# tribonacci

The nth Tribonacci number. T0 and T1 are 0, T2 is 1, and each later term is the sum of the previous three. An optional modulus reduces the term, and zero is rejected. n runs from 0 to 4096. 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/tribonacci

Agent View of the PolicyLayer registry record for `tribonacci`. HTML page: https://policylayer.com/tools/com-it-scorptech-x402/tribonacci

## Facts

- Tool: `tribonacci`
- Server: ScorpTech x402 API (`https://scorptech.it.com/api/x402/mcp`) — https://policylayer.com/tools/com-it-scorptech-x402.md
- Homepage: https://github.com/https://scorptech.it.com/api/x402/mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 2 (1 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `n` | integer | yes |  |
| `mod` | string | no |  |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "tribonacci",
    "arguments": {
      "n": 0
    }
  }
}
```

## Why tribonacci is rated Low

Even though tribonacci 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.

## Use case

AI agents call tribonacci 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.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches ScorpTech x402 API:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "tribonacci": {}
  }
}
```

## Other tools on ScorpTech x402 API (1011)

- `collatz_drop` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/collatz-drop.md
- `dedupe_records` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/dedupe-records.md
- `evm_selector_decode` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/evm-selector-decode.md
- `frames_timecode` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/frames-timecode.md
- `ip_reputation` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/ip-reputation.md
- `led_resistor` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/led-resistor.md
- `ruler_odd` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/ruler-odd.md
- `sql_format` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/sql-format.md
- `timecode_diff` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/timecode-diff.md
- `timecode_duration` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/timecode-duration.md
- `timecode_frames` — Destructive — https://policylayer.com/tools/com-it-scorptech-x402/timecode-frames.md
- `abi_encode` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/abi-encode.md
- `apery_term` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/apery-term.md
- `ballot` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/ballot.md
- `baum_sweet` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/baum-sweet.md
- `binom` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/binom.md
- `bit_subset` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/bit-subset.md
- `biunitary_sigma` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/biunitary-sigma.md
- `champernowne_start` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/champernowne-start.md
- `clinical_trials` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/clinical-trials.md
- `coin_min` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/coin-min.md
- `coin_ways` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/coin-ways.md
- `color_palette` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/color-palette.md
- `compound_interest` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/compound-interest.md
- `cron_explain` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/cron-explain.md
- `curl_to_code` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/curl-to-code.md
- `date_calc` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/date-calc.md
- `delannoy` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/delannoy.md
- `delannoy_sum` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/delannoy-sum.md
- `dmarc_report_parse` — Execute — https://policylayer.com/tools/com-it-scorptech-x402/dmarc-report-parse.md
- …and 981 more: https://policylayer.com/tools/com-it-scorptech-x402.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-it-scorptech-x402 · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-it-scorptech-x402