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AI that finishes the job, built into your app

The AI backend your app is missing. One call, real work done, no infra.

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The most user-friendly way to build AI workflows

Configure

Instruction

Generate a PDF report for customer {{customer_id}}
ModelClaude Haiku
Thinking
Run report for customer ID #4292

Executing Agent

Done. I've compiled the data and generated your PDF report.

Add the logo to the cover page

$ curl -X POST api.sunnyday.run/v1/invoke

> -d '{"customer_id": "4292"}'

> {"status": "complete", "pdf_url": "https://api.sunnyday.run/reports/..."}

No infra. No engineering degree.

No servers, no queues, no orchestration code. Sunnyday hosts, runs, and scales your agents

Run report for customer ID #4292

Executing Agent

Done. I've compiled the data and generated your PDF report.

Add the logo to the cover page

Working...

Chat with it until it works

The same loop you built your app with, pointed at the work itself.

Generate Q2 board deck

Executing Agent

  • Reading Skills...
  • Thinking...
  • Pulling sales data (BigQuery)...
  • Thinking...
  • Building deck slides...

Give it the whole job, not just a step

Agents plan, do, and check multi-step work using your files and Skills.

Model Selector

Deepseek Pro
GLM Latest
Qwen Max
MiniMax
Claude Opus

All the power, a fraction of the price

Frontier-quality results without the per-token bill shock.

Integrate Agent

API ENDPOINT

https://api.sunnyday.run/v1/invoke/cfq70h0b7nb4iqt72u7a19aa

Work with your Apps

Lovable Replit Vercel V0

One endpoint. A whole agent behind it.

Your app calls one URL. A full agent runs the job and returns the result.

Built on solid ground

OverviewConfigureRuns Publish
Agent Instructions Refine
Generate a personalized PDF report for customer account activity. Include:
  • Monthly spend summary
  • Top merchant categories
  • Transaction history
ModelPerformance
Web Search
Workbench
Run report for customer ID #4292

Executing Agent

Done. I've compiled the data and generated your PDF report.

Generated Artifact

monthly_summary_4292.pdf
Command agent...

Open Source

Sunnyday runs on Axle, our open-source agent engine. The code that executes your tasks is public, not a black box: read it, run it, build on it.

View on GitHub

By people who care

Twenty years of shipping software, one current obsession: agents that work every time, not just in the demo.

Behind the scenes

Everything an Agent needs

Build

From idea to working agent in one sitting

  • Write it like a brief, get a working agent
  • Shape it in the workbench until it nails the job
  • Add variables so one agent handles a hundred cases
  • Every change is versioned, so experiment without fear
  • Feed it your files and it works like it's read them

Run

Real work needs a real computer

  • Every task gets its own fresh computer, not a chat window
  • It plans first, checks its work, and retries until it's right
  • Delivers real files: PDFs, Word docs, spreadsheets
  • Show it anything — it reads images and documents
  • Watch it think live, and jump in when you have notes

Ship

Wire it in and walk away

  • Fire it from your app, a schedule, or a single click
  • Every run graded pass, partial, or fail. No silent failures
  • Full transcripts, for when you want receipts
  • See what every run costs, down to the token
  • Point it at GitHub and it runs on push, tag, or PR