTTO_JAPAN_TOKEN}"
      }
    }
  }
}

{
  "mcpServers": {
    "potto-japan": {
      "httpUrl": "https://potto.app/mcp",
      "headers": {
        "Authorization": "Bearer ${POTTO_JAPAN_TOKEN}"
      }
    }
  }
}

extensions:
  "potto-japan":
    enabled: true
    name: "potto-japan"
    type: streamable_http
    uri: "https://potto.app/mcp"
    headers:
      "Authorization": "Bearer ${POTTO_JAPAN_TOKEN}"
    timeout: 300

Placeholders to fill from your own secret store: ${POTTO_JAPAN_TOKEN}. The registry never accepts secret values.

Quality 100 / 100strong

protocoln/a · weight 25

n/a
protocol.modern, protocol.stateless, protocol.transport, protocol.list_ttlno remote answered a protocol handshake (not probed yet, unreachable, or local-only)

authorization100 · weight 15

pass
auth.prmProtected Resource Metadata (RFC 9728) published
pass
auth.as_metadataauthorization server metadata reachable
pass
auth.cimdClient ID Metadata Documents supported
n/a
auth.secret_in_urlno templated URL

tool hygienen/a · weight 30

n/a
tools.descriptions, tools.description_length, tools.schemas, tools.annotations, tools.directory_hints, tools.token_cost, tools.api_dumptool list unknown (behind auth, not probed, or empty)

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pulltool list unknown

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

Tool list unknown · checked 2026-10-19 13:05 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 80 / 100

no-repository

provenance55

liveness100

freshness85

hygiene80

+dns-namespace +website +reachable +uptime-100% ~updated-35d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://potto.app/mcp` streamable-http	oauth2 AS: https://potto.app	yes	100%	401 ms	–	2026-10-19

Tools (0)

No tools observed. Tools appear once a credential-free probe can list them.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "app.potto/potto-japan",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://potto.app/mcp",
      "type": "streamable-http",
      "headers": [
        {
          "name": "Authorization",
          "isSecret": true,
          "description": "Bearer potto_ak_… API key from https://potto.app/developers/. Optional here because MCP clients can instead sign in via OAuth (the server issues a 401 + WWW-Authenticate challenge, RFC 9728). Free sample data is available on the REST API."
        }
      ]
    }
  ],
  "version": "1.0.1",
  "websiteUrl": "https://potto.app/developers/",
  "description": "Authoritative JLPT-graded Japanese dataset (kanji, vocab, grammar, history) via MCP and REST."
}