What are rate limits?
Rate limits control how many requests you can make per second. When rate limits are exceeded, you’ll receive an HTTP 429 response.
Standard Rate Limits
Your plan has two standard rate limit groups: one for RPC requests, and one for DAS API requests. Here are the base rate limits for each Helius plan:
| Plan | RPC Rate Limit | DAS & Enhanced APIs |
|---|
| Free | 10 requests/s | 2 requests/s |
| Developer | 50 requests/s | 10 requests/s |
| Business | 200 requests/s | 50 requests/s |
| Professional | 500 requests/s | 100 requests/s |
| Enterprise | Custom | Custom |
Increase Rate Limits
Teams on Professional plans can purchase an extra 100 RPS for $100/month.
If you need custom rate limits ahead of launches, contact our sales team. If you are on Developer or Business tier, please upgrade your plan to increase your rate limits.
Special Rate Limits
Some endpoints and specialized Helius products have special rate limits due to their computational requirements.
Sending Transactions
| Endpoint | Free | Developer | Business | Professional |
|---|
Sender | 50/sec | 50/sec | 50/sec | 50/sec |
sendTransaction | 1/sec | 5/sec | 50/sec | 100/sec |
simulateBundle | 10/sec | 50/sec | 200/sec | 500/sec |
If you are on a Professional plan and need to increase your sendTransaction rate limits, contact our sales team.
Professional plan users can also request rate limit increases and custom tip arrangements for Sender to support higher-throughput trading apps.
Complex RPC Calls
| Endpoint | Free | Developer | Business | Professional |
|---|
getProgramAccounts | 5/sec | 25/sec | 50/sec | 75/sec |
Historical Data
When making batch requests for historical data methods, the following limits apply:
| Method | Max Batch Size |
|---|
getTransaction | 100 items per request |
getTransactionsForAddress | No batch requests allowed |
| All other historical methods | 10 items per request |
Exceeding batch limits will result in an error response. For getTransactionsForAddress, each address must be queried in a separate request.
LaserStream
| Resource | Free | Developer | Business | Professional |
|---|
| Networks | — | Devnet | Devnet, Mainnet | Devnet, Mainnet |
| Max Pubkeys | — | 10M | 10M | 10M |
| Active Connections | — | — | 10 | 100 |
Wallet API
The Wallet API follows the same rate limits as DAS & Enhanced APIs. All endpoints share these limits:
| Endpoint | Free | Developer | Business | Professional |
|---|
| All Wallet API Endpoints | 2/sec | 10/sec | 50/sec | 100/sec |
This includes identity lookups, balances, history, transfers, and funding source endpoints. Learn more in our Wallet API documentation.
WebSockets
| Resource | Free | Developer | Business | Professional |
|---|
| Concurrent Connections | 5 | 150 | 250 | 1,000 |
| Subscriptions per Connection | 1,000 | 1,000 | 1,000 | 1,000 |
| WebSocket Types | Standard | Standard, Enhanced | Standard, Enhanced | Standard, Enhanced |
Webhooks
| Resource | Free | Developer | Business | Professional |
|---|
| Max Webhooks | 5 | 50 | 50 | 50 |
| Addresses per Webhook | 100k | 100k | 100k | 100k |
ZK Compression
| Service | Free | Developer | Business | Professional |
|---|
| Photon APIs | 2/sec | 10/sec | 50/sec | 100/sec |
getValidityProof | 1/sec | 5/sec | 10/sec | 20/sec |
