nip05-lookup
Resolve a NIP-05 identifier (user@domain) to a Nostr pubkey. Also returns relay hints if the server provides them. Use this to find someone\
This record as markdown: /tools/dev-forgesworn-bray/nip05-lookup.md
What nip05-lookup does on Nostr Bray
AI agents call nip05-lookup to retrieve information from Nostr Bray without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why nip05-lookup is rated Low
This is a straightforward lookup service that translates a user identifier to a public key. It retrieves information without altering any state. The low severity reflects that reading public key data carries minimal risk, as Nostr pubkeys are intended for public discovery.
From the tool's definition Tool performs 'Resolve a NIP-05 identifier' and 'returns relay hints' — purely retrieves/queries data with no side effects. No modification, deletion, execution, or financial operation is possible.
Attacks that exploit this kind of access
The rule that runs nip05-lookup safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Nostr Bray, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For nip05-lookup, this is the rule to start with:
nip05-lookup is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Nostr Bray, apply this rule, and every nip05-lookup call is checked against it from then on.
Questions about nip05-lookup
Resolve a NIP-05 identifier (user@domain) to a Nostr pubkey. Also returns relay hints if the server provides them. Use this to find someone\. It is categorised as a Read tool in the Nostr Bray MCP Server, which means it retrieves data without modifying state.
Register the Nostr Bray MCP server in PolicyLayer and add a rule for nip05-lookup: 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 Nostr Bray. Nothing to install.
nip05-lookup 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 nip05-lookup 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 nip05-lookup. 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.
nip05-lookup is provided by the Nostr Bray MCP server (nostr-bray). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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