Buy up to 20 SPECIFIC listed ENS names in a SINGLE Seaport transaction, across NameWhisper, OpenSea, AND Grails listings. Use this when the user names the exact names to buy. To buy the cheapest N names in a category/collection (a floor sweep), use the 'sweep' tool instead. It's one signature and...
Part of the Name Whisper — ENS Intelligence Layer server.
Free to start. No card required.
AI agents call batch_purchase to retrieve information from Name Whisper — ENS Intelligence Layer without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though batch_purchase only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"batch_purchase": {}
}
}See the full Name Whisper — ENS Intelligence Layer policy for all 42 tools.
These attack patterns abuse exactly the kind of access batch_purchase gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Buy up to 20 SPECIFIC listed ENS names in a SINGLE Seaport transaction, across NameWhisper, OpenSea, AND Grails listings. Use this when the user names the exact names to buy. To buy the cheapest N names in a category/collection (a floor sweep), use the 'sweep' tool instead. It's one signature and amortizes gas, far cheaper than calling purchase_name once per name. For each name it picks the cheapest listing (NameWhisper, OpenSea, or Grails), loads its Seaport order, and packs them into one fulfillAvailableAdvancedOrders call. NFTs are delivered directly to the buyer's wallet. Seaport skips any order that sold/cancelled since discovery and refunds the excess — partial fills are safe. The response lists which names made the batch (with marketplace + price) and which were dropped. Any listing that can't be batched (e.g. a rare restricted-zone Seaport order) is returned in 'failed' — buy those individually with purchase_name. For a single name, purchase_name is also fine.. It is categorised as a Read tool in the Name Whisper — ENS Intelligence Layer MCP Server, which means it retrieves data without modifying state.
Register the Name Whisper — ENS Intelligence Layer MCP server in PolicyLayer and add a rule for batch_purchase: 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 Name Whisper — ENS Intelligence Layer. Nothing to install.
batch_purchase 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 batch_purchase 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 batch_purchase. 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.
batch_purchase is provided by the Name Whisper — ENS Intelligence Layer MCP server (https://namewhisper.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 42 Name Whisper — ENS Intelligence Layer tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.