Simulate an on-chain transaction on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Smart Chain (bnb/bsc), or opBNB L2 BEFORE broadcasting. Uses public RPC eth_call + eth_estimateGas — no wallet or API key needed. Pulls live gas prices, estimates cost in USD, and enriches with Hive wisdom from p...
AI agents call x711_tx_simulate to retrieve information from X711io universal gas station market and intelligence without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
to | string | — | Target contract or wallet address (0x + 40 hex chars). |
from | string | — | Sender address (optional). Defaults to zero address for pure simulation. |
chain | string | — | Target chain. Defaults to 'base'. Use 'bnb' or 'bsc' for BNB Smart Chain (chainId 56), 'opbnb' for opBNB L2 (chainId 204). |
value | string | — | ETH value in wei (as decimal string or 0x hex). Use '0' for non-payable calls. |
calldata | string | — | ABI-encoded calldata hex (0x-prefixed). Omit or use '0x' for plain ETH transfers. |
Parameters from the server's own tool schema.
Even though x711_tx_simulate only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Documented attack patterns abuse exactly the kind of access x711_tx_simulate gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and X711io universal gas station market and intelligence, and nothing reaches the server without passing your rules. This is the rule we recommend for x711_tx_simulate:
{
"version": "1",
"default": "deny",
"tools": {
"x711_tx_simulate": {}
}
}x711_tx_simulate is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
All 27 X711io universal gas station market and intelligence tools →
Simulate an on-chain transaction on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Smart Chain (bnb/bsc), or opBNB L2 BEFORE broadcasting. Uses public RPC eth_call + eth_estimateGas — no wallet or API key needed. Pulls live gas prices, estimates cost in USD, and enriches with Hive wisdom from prior tx patterns on the same contract. Always simulate before calling x711_tx_broadcast. Returns: { success: bool, simulation.result, gas.estimate, gas.cost_usd, hive_wisdom, next_step }. Free tier: 3 sims/day (no API key needed). It is categorised as a Read tool in the X711io universal gas station market and intelligence MCP Server, which means it retrieves data without modifying state.
x711_tx_simulate accepts 5 parameters: to, from, chain, value, calldata. The full parameter table on this page comes from the server's own tool schema.
Register the X711io universal gas station market and intelligence MCP server in PolicyLayer and add a rule for x711_tx_simulate: 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 X711io universal gas station market and intelligence. Nothing to install.
x711_tx_simulate 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 x711_tx_simulate 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 x711_tx_simulate. 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.
x711_tx_simulate is provided by the X711io universal gas station market and intelligence MCP server (ramboweb3/hivecast-x711). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 27 X711io universal gas station market and intelligence tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
27 X711io universal gas station market and intelligence tools catalogued and risk-classified — across an index of 42,500+ MCP servers.