Sandbox
Sandbox is a fully deployed, isolated Multiply environment running on Polygon mainnet against fake USDC and fake outcome tokens. Build and test your integration end-to-end with no funds at risk.
Sandbox is a separate deployed environment with its own base URL, its own API keys, its own database, and its own vault contract pulling against fake USDC. It runs on Polygon mainnet, so every transaction behaves exactly like it will in production — signatures, gas, confirmations, events — but the tokens it settles are worthless outside of Multiply. Use it to drive the full position lifecycle end-to-end before touching real money.
For the point-by-point comparison with production, see Environments. For the canonical contract addresses, see Contract Addresses.
Getting access
Sandbox API keys are issued by the Dimes team. To request one:
Go to dimes.fi and use the Telegram link in the site footer to contact us.
Tell us you want sandbox access and share the wallet address(es) you intend to test with, plus the partner name you want the key issued under.
We will reply with:
A
dm_sbx_skey_...API key scoped to sandbox.A starting balance of fake USDC minted directly to the wallet addresses you gave us.
Sandbox contract addresses are published on Contract Addresses — wire them into your allowlist ahead of time.
If you burn through your fake USDC mid-test, ping us again and we will top you up.
Pointing your integration at sandbox
Swap api.dimes.fi for api-sandbox.dimes.fi everywhere — REST calls, WebSocket connections, any base URL you have pinned in config. Everything else is identical to production.
REST base URL
https://api-sandbox.dimes.fi/v1
WebSocket URL
wss://api-sandbox.dimes.fi/v1/ws/prediction-markets/positions
Swagger UI
https://api-sandbox.dimes.fi/v1/customer-docs
API key prefix
dm_sbx_skey_...
Resource IDs
contain sdx (e.g. dm_pos_sdx_...) so sandbox data is obvious on sight
From there, follow the Quickstart — every step works in sandbox by substituting the base URL and key.
Working reference frontend:
dimes-fi/dimes-demo-uiis a React + Vite app that exercises the entire integration path against sandbox — auth, markets, quotes, USDC approval,createPosition, signature verification, and position monitoring. Fork it, runnpm run dev, and trace the calls.
Sandbox vs production
USDC
Real USDC.e on Polygon
Fake USDC minted on request
Outcome tokens
Real Polymarket CTF
Fake CTF deployed by Dimes
Vault
Production deployment
Separate deployment (different address)
Market data
Live Polymarket markets
Live Polymarket markets (read-only)
Funds at risk
Yes
No
SLA
Production-grade
Best-effort — may reset or pause for maintenance
Sandbox runs the same LeveragedPredictionVaultV1 contract as production. Every REST endpoint, WebSocket event, response shape, and error code is identical — if it works in sandbox, it works in production. The only things that change between environments are the contract addresses (listed in Contract Addresses) and the API key.
For the full matrix, see Environments.
What sandbox is not
Not a staging mirror of production data. Sandbox has its own database. Positions, partners, and API keys from production are not visible in sandbox and vice versa. Sandbox and production API keys are not interchangeable — the wrong key against the wrong base URL is rejected.
Not production. No SLA. Do not build customer-facing demos or production workloads on top of sandbox. We may reset or redeploy on short notice.
Not a faucet. Sandbox USDC is minted by the Dimes team on request and has no off-ramp. It cannot be converted to real USDC.
Not shared. Your sandbox API key only sees positions opened with itself. Other customers' sandbox data is invisible to you.
Need help?
Find us on the Telegram link at dimes.fi. Tell us you are working against sandbox and include your partner name and the wallet addresses you need funded.
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