Manage everything through the REST API — or let an AI agent do it via the MCP Server.
Winnr's API covers account, domains, email users, warming, inbox, export, and jobs (plus team users, templates, affiliate, and more). Full OpenAPI spec at app.winnr.app/docs. This is a high-level tour of what each resource does.
Startup gets 300 requests per minute. Enterprise gets 500. Limits apply per account across all tokens combined. Exceeding returns 429. Winnr sends standard rate-limit headers on every response.
The Winnr MCP server exposes 55 tools that let Claude (web, mobile and desktop), ChatGPT, Cursor and Claude Code manage your cold email infrastructure through natural language. Add https://mcp.winnr.app/mcp as a connector and sign in. Set up takes about 30 seconds.
Create API tokens from Settings → API Keys. Assign read or read/write scope. Tokens start with wnr_ and are shown once — copy immediately. Revoke any time.
Winnr exposes a REST API for programmatic domain, mailbox, warming, and inbox management. Full OpenAPI spec available. Both Startup and Enterprise plans include API access; only rate limits differ.
Register HTTPS endpoints to receive signed event notifications from Winnr, including message.relayed events that map your Message-ID to the one the upstream email provider assigns. Verify signatures, handle retries, and look up mappings via GET /v1/messages/lookup.