BEST FOR: lowest-latency production streaming via gRPC (slots, accounts, transactions, blocks). PREFER transactionSubscribe for simpler WebSocket-based streaming. PREFER createWebhook for fire-and-forget notifications. Get Laserstream gRPC config for high-performance Solana streaming. Subscribe t...
High parameter count (18 properties)
Part of the Helius MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call laserstreamSubscribe to retrieve information from Helius without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though laserstreamSubscribe only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
tools:
laserstreamSubscribe:
rules:
- action: allowSee the full Helius policy for all 63 tools.
Agents calling read-class tools like laserstreamSubscribe have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.
BEST FOR: lowest-latency production streaming via gRPC (slots, accounts, transactions, blocks). PREFER transactionSubscribe for simpler WebSocket-based streaming. PREFER createWebhook for fire-and-forget notifications. Get Laserstream gRPC config for high-performance Solana streaming. Subscribe to slots, accounts, transactions, blocks, or entries. 24h historical replay. Professional plan for mainnet. Returns connection config and code example.. It is categorised as a Read tool in the Helius MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for laserstreamSubscribe. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Helius MCP server.
laserstreamSubscribe is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the laserstreamSubscribe rule in your Intercept policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the Intercept policy for laserstreamSubscribe. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
laserstreamSubscribe is provided by the Helius MCP server (helius-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.