Plans & Limits
Feature comparison, render limits, and what each plan includes.
No sign-up needed to get started. GET requests work without authentication – up to 200 renders per month per IP. Sign up for free to unlock API keys and 1,337 renders per month.
Feature comparison
| Feature | Free$0 | Pro$29/mo | Business$99/mo |
|---|---|---|---|
| Renders | 1,337 / mo | 100,000 / mo | 1,000,000 / mo |
| Output | PNG, SVG | PNG, SVG | PNG, SVG |
| API keys Authenticate POST requests for higher limits and customization options. | 1 key | 3 keys | 10 keys |
| MCP server Connect AI agents via Model Context Protocol for tool-based chart generation. | |||
| Custom themes Create fully custom themes with your own typography, spacing, and palette. | |||
| Priority support |
Feature details
API keys – Unauthenticated GET requests are limited to 200 renders per month per IP. Sign up for a free account to get 1 API key and 1,337 renders per month. Pro includes 3 keys; Business supports 10 keys. See Authentication.
Custom themes – Create fully custom themes with your own typography, spacing, and palette. Available on Pro and Business. See all theme properties.
Rate limits
When you exceed your monthly render limit, the API returns 429 Too Many Requests:
{ "error": "Monthly render limit exceeded. Upgrade at szum.io/dashboard." }Limits reset on the 1st of each month (UTC).
Need more?
Need unlimited renders, an SLA, or on-prem deployment? Let's talk.