OverBlock Data Apps
Managed blockchain data services. Activate an app, get a token, call the API.
Bitcoin & Ethereum Block Streaming
High-throughput gRPC stream of ordered blocks for indexers and data pipelines. Any block range, resumable, multiple wire formats.
- Ordered block delivery via gRPC
- Full range traversal: genesis → any block height
- Confirmed blocks (~6 BTC, ~50 ETH confirmations)
- Resumable: reconnect at any block height
- JSON and MessagePack wire formats
- WebSocket fallback for gRPC-limited environments
- Backpressure: client controls consumption speed
Bitcoin Fee Estimation & Mempool Analytics
REST + SSE API for sat/vB fee recommendations, updated every 10-30 seconds. Full fee management toolkit: RBF, CPFP, deadline, batch planner.
- fast / medium / slow sat/vB with per-txType estimates (p2wpkh, p2tr, p2pkh…)
- RBF bump calculator (BIP125-compliant)
- CPFP child fee planner
- Deadline fee: confirm within N seconds at probability P
- Batch planner: minimize cost across N transactions with deadline
- Full mempool market data (tx count, histogram, thresholds)
- SSE stream - real-time updates without polling
- Tx status: in_mempool / confirmed / replaced_by_rbf
- Address activity tracking
EVM Gas Fee Estimation
Gas fee API for EVM networks. EIP-1559 and legacy gasPrice support. Accurate per-transaction gas cost, baseFee prediction, stuck tx recovery.
- EIP-1559: maxPriorityFee + maxFeePerGas tiers (fast / medium / slow)
- Legacy gasPrice mode (Ethereum Classic)
- eth_estimateGas integration - real gas cost per transaction
- BaseFee worst-case prediction for N blocks ahead
- Stuck tx recovery (minimum +10% EVM rule)
- Batch transaction planner (minimize_cost, uniform, asap)
- Network market data (baseFee history, utilization, pending tx count)
- SSE stream for real-time fee updates
- Per-network config: Polygon high volatility, BSC stable baseFee
Indexed Data Apps
Pre-indexed historical data for specific protocols and token standards. REST API with a predictable schema - no full-chain traversal.
- Protocol-specific data models
- REST API with consistent schema
- Pagination and filtering built-in
- No node or indexer required
- Multiple protocols planned
Custom Indexers
Define your data model in TypeScript in the dashboard UI. OverBlock deploys and operates the indexer pipeline - historical or real-time. You consume via API.
- TypeScript data model in dashboard UI (code editor or file upload)
- Deployment controls: deploy, pause, restart, view logs
- Historical and real-time modes
- OverBlock manages infrastructure, scaling, and reorgs
- Consume results via API or streams