# Second Opinion Quick Verify

> Second Opinion Quick Verify is a paid API for AI agents from second-opinion-production.up.railway.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-18).

Performs a fast, reasoning-only logical consistency check on a claim without live web research, returning a verdict or honest 'inconclusive' when live data is needed.

## Facts

- Endpoint: POST https://second-opinion-production.up.railway.app/v1/verify/quick?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/second-opinion-quick-verify-d4cc6aa2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lvGBxEQyhhy-_V9nwB6XK

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 second-opinion-quick-verify-d4cc6aa2 -d '<json body>'
```

Example prompt: Can you do a quick reasoning-only check on this claim — 'Coffee consumption directly causes heart disease' — and tell me if it holds up logically or is inconsistent with established knowledge?

## When to prefer this

Choose this endpoint when you need a fast, offline logical consistency check on a claim and do not require live web research. Prefer it over the full adversarial 'Second Opinion' endpoint when speed matters, cost should be minimized ($0.02 vs higher), or the claim can be evaluated purely through reasoning and established knowledge. Ideal for screening claims before deeper research, validating arguments for internal consistency, or when internet access is unavailable or undesired.

## Known failure modes

- Claim requires live data or real-time information, resulting in an honest 'inconclusive' verdict rather than an error
- Input body missing required fields causes validation error
- Malformed JSON body returns 400-level error
- Claim is too ambiguous to reason about without context, may yield inconclusive or low-confidence result
- Payment not included or insufficient USDC amount returns 402 Payment Required

## How this service works

Second Opinion quick: an independent reasoning-only check (no web research) of your claim's logic and consistency with established knowledge. Honest 'inconclusive' when the claim needs live research.

## Output

Returns a structured verdict on the claim's logical consistency and alignment with established knowledge — either confirming it is consistent, flagging specific logical flaws or contradictions, or returning 'inconclusive' when the claim genuinely requires live research or real-time data to assess properly.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "bodyType",
    "body",
    "method"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "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/second-opinion-quick-verify-d4cc6aa2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from second-opinion-production.up.railway.app](https://www.zero.xyz/host/second-opinion-production.up.railway.app/llms.txt)