Sim

Powered by @dune.

Realtime, multichain end-to-end developer platform. APIs and Indexing across 60+ chains.

[Sim @DuneSim]

Sim is sunsetting on August 1, 2026. New signups are disabled as of today.

Thank you to every team that built on Sim.

Existing users: please check your email inbox for next steps.

[Sim @DuneSim]

Get access https://t.co/XtgZCH7PCP

[Sim @DuneSim]

.@Layer3 used to manage dozens of separate APIs to verify onchain transactions across chains.

After switching to Sim by @dune: one API key. @Solana query times went from up to 30 seconds → under 500ms. 50x improvement. ⚡

The team migrated in 48 hours.

"We replaced hundreds of requests with a single request to Sim." — Lars Karbo, Engineering at Layer3

[Sim @DuneSim]

@Dune Get access https://t.co/XtgZCH7PCP

[Sim @DuneSim]

A DeFi power user may have positions across 10+ protocols on 5+ chains.

Without the right data layer, building a unified portfolio view means integrating each protocol separately.

Sim's DeFi Positions API returns all of it — lending, LP, yield vaults — in a single call, with USD values and per-chain aggregations included. 🗂️

[Sim @DuneSim]

Get access https://t.co/L2FEfx3bZz

[Sim @DuneSim]

Your users want to see their DeFi positions… all of them.

Not just token balances, actual positions. LP exposure. Lending collateral. Yield vault shares. Pending rewards.

Most wallet developers either skip DeFi positions entirely or spend months indexing individual protocols.

Sim by @dune gives you all of it in one endpoint. Across 60+ chains and 100+ protocols.

[Sim @DuneSim]

Get access 👇
https://t.co/qCkmd6vwKr

[Sim @DuneSim]

Sim API now supports @Polymarket positions 🎯

✅ Standard outcome-share positions (standard and negrisk)
✅ Live resolution tracking
✅ Per-share payout enrichment

All queryable in real-time alongside wallet DeFi positions, balances, and more.

[Sim @DuneSim]

@layer3 @Dune Read more about how @layer3 uses Sim in production https://t.co/fecQNbiNvE

[Sim @DuneSim]

Sim is built for production.

Reorg-aware data. Structured responses with metadata your app can actually use.

When you're running high RPS across multiple chains, reliability isn't optional. It's the product. ⚙️

[Sim @DuneSim]

Explore Sim https://t.co/MfUWcGHTk3

[Sim @DuneSim]

Bad onchain data doesn't always fail loudly. It just shows users the wrong number.

Wrong balance. Stale position. Missing reward.

For wallet apps, that erodes trust fast. For risk systems, it's worse. 📉

Sim's responses include USD values, unclaimed rewards, protocol metadata, and per-chain aggregations — calculated at query time, not from a cache.

[Sim @DuneSim]

@Dune Explore Sim https://t.co/7kEhG7MN9N

[Sim @DuneSim]

What does it cost to build what Sim does in-house?

💰 Indexers for 60+ chains
💰 Protocol decoders for every DeFi primitive
💰 Real-time pricing infrastructure
💰 Reorg handling
💰 Ongoing maintenance: new chains, schema updates, and new protocols added weekly

Months of engineering time. And you're still behind.🏗️

Sim is the shortcut. One key. Enterprise-grade API. Free tier to start.

[Sim @DuneSim]

@Dune https://t.co/Q5sdS6IOpl

[Sim @DuneSim]

Most teams poll for onchain data: Request → wait → request again.

Sim Subscriptions flip that.

Subscribe to wallet balance changes, new transactions, or onchain activity. Get notified within seconds. 🔔

2 compute unit per event. No fees to create or manage subscriptions.

Available across 60+ chains. Manage via API or the Sim Portal.

[Sim @DuneSim]

Explore Sim
https://t.co/ylwmZ96avn

[Sim @DuneSim]

Sim and @Dune data hub are two different tools. Together, they're a full onchain data stack.

Sim: real-time data, live DeFi positions, instant activity feeds across 60+ chains. For apps that need data now.

Dune data hub: SQL-queryable analytics, dashboards, historical data across 100+ chains. For analysis and research.

One platform. Two very different superpowers.

[Sim @DuneSim]

First Sim API call in under 5 minutes.

1️⃣ Get your API key for free
2️⃣ Add [X-Sim-Api-Key] header
3️⃣ Hit GET /v1/evm/balances/{address}

Multichain token balances, ordered by USD value, returned in one call. 🛠️

No indexer. No infrastructure. No DevOps.

https://t.co/YhoXtjHRcy