Plainvoice MCP server

The server URL is https://plainvoice.ai/mcp. Clients that speak streamable HTTP can add that URL. The plugin is free to use. Every tool runs on the Free plan, inside the Free plan's 1,000 words a month. Writer and Studio only raise the monthly word allowance.

Tools

rewrite_text rewrites a draft so it reads like a person wrote it. Send the draft as text (400 words at most). Intensity is light, natural, or voice. Tone is casual, professional, or concise. Language can be English, Dutch, Spanish, French, or German. Locked terms are names and facts that must stay unchanged.

get_usage reads the plan, the words used this month, the monthly cap, the words left, the period, and when the count resets.

list_recent_rewrites reads the last five saved rewrites: an id, the time, and the first 140 characters. The list is empty when the account does not keep drafts.

Sign-in

The client signs in with OAuth. Plainvoice is the authorization server. You approve the app on this site, and the app receives a token that can rewrite with your words and read your plan and usage. It cannot change your plan, billing, or settings, and it cannot delete your text. Disconnect an app from the account page.

Limits

Limits are counted per account in the database, not per caller address. rewrite_text can run 30 times a UTC day on Free, and 200 times on Writer or Studio. get_usage can run 100 times a day. list_recent_rewrites can run 50 times a day. The monthly word cap still applies. Plainvoice reserves the draft's words before the model runs and returns them if the rewrite fails. A rewrite counts the words in the draft.

Privacy

Plainvoice does not train on your text. When a rewrite is sent to the model, xAI keeps that API request for about 30 days for abuse review. Zero data retention is not turned on. The same note is on the privacy page.