# Midax402 Standard x402 Intelligence

> Midax402 Standard x402 Intelligence is a paid API for AI agents from midax402.onrender.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Answers natural-language questions about the x402 payment ecosystem using dual-LLM cross-validation with conservative confidence calibration, returning 'uncertain' for thin-evidence queries rather than overconfident verdicts

## Facts

- Endpoint: GET https://midax402.onrender.com/midas-ops/standard
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/midax402-standard-x402-intelligence-9b0f3fc4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vIMSw5jPcFFOBcpPMrpee

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 midax402-standard-x402-intelligence-9b0f3fc4
```

Example prompt: Ask Midax402 to compare CDP, XPay, Circle Nano, and thirdweb as x402 facilitators — I want to know which one is safest for agent-to-agent micropayments on Base and how each handles the Five Attacks security model.

## When to prefer this

Choose this endpoint when you need authoritative, cross-validated answers specifically about the x402 payment protocol ecosystem — including facilitator comparisons (CDP, XPay, Circle Nano, thirdweb, Agenticpay, x402-rs), security mitigations, Base Mainnet infrastructure, MCP/A2A/ERC-8004 standards, or agent commerce pricing. Prefer it over the sibling 'Evidence+' endpoint for standard queries where expanded corpus retrieval is not needed. The conservative calibration (returning 'uncertain' rather than hallucinating) makes it trustworthy for agent decision-making pipelines.

## Known failure modes

- Query falls outside supported domains (payment flow, facilitators, security, standards, micropayments, SDK, infrastructure) — returns uncertain or error
- Ambiguous or too-broad query yields 'uncertain' verdict by design
- Service unavailable due to Render cold start latency
- Payment not processed — endpoint returns 402 Payment Required before responding
- Both LLMs disagree without resolution — conservative uncertain verdict returned

## How this service works

Midax402: x402 intelligence with dual-LLM cross-validation — facilitators, market signals, agent commerce, and multi-model synthesis on Base.

## Output

A cross-validated answer synthesized from two LLMs, including a confidence verdict ('useful' or 'uncertain'), facilitator comparisons, security analysis, market signals, or protocol explanations about the x402 ecosystem on Base Mainnet. Thin-evidence or exploratory queries return 'uncertain' rather than a fabricated answer.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "query"
     ],
     "properties": {
      "query": {
       "type": "string",
       "description": "x402 ecosystem question. Supported domains: payment flow and headers, facilitator comparison (CDP/XPay/Circle Nano/thirdweb/Agenticpay/x402-rs), security mitigations (Five Attacks, PII, prompt injection), standards (MCP, A2A, ERC-8004), micropayments/pricing, SDK integration, and infrastructure analysis across the x402 ecosystem."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/midax402-standard-x402-intelligence-9b0f3fc4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from midax402.onrender.com](https://www.zero.xyz/host/midax402.onrender.com/llms.txt)