Intelligence
Chat · Research
3Stone API · V1 available
Build with 3Stone.
One API for intelligence, creation and real work.
One platform
One API.
3Stone’s capabilities.
Move from understanding to finished output without maintaining a separate provider relationship for every kind of work.
Understand
Files · Images
Create
Images · Video · Music
Work
PowerPoint · Excel · Documents
Build
Interactive tools
3Stone intelligence
The right intelligence for the task.
Choose 3stone-auto—or omit the model—and 3Stone routes each request by complexity, latency, quality and availability. Upstream providers stay behind a stable 3Stone contract.
3Stone Auto
3Stone chooses the certified route for each task.
Fast
Low-latency intelligence for straightforward work.
Balanced
General-purpose quality and cost balance.
Max
The strongest certified route for demanding work.
One identity
Same key.
Different work.
A single 3stone_sk_… key, prepaid balance, request log and ledger spans every production capability.
3stone_sk_…ResearchImageVideoPresentationSpreadsheet
curl https://one.3stoneai.com/v1/chat \
-H "Authorization: Bearer $THREESTONE_API_KEY" \
-H "Idempotency-Key: demo-chat-001" \
-H "Content-Type: application/json" \
-d '{"model":"3stone-auto","input":"Explain exactly-once billing simply."}'curl https://one.3stoneai.com/v1/images \
-H "Authorization: Bearer $THREESTONE_API_KEY" \
-H "Idempotency-Key: demo-image-001" \
-H "Content-Type: application/json" \
-d '{"prompt":"A quiet glasshouse library at blue hour"}'curl https://one.3stoneai.com/v1/video \
-H "Authorization: Bearer $THREESTONE_API_KEY" \
-H "Idempotency-Key: demo-video-001" \
-H "Content-Type: application/json" \
-d '{"prompt":"Subtle natural motion, locked camera, no text","input_image":"BASE64_JPEG","media_type":"image/jpeg","ratio":"1280:720"}'Real 3Stone output
From one request
to something useful.
Original audioR&B · 3Stone AI
Interactive artifactBudget calculatorOpen live example ↗
Inside your 3Stone account
Developer Mode.
Fund, create keys, set controls, inspect usage and read logs without leaving the product you already use.
API balance$24.80
Recent requests
POST /v1/chat3stone-autocompleted1.8 sPOST /v1/imagesimagecompleted12.4 sPOST /v1/presentationsartifactcompletedreadyA privacy-safe presentation of the current production Developer Mode layout and controls.
Usage pricing
Pay only for what you use.
API funding is separate from consumer plans. Start with a $10 prepaid balance; every request reserves a bounded amount, settles measured usage and releases the rest.
- No paid consumer subscription required
- One balance across capabilities
- Optional auto-reload
- Daily spending controls
Built for products
More range.
Less integration work.
AI products
Ground product experiences in chat, research and file understanding.
Creative applications
Create original images, short video and music through durable jobs.
Productivity software
Deliver editable presentations, spreadsheets and documents.
Interactive products
Return functioning calculator and tracker artifacts—not just descriptions.
Security & control
Designed for production boundaries.
Hashed, revocable API keysTenant isolationIdempotent executionRate limitingPrivate artifactsRequest logsPrepaid spending controlsDaily limits