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Wallets & Payments

Complete transaction history, any address, any chain

Your users don't care which chain their tokens are on — they want to see everything in one feed. SQD delivers full transaction history, token balances, and transfer events across 225+ networks in under 50ms.

27ms P50 latency
99.9% Uptime SLA
0% Error rate
225+ Networks
Capabilities

Built for wallets & payments at scale

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Full address history, sub-50ms

Query the complete transaction history for any address across any supported chain. Internal transactions, token transfers, NFT movements, and contract interactions — all in a single response, even for wallets with thousands of transactions.

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Multi-standard token indexing

ERC-20 transfers, ERC-721 ownership changes, and ERC-1155 batch transfers indexed with real-time updates. Balances reflect the latest confirmed block, not a cached snapshot from 5 minutes ago.

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Cross-chain portfolio in one call

Aggregate a wallet's positions across Ethereum, L2s, Solana, and 220+ other networks without writing per-chain aggregation logic. One API call returns the complete picture — your frontend just renders it.

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Transfer event streaming for alerts

Stream Transfer, Approval, and ApprovalForAll events for monitored addresses as they confirm on-chain. Build push notifications, approval revocation alerts, and suspicious activity detection without managing WebSocket connections.

Use cases

What teams build with SQD

Wallet transaction feeds with human-readable labels
Multi-chain balance lookups for portfolio dashboards
Payment verification and receipt generation
Token approval management and revocation UIs
Address activity monitoring for custody solutions
Fiat on-ramp enrichment with token metadata
Performance under pressure

Your worst traffic day is our normal Tuesday

Token launches, airdrops, and market crashes all produce the same pattern: every user opens their wallet simultaneously to check balances. Most data providers degrade under this load — response times climb from milliseconds to seconds, and error rates spike.

SQD's 2,800+ worker nodes across a decentralized network don't have a single bottleneck to saturate. The same architecture that indexes 2 petabytes of cross-chain data handles your traffic spikes without breaking a sweat. P50 stays at 27ms. P90 stays at 48.5ms. Error rate stays at 0%.

Independently verified
P50 response time Verified in production by a top perpetual DEX
27ms
P90 response time Consistent across traffic spikes
48.5ms
Error rate Zero errors in production monitoring period
0%
Network nodes Decentralized — no single point of failure
2,800+
Data freshness NDJSON streaming, not polling
Real-time
Data coverage

Everything a wallet needs to display, in one API

Stop stitching together 5 different providers for transactions, token balances, NFTs, approvals, and activity feeds. SQD covers the full data surface.

Native transfers ETH, SOL, MATIC — every native currency transfer with gas details
ERC-20 transfers Full transfer history with decoded token names, symbols, and decimal-adjusted amounts
NFT movements ERC-721 and ERC-1155 transfers including batch operations and metadata URIs
Token approvals Approval and ApprovalForAll events — the data behind approval revocation UIs
Contract interactions Decoded function calls with parameter names and types, not raw calldata
Internal transactions Nested calls that move funds through contracts — invisible to basic indexers
Get started

Your blockchain data infrastructure, handled.

Private Portal. Dedicated. Validated. Managed. Tell us what you're building — we'll show you what it looks like on SQD.