BEST FOR: sending SPL tokens (USDC, BONK, JUP, etc.) from your MCP wallet to another address. PREFER transferSol for native SOL. Automatically creates recipient token account if needed. Uses Helius Sender for optimal landing rates. Requires a configured keypair. This is an irreversible on-chain t...
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 transferToken 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.
transferToken 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:
transferToken:
rules:
- action: deny
reason: "Requires human approval"See the full Helius policy for all 63 tools.
Agents calling financial-class tools like transferToken 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.
transferToken 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 SPL tokens (USDC, BONK, JUP, etc.) from your MCP wallet to another address. PREFER transferSol for native SOL. Automatically creates recipient token account if needed. Uses Helius Sender for optimal landing rates. Requires a configured keypair. This is an irreversible on-chain transaction. Set sendMax to true to send the entire token balance and close the sender token account (reclaims rent). Credit cost: ~13 credits (10 DAS for mint info + ~3 for CU simulation, priority fee, 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 transferToken. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Helius MCP server.
transferToken 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 transferToken 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 transferToken. 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.
transferToken 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.