josephus_first
The first person eliminated in the Josephus circle. With 5 people and every 2nd, person 2 leaves first. With every 3rd, person 3 leaves first. A circle of one person has nobody to eliminate. n runs from 2 to 10000 and k from 1 to 10000. Price: $0.001 USDC per successful call (x402, Solana). Same ...
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What josephus_first does on ScorpTech x402 API
AI agents call josephus_first to retrieve information from ScorpTech x402 API without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
k | integer | Yes | |
n | integer | Yes |
Parameters from the server's own tool schema.
Why josephus_first is rated Low
Even though josephus_first 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.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
The rule that runs josephus_first safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ScorpTech x402 API, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For josephus_first, this is the rule to start with:
josephus_first 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 ScorpTech x402 API, apply this rule, and every josephus_first call is checked against it from then on.
Questions about josephus_first
The first person eliminated in the Josephus circle. With 5 people and every 2nd, person 2 leaves first. With every 3rd, person 3 leaves first. A circle of one person has nobody to eliminate. n runs from 2 to 10000 and k from 1 to 10000. Price: $0.001 USDC per successful call (x402, Solana). Same tool over HTTPS: POST https://scorptech.it.com/api/x402/v1/josephus-first. It is categorised as a Read tool in the ScorpTech x402 API MCP Server, which means it retrieves data without modifying state.
josephus_first accepts 2 parameters: k, n. Required: k, n. The full parameter table on this page comes from the server's own tool schema.
Register the ScorpTech x402 API MCP server in PolicyLayer and add a rule for josephus_first: 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 ScorpTech x402 API. Nothing to install.
josephus_first 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 josephus_first 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 josephus_first. 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.
josephus_first is provided by the ScorpTech x402 API MCP server (https://scorptech.it.com/api/x402/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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