zap-receipts
Fetch zap receipts (kind 9735) for the active identity. Returns sender, amount in msats, and message.
This record as markdown: /tools/dev-forgesworn-bray/zap-receipts.md
What zap-receipts does on Nostr Bray
AI agents call zap-receipts 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 zap-receipts is rated Low
This tool retrieves historical zap receipt records (financial transaction metadata) associated with the user's identity. It is purely a query operation that reads existing data without creating, modifying, deleting, or executing any actions. While it does access financial-related information (zap amounts), it does not move money, commit obligations, or trigger transactions—it only reads past receipt records.
From the tool's definition Tool description: 'Fetch zap receipts (kind 9735) for the active identity. Returns sender, amount in msats, and message.' The verb 'Fetch' indicates data retrieval with no modification or side effects.
Attacks that exploit this kind of access
The rule that runs zap-receipts 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 zap-receipts, this is the rule to start with:
zap-receipts 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 zap-receipts call is checked against it from then on.
Questions about zap-receipts
Fetch zap receipts (kind 9735) for the active identity. Returns sender, amount in msats, and message. 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 zap-receipts: 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.
zap-receipts 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 zap-receipts 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 zap-receipts. 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.
zap-receipts 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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