# IMPERIUM PREFLIGHT – Multi-Protocol Readiness Auditor (x402, ERC-8004, IETF MPP)

> IMPERIUM PREFLIGHT – Multi-Protocol Readiness Auditor (x402, ERC-8004, IETF MPP) is a paid API for AI agents from preflight.agentdiet.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-11-01).

Runs an automated 8-gate pre-flight readiness audit against a given HTTP endpoint to verify compliance with x402 v2, Dexter gas floor, IETF MPP, MCP Streamable HTTP, A2A v0.3.0 agent cards, OASF records, and ERC-8004 identity standards.

## Facts

- Endpoint: GET https://preflight.agentdiet.dev/v1/mpp-verifier?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/imperium-preflight-multi-protocol-readiness-auditor-x402-erc-8004-e54c0dda
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VvTtlfRxCyOvYHWB5jYUf

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-readiness-auditor-x402-erc-8004-e54c0dda
```

Example prompt: Can you run a pre-flight compliance audit on https://api.myservice.dev/payments using a GET request — I need to know if it passes all 8 gates for x402 v2, ERC-8004 identity, IETF MPP, and A2A v0.3.0 before I go live?

## When to prefer this

Choose this endpoint when you need a single automated pass that checks compliance across multiple emerging agent and payment protocols simultaneously (x402 v2, ERC-8004, IETF MPP, A2A, MCP, OASF) rather than running separate validators for each standard. Especially valuable before listing an API on a facilitator marketplace or deploying a payment-gated agent service.

## Known failure modes

- Target URL is unreachable or returns no response — audit cannot complete
- Target endpoint does not expose required protocol headers — gates fail with missing-header errors
- Invalid or malformed URL passed as query parameter — returns 400-level error
- Target endpoint actively blocks automated probes — may return partial or inconclusive gate results
- Compliance standards evolve and endpoint may be audited against a stale ruleset if not updated

## 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 top-level status field ('ok' or error), a data object containing gate-by-gate compliance results for each of the 8 audited standards, and an roi_proof object including a compression_ratio_pct metric indicating how efficiently the audit results are encoded.

## 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"
      }
     }
    }
   },
   "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-readiness-auditor-x402-erc-8004-e54c0dda/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)