Use this skill when the user wants to interact with blockchains via Pars Cloud APIs. Covers 100+ EVM and non-EVM chains including Ethereum, Solana, Base, Arbitrum, Polygon, Lux, and more. Provides RPC, data, token, NFT, webhook, and wallet APIs.
Use this skill when:
PARS_API_KEY is not set, tell the user to get one free at https://cloud.pars.network/dashboard, or switch to the pars-gateway skill for keyless access.Before making any request, silently verify:
PARS_API_KEY environment variable is set and non-emptyexport PARS_API_KEY=<your-key>| Item | Value |
|------|-------|
| Base URL | https://api.cloud.pars.network/v1 |
| Auth header | X-API-Key: ${PARS_API_KEY} |
| Alt auth | URL path: https://api.cloud.pars.network/v1/${PARS_API_KEY}/eth/mainnet |
| WebSocket | wss://ws.cloud.pars.network/v1/${PARS_API_KEY} |
| Status | https://status.cloud.pars.network |
| Docs | https://cloud.pars.network/docs |
| Dashboard | https://cloud.pars.network/dashboard |
| Chain | Network ID | Mainnet | Testnet |
|-------|-----------|---------|---------|
| Ethereum | eth | eth/mainnet | eth/sepolia, eth/holesky |
| Base | base | base/mainnet | base/sepolia |
| Arbitrum | arb | arb/mainnet | arb/sepolia |
| Polygon | polygon | polygon/mainnet | polygon/amoy |
| Optimism | opt | opt/mainnet | opt/sepolia |
| Solana | sol | sol/mainnet | sol/devnet |
| Lux | lux | lux/mainnet | lux/testnet |
| Avalanche | avax | avax/mainnet | avax/fuji |
| BNB Chain | bsc | bsc/mainnet | bsc/testnet |
| 90+ more | ... | See docs | See docs |
curl -X POST https://api.cloud.pars.network/v1/eth/mainnet \
-H "Content-Type: application/json" \
-H "X-API-Key: ${PARS_API_KEY}" \
-d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}'
curl "https://api.cloud.pars.network/v1/data/tokens/balances?address=0x...&network=eth/mainnet" \
-H "X-API-Key: ${PARS_API_KEY}"
curl "https://api.cloud.pars.network/v1/data/nfts?owner=0x...&network=eth/mainnet" \
-H "X-API-Key: ${PARS_API_KEY}"
curl -X POST https://api.cloud.pars.network/v1/webhooks \
-H "Content-Type: application/json" \
-H "X-API-Key: ${PARS_API_KEY}" \
-d '{
"url": "https://your-server.com/webhook",
"network": "eth/mainnet",
"event_type": "address_activity",
"addresses": ["0x..."]
}'
| Task | Endpoint | Method |
|------|----------|--------|
| JSON-RPC call | POST /v1/{network} | POST |
| Get token balances | GET /v1/data/tokens/balances | GET |
| Get token prices | GET /v1/data/tokens/prices | GET |
| Get token metadata | GET /v1/data/tokens/metadata | GET |
| Get NFTs by owner | GET /v1/data/nfts | GET |
| Get NFT metadata | GET /v1/data/nfts/metadata | GET |
| Get transfers | GET /v1/data/transfers | GET |
| Get transaction history | GET /v1/data/transactions | GET |
| Get portfolio | GET /v1/data/portfolio | GET |
| Create webhook | POST /v1/webhooks | POST |
| List webhooks | GET /v1/webhooks | GET |
| Delete webhook | DELETE /v1/webhooks/{id} | DELETE |
| WebSocket subscribe | WS /v1/{api_key} | WS |
| Smart wallet create | POST /v1/wallets/create | POST |
| Smart wallet execute | POST /v1/wallets/execute | POST |
| Gas estimate | POST /v1/gas/estimate | POST |
| Simulate transaction | POST /v1/simulate | POST |
Core JSON-RPC access for 100+ chains with load balancing and automatic failover.
| Endpoint | Description |
|----------|-------------|
| POST /v1/{network} | Standard JSON-RPC proxy (eth_call, eth_sendRawTransaction, etc.) |
| POST /v1/{network}/debug | Debug namespace (debug_traceTransaction, debug_traceCall) |
| POST /v1/{network}/trace | Trace namespace (trace_block, trace_transaction) |
| WS /v1/{api_key} | WebSocket for subscriptions (newHeads, logs, pendingTransactions) |
Structured onchain data across tokens, NFTs, transfers, and portfolio views.
| Endpoint | Description |
|----------|-------------|
| GET /v1/data/tokens/balances | ERC-20 balances for any address |
| GET /v1/data/tokens/prices | Real-time token prices (USD, ETH, BTC) |
| GET /v1/data/tokens/metadata | Token name, symbol, decimals, logo |
| GET /v1/data/nfts | NFTs owned by address |
| GET /v1/data/nfts/metadata | NFT metadata, media, traits |
| GET /v1/data/transfers | Token and NFT transfer history |
| GET /v1/data/transactions | Full transaction history |
| GET /v1/data/portfolio | Aggregated portfolio across chains |
High-throughput Solana access with Yellowstone gRPC and DAS.
| Endpoint | Description |
|----------|-------------|
| POST /v1/sol/mainnet | Solana JSON-RPC |
| gRPC /v1/sol/yellowstone | Yellowstone gRPC streams (accounts, transactions, blocks) |
| POST /v1/sol/das | Digital Asset Standard API (compressed NFTs, Metaplex) |
| WS /v1/sol/ws | Solana WebSocket subscriptions |
Push-based notifications for onchain events with managed delivery.
| Endpoint | Description |
|----------|-------------|
| POST /v1/webhooks | Create webhook subscription |
| GET /v1/webhooks | List active webhooks |
| GET /v1/webhooks/{id} | Get webhook details |
| DELETE /v1/webhooks/{id} | Delete webhook |
| POST /v1/webhooks/{id}/test | Send test event |
Supported event types: address_activity, token_transfer, nft_transfer, new_block, contract_event, pending_transaction.
ERC-4337 account abstraction with gas sponsorship and social login.
| Endpoint | Description |
|----------|-------------|
| POST /v1/wallets/create | Create smart wallet |
| POST /v1/wallets/execute | Execute user operation |
| POST /v1/wallets/batch | Batch multiple operations |
| POST /v1/gas/estimate | Estimate gas for user operation |
| POST /v1/gas/sponsor | Sponsor gas for user |
Practical integration patterns.
| Recipe | Description | |--------|-------------| | Token swap monitoring | Watch DEX swaps and notify on price impact | | NFT mint tracker | Alert when new NFTs are minted in a collection | | Wallet portfolio | Build multi-chain portfolio dashboard | | Transaction relay | Submit and track transactions with retry logic | | Airdrop checker | Check eligibility across protocols |
| Code | Meaning | Action | |------|---------|--------| | 200 | Success | Process response | | 400 | Bad request | Check parameters | | 401 | Unauthorized | Check API key | | 429 | Rate limited | Exponential backoff (1s, 2s, 4s, 8s, max 30s) | | 500 | Server error | Retry up to 3 times | | 502/503 | Upstream error | Retry with different endpoint |
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Category:developer