# IMPERIUM PREFLIGHT – Multi-Protocol Agent Readiness Auditor

> IMPERIUM PREFLIGHT – Multi-Protocol Agent Readiness Auditor is a paid API for AI agents from preflight.agentdiet.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).

Runs an automated 8-gate pre-flight readiness audit against x402 v2, IETF MPP, MCP Streamable HTTP, A2A v0.3.0, OASF, ERC-8004, and related agent-payment standards for a given URL or endpoint.

## Facts

- Endpoint: GET https://preflight.agentdiet.dev/v1/context-compress?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/imperium-preflight-multi-protocol-agent-readiness-auditor-629c3a96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2z5QwJuQOWSF1-GwJ5Qha

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability imperium-preflight-multi-protocol-agent-readiness-auditor-629c3a96
```

Example prompt: Run the IMPERIUM PREFLIGHT 8-gate readiness audit on https://myagent.example.com/payments using a GET request and tell me which protocol gates pass or fail.

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-standard compliance check across all major agent-payment and agent-identity protocols (x402, IETF MPP, ERC-8004, MCP, A2A, OASF) in a single call. Prefer it over manual per-standard validators when you want a consolidated pass/fail report with compression metrics before deploying or listing an agent service.

## Known failure modes

- Target URL unreachable or times out — audit cannot complete
- Invalid or missing 'input' object with required type and method fields — returns validation error
- Unsupported HTTP method passed in enum — schema rejection
- Target endpoint returns non-standard headers that block gate checks
- Payment not received (x402 flow fails) — endpoint returns 402 before audit runs

## How this service works

Automated 8-gate pre-flight readiness auditor for x402 v2, Dexter gas floor, IETF MPP, MCP Streamable HTTP, A2A v0.3.0 agent cards, OASF records, and ERC-8004 identity.

## Output

Returns a JSON object with a status field ('ok'), a data object containing per-gate audit results for all 8 protocol checks (x402 v2, Dexter gas floor, IETF MPP, MCP Streamable HTTP, A2A v0.3.0, OASF, ERC-8004, and related), and an roi_proof object including a compression_ratio_pct metric (e.g. 91.4%).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string"
      },
      "mode": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "status": "ok",
  "roi_proof": {
   "compression_ratio_pct": 91.4
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/imperium-preflight-multi-protocol-agent-readiness-auditor-629c3a96/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from preflight.agentdiet.dev](https://www.zero.xyz/host/preflight.agentdiet.dev/llms.txt)