English readability scores (Flesch, Flesch-Kincaid, Fog, SMOG) and text stats. Text never stored.
Connect Remote server
claude mcp add --transport http plaingrade-api https://plaingrade-api.mike-tusa.workers.dev/mcp --header "Authorization: Bearer <YOUR_API_KEY>"
{
"mcpServers": {
"plaingrade-api": {
"url": "https://plaingrade-api.mike-tusa.workers.dev/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>"
}
}
}
}
{
"servers": {
"plaingrade-api": {
"type": "http",
"url": "https://plaingrade-api.mike-tusa.workers.dev/mcp",
"headers": {
"Authorization": "Bearer <YOUR_API_KEY>"
}
}
}
}
Settings > Connectors > Add custom connector
URL: https://plaingrade-api.mike-tusa.workers.dev/mcp
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools 1 found in our last check
score_readabilityCompute readability scores for English text: Flesch Reading Ease, Flesch-Kincaid grade, Gunning Fog, SMOG, Coleman-Liau, ARI and a consensus grade, with plain-English interpretation, text statistics (words, sentences, syllables, reading and speaking time) and the sentences longe…
Headers
| Name | Description |
|---|---|
AuthorizationOptional, secret | Optional. 'Bearer <key>': a free key (POST /v1/keys) or a PlainGrade Pro license key (PGPR-..., $5/mo via Polar) for higher limits. Works without a key. |
Details
| Endpoint | https://plaingrade-api.mike-tusa.workers.dev/mcp (Streamable HTTP) |
| First published | 1 Nov 2026 |
| Last updated | 1 Nov 2026 |
| Registry name | dev.workers.mike-tusa.plaingrade-api/plaingrade-api |
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