Capci
Give Your Agent a Pen.
The Diagramming MCP Server for Your Agent, and the Visual Studio Behind It. Connect one endpoint and your agent gets a clean set of tools for architecture diagrams, flowcharts, sequence diagrams, charts and on-brand visuals, planned by the model, generated on our side, returned as a real image.
Agent Session
mcp.capci.app/mcp · x-api-key
Diagram our checkout: client → gateway → orders → payments → DB.
→ create_diagram running
kind: architecture · style: structured · theme: dark
Durable id · refine, re-theme and re-export across turns
What Your Agent Can Draw
Architecture & System Diagrams
Describe a system in plain language ("client → gateway → orders → payments → DB") and get a clean, legible architecture diagram with 200+ official GCP, AWS and Azure cloud icons, colour-coded per provider.
One MCP Endpoint, Every Agent
Capci is a remote MCP server over Streamable HTTP. Any host that speaks the protocol (Claude Code, Claude Desktop, VS Code, Antigravity, Agent SDKs) picks up the drawing tools instantly. No install, no local process.
Durable, Refinable Diagrams
Every diagram gets a stable id your agent can refine, re-theme and re-export across turns. Add a node, swap the theme, resize; the rest stays put. Iterate, don't regenerate.
Flowcharts, Sequence, ER & Charts
Flowcharts, sequence, class, ER, mindmaps and gantt, plus bar, line, donut and KPI charts. Hand the agent's numbers straight to a clean visual, no spreadsheet round-trip.
On-Brand by Default
Set a brand profile once (colours, mark, style) and every diagram, chart and post comes back presentation-ready. Or pass unbranded for a clean frame when you need one.
Posts, Code Cards, Logos & GIFs
Turn a one-line prompt into a polished social or marketing image, a syntax-highlighted code card, a logo mark, or an animated flow as a shareable GIF. The same tools, wherever your agent already works.
One Endpoint. Every MCP Host.
No package to install and no local process to babysit. Point your agent at the endpoint, add your key, and the drawing tools appear.
Get a Key
Sign in at capci.app → Account → Developer → generate an API key. Free plans get a trial run out of the box.
Add the Server
Register mcp.capci.app/mcp as an HTTP MCP server in your agent, with your key in the x-api-key header. Nothing to install locally.
Ask It to Draw
The model plans the structure; the drawing is done on our side, so output is consistent, legible and repeatable, not a fresh hallucination each call.
Refine & Export
Pass the diagram id back with a change and it edits in place. Export a real image (PNG or GIF) the agent can post or attach directly.
# works the same in any MCP host that accepts an auth header claude mcp add --transport http capci https://mcp.capci.app/mcp \ --header "x-api-key: <your-capci-key>" # then just talk to your agent: "Draw the sequence diagram for our OAuth login and export it as a PNG."
Why Route Diagrams Through Capci
Diagrams have an identity.
Every diagram gets a stable id your agent can refine, re-theme and re-export across turns. State that survives the conversation, not a one-shot picture.
The same prompt draws the same diagram.
The model plans structure; the drawing is done on our side, so output is consistent, legible and repeatable, not a fresh hallucination each call.
On-brand by default.
Set your colours and mark once and every artifact your agent produces is presentation-ready, or strip branding per call when you need a clean frame.
Remote, stateless, no install.
A single hosted endpoint over Streamable HTTP. No npm package, no local server, no OAuth dance. One URL and a key, portable across every host you use.
From One-Off Diagrams to Production Pipelines
Agent & App Builders
Give any agent the ability to draw. One endpoint and a key, and every conversation can end in a diagram, chart or on-brand visual, generated, refined and exported without leaving the agent.
DevRel & Technical Creators
Ship architecture diagrams, code cards and social visuals at content speed: on-brand and repeatable across a whole series.
Engineering Teams
Turn design discussions into durable diagrams your agent can keep editing across turns (architecture, sequence, ER) without a canvas tool.
Solo Founders & Marketers
A full visual studio in a browser tab: posts, infographics, logos and animations. No designer, no design tool, no learning curve.
Start Free. Scale by the Month.
API and MCP calls draw from one monthly quota across every tool. Exhaust it and you get a clear, visible signal, never a silent failure in your pipeline.
₹0 to kick the tires
A bounded set of calls from the free pool, shared with the web app. Enough to wire it into your agent and see real output.
₹599 · $19 / month
A real recurring quota across diagrams, charts, posts and refines. Unlimited on the web app, metered on the API / MCP channel.
₹2,499 · $49 / month
Built for production agents: higher volume, saved render defaults, and the headroom to put diagramming on a real workflow.
Pricing shown for reference · confirm current tiers at capci.app/pricing
Your Agent Can Already Reason. Now It Can Draw.
Connect once and every conversation can end in a diagram, a chart or an on-brand visual, generated, refined and exported without leaving the agent.