sigma_k

SERVERScorpTech x402 API SOURCEhttps://scorptech.it.com/api/x402/mcp

Low RISK CLASS

Category Read

Parameters 22 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/com-it-scorptech-x402/sigma-k.md

WHAT IT DOES

What sigma_k does on ScorpTech x402 API

AI agents call sigma_k 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.

RISK

Why sigma_k is rated Low

Even though sigma_k 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.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs sigma_k 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 sigma_k, this is the rule to start with:

sigma_k Allowed

sigma_k is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sigma_k": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect ScorpTech x402 API, apply this rule, and every sigma_k call is checked against it from then on.

FAQ

Questions about sigma_k

What does the sigma_k tool do? +

The sum of the kth powers of the divisors of n. sigma_2(1) is 1, sigma_2(6) is 50, and sigma_2(12) is 210. n runs from 1 to 1000000000000, and k runs from 2 to 12. Past 15 digits the value is a decimal string. Price: $0.001 USDC per successful call (x402, Solana). Same tool over HTTPS: POST https://scorptech.it.com/api/x402/v1/sigma-k. It is categorised as a Read tool in the ScorpTech x402 API MCP Server, which means it retrieves data without modifying state.

What parameters does sigma_k accept? +

sigma_k accepts 2 parameters: k, n. Required: k, n. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on sigma_k? +

Register the ScorpTech x402 API MCP server in PolicyLayer and add a rule for sigma_k: 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.

What risk level is sigma_k? +

sigma_k is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit sigma_k? +

Yes. Add a rate_limit block to the sigma_k 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.

How do I block sigma_k completely? +

Set action: deny in the PolicyLayer policy for sigma_k. 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.

What MCP server provides sigma_k? +

sigma_k 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.

KEEP EXPLORING

More on ScorpTech x402 API, and thousands of servers like it.

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Roll out MCP under one policy →Data exfiltration →MCP token cost →