Hyperion MCP Policy · 355 Tools

POLICY

How to control Hyperion

PolicyLayer is an MCP gateway — it sits between your AI agents and Hyperion, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "o_base_convert": {
    "limits": [
      {
        "counter": "o_base_convert_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "ascii": {
    "limits": [
      {
        "counter": "ascii_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Hyperion — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON HYPERION →

Instant setup, no code required.

FULL CATALOGUE

All 355 Hyperion tools

EXECUTE 4 tools

Execute cron Explain/validate/next-run cron expressions (150 sats/call; free tier 100 calls/mo) Execute execute_js Run JS in a sandbox, capture output (300 sats/call; free tier 100 calls/mo) Execute o_csp_parse Content-Security-Policy header analysis & grade (200 sats/call; free tier 100 calls/mo) Execute o_transform rot13/base32/morse/reverse (offline) (200 sats/call; free tier 100 calls/mo)

WRITE 6 tools

Write o_base_convert Binary/octal/decimal/hex number conversion (offline) (200 sats/call; free tier 100 calls/mo) Write o_datauri Parse or create data: URIs (200 sats/call; free tier 100 calls/mo) Write o_dockerhub Docker Hub repo pulls, stars, last update (no key) (200 sats/call; free tier 100 calls/mo) Write o_formaudit Enumerate forms/inputs (login/upload) — attack surface (200 sats/call; free tier 100 calls/mo) Write o_wikipv Page length, last edit, editor (200 sats/call; free tier 100 calls/mo) Write titan_generate Run LLM inference on the RTX 4080 (needs titan key) (0 sats/call; free tier 100 calls/mo)

READ 345 tools

EXPLORE

Related servers

Other MCP servers with similar tools — same risk classification, starter policies for each.

FAQ

Questions about Hyperion

How do I prevent bulk modifications through Hyperion? +

The Hyperion server has 6 write tools including o_base_convert, o_datauri, o_dockerhub. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Hyperion.

How many tools does the Hyperion MCP server expose? +

355 tools across 3 categories: Execute, Read, Write. 345 are read-only. 10 can modify, create, or delete data.

How do I enforce a policy on Hyperion? +

Register the Hyperion MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Hyperion

What Hyperion exposes to your agents

What Hyperion costs in tokens

The most dangerous Hyperion tools

How to control Hyperion

All 355 Hyperion tools

Related servers

Questions about Hyperion

Enforce policy on every Hyperion tool call.