hydra_address_derive

THE RISK

Low Risk

Why hydra_address_derive needs a policy

This tool performs a deterministic derivation/computation of a foreign-chain address from a NEAR account. It is a pure read/query operation — it does not move funds, modify state, or execute transactions. The phrase 'same NEAR account + path → same address every time' confirms it is idempotent and has no side effects.

From the tool's definition Derive a foreign-chain address (Bitcoin, EVM, Solana) from a NEAR account using Chain Signatures (MPC). Same NEAR account + path → same address every time.

Risk signalsBulk/mass operation — affects multiple targets

Documented attack patterns abuse exactly the kind of access hydra_address_derive gives an agent:

POLICY

How to control hydra_address_derive

PolicyLayer is an MCP gateway — it sits between your AI agents and Near Hydra, and nothing reaches the server without passing your rules. This is the rule we recommend for hydra_address_derive:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "hydra_address_derive": {}
  }
}

hydra_address_derive is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Near Hydra — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Near Hydra tools

Financial hydra_swap_execute Execute an end-to-end cross-chain swap via NEAR Intents 1Click. Auto-routes the origin sen Financial hydra_swap_submit_deposit Notify 1Click that the deposit transaction has been broadcast. depositAddress comes from a Financial hydra_ensure_gas Top up the derived foreign-chain address with native gas, via a small NEAR Intents 1Click Financial hydra_send_btc Send BTC from a Chain-Signature-derived Bitcoin address. UTXO selection via Mempool API. S Financial hydra_send_evm Send a transaction on an EVM chain from a Chain-Signature-derived address. Supports native Financial hydra_send_ft Send a NEP-141 fungible token from the configured account. Calls ft_transfer with 1 yoctoN Financial hydra_send_near Send native NEAR from the configured account. SAFE BY DEFAULT: dry=true returns the plan w Financial hydra_send_solana Send native SOL from a Chain-Signature-derived Solana address. SAFE: dry=true returns the

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about hydra_address_derive

What does the hydra_address_derive tool do? +

Derive a foreign-chain address (Bitcoin, EVM, Solana) from a NEAR account using Chain Signatures (MPC). Same NEAR account + path → same address every time. It is categorised as a Read tool in the Near Hydra MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on hydra_address_derive? +

Register the Near Hydra MCP server in PolicyLayer and add a rule for hydra_address_derive: 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 Near Hydra. Nothing to install.

What risk level is hydra_address_derive? +

hydra_address_derive is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit hydra_address_derive? +

Yes. Add a rate_limit block to the hydra_address_derive 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.

How do I block hydra_address_derive completely? +

Set action: deny in the PolicyLayer policy for hydra_address_derive. 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.

What MCP server provides hydra_address_derive? +

hydra_address_derive is provided by the Near Hydra MCP server (nikshepsvn/near-hydra). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Near Hydra tool call.

Start from Near Hydra, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →