Authoritative JLPT-graded Japanese dataset (kanji, vocab, grammar, history) via MCP and REST.
Connect Remote server
claude mcp add --transport http potto-japan https://potto.app/mcp --header "Authorization: Bearer <YOUR_API_KEY>"
{
"mcpServers": {
"potto-japan": {
"url": "https://potto.app/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>"
}
}
}
}
{
"servers": {
"potto-japan": {
"type": "http",
"url": "https://potto.app/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>"
}
}
}
}
Settings > Connectors > Add custom connector
URL: https://potto.app/mcp
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server asks for a key before it lists its tools. Connect it with your own key to see them.
Headers
| Name | Description |
|---|---|
AuthorizationOptional, secret | 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. |
Details
| Endpoint | https://potto.app/mcp (Streamable HTTP) |
| First published | 14 Sep 2026 |
| Last updated | 14 Sep 2026 |
| Registry name | app.potto/potto-japan |
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