Set a Helius API key for Solana RPC reads at runtime — no restart required. The server constructs the canonical Helius mainnet URL (https://mainnet.helius-rpc.com/?api-key=<KEY>) internally and uses it for every subsequent Solana call until the process restarts. Takes precedence over SOLANA_RPC_U...
AI agents use set_helius_api_key to create or update resources in VaultPilot MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your VaultPilot MCP environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
apiKey | string | Yes | Helius API key (UUID format: 8-4-4-4-12 hex chars). Get one for free at https://dashboard.helius.dev/. Pass the bare key — the server constructs the canonical H |
Parameters from the server's own tool schema.
An AI agent can call set_helius_api_key faster than any human can review — one bad instruction and it creates or modifies resources in VaultPilot MCP by the hundred, each call as confident as the last.
Risk signalsHandles credentials or secrets (apiKey) · Bulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Set a Helius API key for Solana RPC reads at runtime — no restart required. The server constructs the canonical Helius mainnet URL (https://mainnet.helius-rpc.com/?api-key=<KEY>) internally and uses it for every subsequent Solana call until the process restarts. Takes precedence over SOLANA_RPC_URL env var and userConfig. Designed for the demo-mode flow where users want to fix Solana rate-limits without restarting their MCP client, but works in any mode. INPUT: bare API key only (UUID format, 8-4-4-4-12 hex). Pasting a URL is rejected to prevent prompt-injection redirects to malicious endpoints. WHERE TO GET ONE: https://dashboard.helius.dev/ — sign in (GitHub or email), copy the default API key auto-created on first login. Free tier covers personal-volume Solana reads + writes. PERSISTENCE: process memory only. To save across restarts, run vaultpilot-mcp-setup (after exiting demo mode if applicable) and pick "Solana RPC URL" — paste the same key there. AGENT BEHAVIOR: when the user pastes a key in chat ('here's my Helius key: <uuid>'), call this tool immediately. NEVER echo the key back in any subsequent response — treat it as secret-shaped even though Helius keys can be regenerated. It is categorised as a Write tool in the VaultPilot MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
set_helius_api_key accepts 1 parameter: apiKey. Required: apiKey. The full parameter table on this page comes from the server's own tool schema.
Register the VaultPilot MCP server in PolicyLayer and add a rule for set_helius_api_key: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches VaultPilot MCP. Nothing to install.
set_helius_api_key is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the set_helius_api_key rule in your PolicyLayer 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 PolicyLayer policy for set_helius_api_key. 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.
set_helius_api_key is provided by the VaultPilot MCP server (vaultpilot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.