Developers

Add in-voice rewrites to your own product.

Submit a draft, poll the job, get back a send-ready reply in your own voice. One key for REST and MCP, and only succeeded rewrites count.

REST APIMCP serverShared Pro/API quota
REST API reference →MCP setupGet your API key
Why integrate

REST API: build it into your product

  • Two-endpoint contract: submit a draft, poll the job. Plain JSON, no SDK required (an official TypeScript SDK exists if you want one).
  • Only succeeded rewrites consume credits. Failed jobs, rejected requests, and polling are free.
  • Safe retries with Idempotency-Key, documented rate-limit headers, and a published OpenAPI spec.

MCP server: give it to your agent

  • Works inside Claude Code, Claude Desktop, Cursor, Codex, and any MCP host, no integration code.
  • Install in one step: a Cursor deep link or a single claude mcp add command.
  • Two simple tools (rewrite_email, get_rewrite_result) your agent can call mid-workflow.
  • Same key and same balance as the REST API and the web workspace.
Evaluate before you pay

Try the engine in the web workspace first. A trial code unlocks 3 trial rewrites, no card. It is the same engine the API calls, so you can evaluate the output before choosing Pro/API.

Try it in the workspace →Unlock the API · NZ$19.90/mo
Two ways to integrate

REST API

Call the async rewrite API from your own product or backend: submit a draft, poll the job, and return a send-ready reply.

MCP server

Connect Reply In My Voice as a tool inside Claude Code, Claude Desktop, Codex, Cursor, or any MCP host.

1

Get a key

Create one shared key for REST API and MCP. Get your API key.

2

Submit a draft

Follow the API quickstart to create an async rewrite job.

3

Poll the job

Read the job body until it is succeeded, then use the returned rewrittenText in your product.

Developer facts
KeyOne API key works for both paths
BalanceWebsite and API rewrites share one balance
PlanPro/API NZ$19.90/mo
Quota90 rewrites/month shared across web + API
Unit price≈ NZ$0.22 / rewrite
AccessNo free API tier
Rate limit60 requests/min per key
MeteringSucceeded rewrites consume quota; failed jobs and polling do not.
ReferenceOpenAPI specification
REST API and MCP access are included with Pro/API. See Pro/API pricing.
API terms · Acceptable use · Data handling
Developers | Reply In My Voice