WritingmateWritingmate

OpenAI-compatible API & MCP for agents

Use your Writingmate plan in the agent tools you already run.

An OpenRouter alternative on a flat plan. One key connects Claude Code, Cursor, and any OpenAI-compatible tool to Writingmate — 200+ models, same limits, no per-token pricing and no second subscription.

Works in the tools you already use
200+ models with one key
No extra cost beyond your plan
writingmate provider

Base URL

https://writingmate.ai/api/openai/v1
{
  "provider": "writingmate",
  "api": "openai-compatible",
  "baseURL": "https://writingmate.ai/api/openai/v1",
  "model": "google/gemini-2.5-flash"
}

Included in your plan

openai/gpt-5.5Included
anthropic/claude-opus-4.8Included
google/gemini-3.5-flashIncluded
x-ai/grok-4.3Included

See it in action

From link to live tools in under a minute

A quick walkthrough: copy your MCP link, add it to your AI tool, sign in once, then just ask.

Quick setup

Connected in minutes

Create your key

One click in Profile Settings → API Keys. That's the only secret you need.

Paste one URL

Point your tool at https://writingmate.ai/api/openai/v1 and you're connected.

Pick your model

Choose from 200+ models, like google/gemini-2.5-flash. Switch anytime.

Give your agent tools

One MCP link — https://writingmate.ai/api/mcp — adds chat, images, and video.

Works with your stack

Your tools already know how to talk to Writingmate.

If a tool accepts a custom OpenAI-compatible provider or an MCP server, it works. Nothing to install, nothing to rebuild.

OpenAI SDKs
Set baseURL and apiKey
Standards-compatible
OpenAI-compatible API
Vercel AI SDK
Use @ai-sdk/openai-compatible
Documented config
OpenAI-compatible API
Continue
Set provider, apiBase, apiKey, model
Documented config
OpenAI-compatible API
Aider
Set OPENAI_API_BASE and model
Documented config
OpenAI-compatible API
OpenCode / OpenClaw-style clients
Add Writingmate as a custom provider
Configurable
OpenAI-compatible API
MCP hosts
Connect https://writingmate.ai/api/mcp
Standards endpoint
MCP

What you get

Your plan, working harder

Copy and paste

Everything you need to connect

Most tools only ask for a base URL, a key, and a model name. Here they are.

OpenAI base URLhttps://writingmate.ai/api/openai/v1
MCP endpointhttps://writingmate.ai/api/mcp
Auth headerAuthorization: Bearer YOUR_WRITINGMATE_DEVELOPER_KEY
Workspace headerx-writingmate-workspace: WORKSPACE_ID

Frequently Asked Questions

Still have questions? Email us at hello@writingmate.ai

Ready when you are

Your plan. Every tool. One key.