Docs

A chart URL, part by part.

Everything a chart URL can say, how to sign one, and the API and MCP server around it. Start with the URL specification.

https://c.renderchart.com/?Endpoint key=rc_pub_live_7Hq2mX9pLk4vN8sT1wEa 1Key &type=bar 2Type &x=Mon,Tue,Wed&y=20,30,40 3Data &title=Signups 4Title

Chart URLs.

URL specification

Every parameter, limit, chart type, theme and error image.

Signing

Sign URLs on your server so they render without a watermark, with code for PHP, Node and Python.

Short URLs

Hide your key and data behind /s/, and keep the same URL live on Pro.

Examples

Charts for email reports, Google Sheets, Slack, Notion, READMEs and AI agents.

AI assistants.

MCP server

Connect Claude, ChatGPT, Claude Code or Cursor so they make charts for you.

REST API.

REST API

Short charts, usage and signing over HTTP with your secret key.

API reference

Every endpoint, parameter and response, from the OpenAPI description.