Charts & dashboards for AI agents & automations

A tiny JSON spec in → a finished, retina-quality chart out. Native SVG in milliseconds, no headless browser, deterministic — same spec, same chart, every time — and 100% local via MCP.

Install the MCP Get an API key

Free with your agent — the MCP is free forever, unlimited. Plans only exist for hosted chart URLs.

Executive dashboard — 8 tiles (KPIs, gauge, donut, area, heatmap, funnel, waterfall) rendered live by the SlickFast API from the spec on the left

Live — this image is rendered by api.slickfast.com from that exact spec. The URL is the chart; rendered once, then served from the CDN edge.

1,546 chars of JSON → the whole dashboard above, in one call. See the spec

{"type":"dashboard","title":"ACME SaaS — Executive Snapshot · rendered by api.slickfast.com in one call","background":"#0f172a","palette":"Vibrant","layout":{"cols":4,"tileHeight":230},"tiles":[{"chart":{"type":"kpi","label":"MRR","value":48250,"valuePrefix":"$","delta":12.4,"sparkline":[31,34,33,38,41,44,48]}},{"chart":{"type":"kpi","label":"Churn","value":2.1,"valueUnit":"%","delta":-0.6,"deltaGoodWhen":"down"}},{"chart":{"type":"gauge","title":"NPS","value":62,"max":100}},{"chart":{"type":"donut","title":"Revenue mix","data":{"labels":["Pro","Scale","Services"],"series":[{"values":[58,31,11]}]},"valueUnit":"%"}},{"chart":{"type":"area","title":"Revenue trend ($k)","data":{"labels":["Jan","Feb","Mar","Apr","May","Jun"],"series":[{"name":"Revenue","values":[31,34,38,41,44,48]}]}},"span":[2,1]},{"chart":{"type":"heatmap","title":"Signups by day","columns":["Mon","Tue","Wed","Thu","Fri","Sat","Sun"],"rows":["W1","W2","W3","W4"],"values":[[12,18,14,22,30,8,5],[15,21,19,27,34,9,6],[18,25,22,31,41,12,8],[24,29,27,38,52,15,11]]},"span":[2,1]},{"chart":{"type":"funnel","title":"Signup → paid","stages":[{"label":"Visitors","value":42000},{"label":"Signups","value":6100},{"label":"Activated","value":3400},{"label":"Paid","value":940}]},"span":[2,1]},{"chart":{"type":"waterfall","title":"Cash flow ($k)","start":120,"steps":[{"label":"Revenue","value":48},{"label":"Infra","value":-6},{"label":"Payroll","value":-38},{"label":"Marketing","value":-11},{"label":"Other","value":-4}],"totalLabel":"End Q2"},"span":[2,1]}]}

Why SlickFast

Agents burn tokens drawing charts. Stop paying for that.

Every number below is the point. (And yes — these cards are SlickFast output too.)

Stat card: ~40 output tokens for a finished chart

Hand-writing SVG or matplotlib code: 2,000+ tokens, then the retries when it doesn't render.

Stat card: 0 MB of headless browser shipped

Most chart-to-image pipelines quietly ship ~300 MB of Puppeteer. SlickFast renders pure in-memory.

Stat card: 1 API call for an 8-tile dashboard

The alternative: 8 separate renders plus layout math. A dashboard here is one tool call.

Stat card: 0 bytes of data leaving your machine over MCP

The MCP renders and rasterizes on your machine. Nothing is sent anywhere.

A spec is nearly free. A few dozen tokens, and {type, data} alone is a finished, well-designed chart.
Changes are one-field edits. Swap bar → line, change a palette, resize for a slide — re-render. No code rewrites.
Deterministic. Same spec, same chart, every time. No randomness, no browser drift — cacheable, testable, reproducible.
Never throws garbage at the model. Empty data → a clean graceful frame. A real mistake → a loud error listing the valid options, so the agent self-corrects in one step.
Native SVG, vector-first. A few KB, crisp at any scale — or retina PNG on demand.
47 chart & information-design types. Bar to gantt to tierlist — plus whole multi-chart dashboards tiled into one image, with tiles spanning columns and rows (wide 2×1, tall 1×2, hero 2×2) in one grid.

Gallery

All 47 types. Every image is engine output.

Nothing below is a mockup — each board is a single SlickFast render: one spec, one call, many charts tiled into one image. Tiles span columns and rows (wide, tall, hero-sized), so a board mixes big charts with small stats. Click any image to view it full size.

One field changes the whole look: `palette`

Single charts, straight out of the engine. 6 flat palettes and 12 nested themes are built in — name one in the spec and the chart restyles itself, background to legend.

Donut chart in the Retro Editorial palette on a cream background

Retro Editorial — donut

Stacked area chart in the Nordic Earth palette on warm paper

Nordic Earth — stacked area

Smooth line chart in the Cyberpunk Glow theme on near-black

Cyberpunk Glow — smooth line

Waffle chart in the Sorbet Pastel palette on white

Sorbet Pastel — waffle

Whole dashboards — one spec, one call, one image

GRID-OPS dark cyberpunk operations dashboard

GRID-OPS — dark ops board, Cyberpunk palette, one render

Systems bridge status dashboard with row-spanning tiles

Bridge status — row-spanning tiles in the same grid

6-column extreme grid dashboard with 17 tiles: KPI row, gauge row, trend charts, bar and leaderboard

6-column extreme grid — 17 tiles, one render: KPIs · gauges · trends · leaderboard

FitPulse portrait daily summary board: steps, calories, trend, goal gauge, sleep ring

Portrait board — phone-shaped daily summary

Apollo Mission Control themed dashboard: KPIs, moonwalk hours bar, crew donut, NASA budget line, lunar-stay leaderboard

Apollo — Mission Control — themed board, real program data

Nested composition board: pie, horizontal bars, and full-width pie-of-pie drill-down tiles

Nested composition — pie-of-pie drill-downs as full-width tiles

SaaS monthly review — wide + tall tiles mixed in one grid

Sales pipeline

Any shape, one field: `preset`

The same chart, re-laid-out by naming a preset — no layout math. Share Card (1.91:1) for Slack/X/LinkedIn link previews, Wide 16:9 for slides, Square and Portrait for feeds, Tall 9:16 for Stories.

Bar chart at Share Card 1.91:1 aspect ratio

Share Card — link previews

The same bar chart at square 1:1 aspect ratio

Square — feeds

The same bar chart at tall 9:16 aspect ratio

Tall — Stories

Every type, by family

Single-stat chart family board: KPI, gauge, ring, callout, progress, bullet

Single-stat family · Pastel — kpi · gauge · ring · callout · progress · bullet

Comparison chart family board: bar, grouped, stacked, diverging, lollipop

Comparison family · Vibrant — bar · grouped · stacked · diverging · lollipop

Trend chart family board: line, smooth, area, stacked area, slope, difference

Trend family · Cyberpunk Glow — line · area · slope · difference

Part-to-whole family board: pie, donut, pie-of-pie, waffle, pyramid, funnel

Part-to-whole family · Analogous Shift — pie · donut · pie-of-pie · waffle · funnel

Grid and structure family board: heatmap, matrix, table, calendar, quadrant

Grid & structure family · Clean Corporate — heatmap · matrix · table · calendar · quadrant

Process and planning family board: gantt, swimlane, steps, timeline, waterfall

Process & planning family · Cyberpunk — gantt · swimlane · steps · timeline · waterfall

Install

Two ways in: local MCP, or one URL.

The MCP runs on your machine via npx — no clone, no build, nothing leaves your machine. The hosted API turns a spec into a public image URL.

MCP — 100% local

Claude Desktop · Claude Code · claude.ai — add to your MCP config, restart

{
  "mcpServers": {
    "slickfast": {
      "command": "npx",
      "args": ["-y", "@slickfast/mcp"]
    }
  }
}

The package is @slickfast/mcp on npm — a self-contained bundle that npx fetches on first run. No clone, no build step, no global install; needs only Node.js. Renders 100% on your machine.

API — the URL is the chart

Bearer key from any plan · SVG & PNG · CDN-cached

SPEC='{"type":"bar","data":{"labels":["Q1","Q2","Q3"],
       "series":[{"values":[12,19,8]}]}}'

curl "https://api.slickfast.com/chart.png?spec=$(jq -rn --arg s "$SPEC" '$s|@uri')" \
  -H "Authorization: Bearer sf_your_key" \
  --output chart.png

Keys start with sf_ and come from any plan (Free included). Send via Authorization: Bearer, X-API-Key, or ?key= for embeddable URLs. /chart.svg returns vector instead.

Then ask your agent to "render a bar chart of last quarter's revenue" or "build a dashboard with an MRR tile, a signups funnel, and a usage heatmap."

Pricing

Simple plans, metered in renders.

A render is one chart or one whole dashboard. CDN-cached — one render can serve any number of views.

Using SlickFast with your agent? That's free.

The MCP runs on your machine — free forever, unlimited renders, all 47 types, no account, no card, nothing sent anywhere. The plans below are only for the hosted API: public chart URLs rendered and cached by api.slickfast.com, for embedding in Slack, email, or a webpage. If you never need a public URL, you never need a plan.

🏷 Early Supporter: 50% off — for life. Use code SLICKFASTROCKS at checkout.

Free

$0/mo

250 renders/mo

All 47 types + dashboards
SVG & PNG output
Shareable chart URLs, CDN-cached
No card required

Start free

Pro

$29/mo

10,000 renders/mo

Everything in Free
Room for real agent workloads
Embed anywhere — Slack, email, docs

Get Pro

Scale

$79/mo

50,000 renders/mo

Everything in Pro
Built for fleets of agents

Get Scale

Need more than 50k renders, or a commercial license for the engine? Write to feedback@slickfast.com.

Roadmap

What's next.

NEXT UP

Live Charts

One chart URL that re-renders with fresh data every time it's viewed. Embed it in docs, wikis, dashboards, READMEs — anywhere an image loads, it's always current.

SOON

Charts for Email

A chart in the inbox that's current at every open, not a stale screenshot — weekly-numbers emails, usage digests, newsletter data-viz.

SOON

Playground

Edit a spec in the browser and watch the chart re-render as you type.

ONGOING

More types, palettes & board layouts

The engine grows steadily — 47 types today, and the tiling system keeps getting more expressive.

Charts & dashboards for AI agents & automations

Agents burn tokens drawing charts. Stop paying for that.

All 47 types. Every image is engine output.

One field changes the whole look: `palette`

Whole dashboards — one spec, one call, one image

Any shape, one field: `preset`

Every type, by family

Two ways in: local MCP, or one URL.

MCP — 100% local

API — the URL is the chart

Simple plans, metered in renders.

Using SlickFast with your agent? That's free.

Free

Pro

Scale

Free and open source.

What's next.

One JSON spec. That's the whole API.

Charts & dashboards for AI agents & automations

Agents burn tokens drawing charts. Stop paying for that.

All 47 types. Every image is engine output.

One field changes the whole look: palette

Whole dashboards — one spec, one call, one image

Any shape, one field: preset

Every type, by family

Two ways in: local MCP, or one URL.

MCP — 100% local

API — the URL is the chart

Simple plans, metered in renders.

Using SlickFast with your agent? That's free.

Free

Pro

Scale

Free and open source.

What's next.

One JSON spec. That's the whole API.

One field changes the whole look: `palette`

Any shape, one field: `preset`