Graphtr
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For developers and agents

Give your agent a design tool

Relay exposes Graphtr over the Model Context Protocol. Point an MCP client at it with an API key and your agent gets four tools: it can list templates, fill one with copy, render a chart and check its own quota. The design that comes back is the same file Studio would have produced.

Read the quickstartSee the docs
Add the server
claude mcp add --transport http graphtr \  https://www.graphtr.com/api/mcp \  --header "Authorization: Bearer gt_live_..."
What the agent sends
{  "tool": "create_design",  "arguments": {    "prompt": "launch poster for a coffee subscription",    "preset": "instagram",    "fill": { "headline": "First bag free", "cta": "Subscribe" }  }}

How it works

Three steps with Relay

  1. 1

    Add the server

    One command in your MCP client, with an API key as a bearer header. Nothing to install and nothing to host.

  2. 2

    The agent picks a template

    list_templates returns ids, formats, dimensions and which slots accept copy, so the model can choose on more than a name.

  3. 3

    It gets a finished design

    create_design returns the rendered image. The agent can look at what it made and try again.

What it does

Inside Relay

All products

list_templates

Browse the library by category, format or query. Returns which slots each template accepts and whether the caller's plan can use it.

create_design

A prompt or a template id plus slot copy, returning a rendered PNG the model can actually see.

render_chart

Rows of labels and values in, a designed chart out. The same engine Charts uses.

get_usage

Plan, quota used and reset date, so an agent can pace itself rather than discovering a limit by hitting it.

FAQ

Questions about Relay

Which MCP clients work?
Anything that speaks Model Context Protocol over HTTP, including Claude Code and Claude Desktop. Relay is a standard MCP server with no client-specific behaviour.
How does authentication work?
An API key sent as a bearer header. Keys are created in your account, scoped, and revocable at any time.
Does the agent see the design it made?
Yes. create_design returns an image block, so a vision-capable model can look at the result and decide whether to adjust it.

Your ideas deserve better than a blank page

Open the editor and see for yourself. Nothing to install, nothing to cancel, and your first design is about five minutes away.

Start designing now