# x402 Endpoint Risk Oracle

> x402 Endpoint Risk Oracle is a paid API for AI agents from x402-market-intel-mcp.mtree.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-13).

Pre-payment risk assessment for a single x402 paid API endpoint: returns a pay/block/cap verdict, 402 term compliance warnings, execution policy, and replay/binding checks before an agent commits payment.

## Facts

- Endpoint: POST https://x402-market-intel-mcp.mtree.workers.dev/v1/x402/endpoint_risk
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-endpoint-risk-oracle-3812ce1c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qB7g5W5VrVwuHbqqi3o33

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 x402-endpoint-risk-oracle-3812ce1c -d '<json body>'
```

Example prompt: Before my agent pays for this x402 API call, run a risk check on https://some-api.example.com/v1/data — I want to know whether to pay, block, or cap, and see any warnings about the 402 terms or replay risks.

## When to prefer this

Use this endpoint when an AI agent is about to pay for an unknown or untrusted x402 API call and needs a pre-payment safety check. Prefer it over general API validation tools when the specific concern is x402 payment terms, replay risk, seller binding, and cap/block decisions for micropayment routes.

## Known failure modes

- Invalid or unreachable endpoint URL returns an error verdict
- Malformed x402 headers on target endpoint may produce incomplete term checks
- Payment of $0.03 USDC on Base required for full report; missing payment returns free preview only
- Network timeout on target endpoint inspection returns partial results

## How this service works

Tiny paid pre-payment oracle for one x402 endpoint: returns pay/block/cap verdict first, warnings and exact 402 term checks second, then execution policy, replay/binding checks, and seller fix appendix. Free preview includes paid_request_body + preview_id; paid route is now $0.03 to match try-it conversion pricing. Price 0.03 USDC on Base via x402. Demo: https://x402-market-intel-mcp.mtree.workers.dev/demo/endpoint_risk. Contact: https://x402-market-intel-mcp.mtree.workers.dev/contact.

## Output

Returns a structured verdict of pay, block, or cap; a list of warnings about the endpoint's 402 payment terms; execution policy details; replay and binding check results; and a seller fix appendix. Free preview includes the paid_request_body and a preview_id for the paid route.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string"
      },
      "resource": {
       "type": "string"
      },
      "method": {
       "type": "string"
      },
      "budget_usdc": {
       "type": "number"
      },
      "preview_id": {
       "type": "string"
      },
      "source": {
       "type": "string"
      }
     }
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   },
   "required": [
    "type"
   ]
  }
 },
 "required": [
  "input"
 ]
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "verdict": "manual_review",
  "risk_flags": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-endpoint-risk-oracle-3812ce1c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-market-intel-mcp.mtree.workers.dev](https://www.zero.xyz/host/x402-market-intel-mcp.mtree.workers.dev/llms.txt)