BEST FOR: sending native SOL from your MCP wallet to another address. PREFER transferToken for SPL tokens. Transfers native SOL using Helius Sender for optimal landing rates. Requires a configured keypair (call generateKeypair if needed). This is an irreversible on-chain transaction. Set sendMax ...
Bulk/mass operation — affects multiple targets
Part of the Helius MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use transferSol to initiate financial transactions through Helius. Financial operations involve real money and are irreversible once processed. Intercept blocks financial tools by default, requiring explicit human approval with transaction-level limits to prevent unauthorised spending.
transferSol moves real money. Without a policy, an autonomous agent could initiate transactions that drain accounts or exceed budgets. Intercept blocks financial tools by default, requiring human-in-the-loop approval with configurable spending limits per transaction and per time window.
Financial tools involve real money. Block by default and require explicit human approval before enabling.
tools:
transferSol:
rules:
- action: deny
reason: "Requires human approval"See the full Helius policy for all 63 tools.
Agents calling financial-class tools like transferSol have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Financial risk category across the catalogue. The same policy patterns (deny, require_approval) apply to each.
transferSol is one of the critical-risk operations in Helius. For the full severity-focused view — only the critical-risk tools with their recommended policies — see the breakdown for this server, or browse all critical-risk tools across every MCP server.
BEST FOR: sending native SOL from your MCP wallet to another address. PREFER transferToken for SPL tokens. Transfers native SOL using Helius Sender for optimal landing rates. Requires a configured keypair (call generateKeypair if needed). This is an irreversible on-chain transaction. Set sendMax to true to drain the entire SOL balance (sends balance minus transaction fees). Credit cost: ~3 credits (CU simulation + priority fee estimate + send).. It is categorised as a Financial tool in the Helius MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Add a rule in your Intercept YAML policy under the tools section for transferSol. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Helius MCP server.
transferSol is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the transferSol 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 transferSol. 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.
transferSol 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.