# NOB7E Evidence Verdict

> NOB7E Evidence Verdict is a paid API for AI agents from evidence-verdict-production.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Evaluates a claim or question against a supplied HTML or PDF source URL and returns anchored evidence supporting or refuting it.

## Facts

- Endpoint: POST https://evidence-verdict-production.up.railway.app/v1/evidence/verdict?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nob7e-evidence-verdict-7791d48d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mW1f9Hwj8N8ZqOqCzwOMu

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 nob7e-evidence-verdict-7791d48d -d '<json body>'
```

Example prompt: Check whether the claim 'Global CO2 emissions rose by 1% in 2023' is supported by the evidence at https://iea.org/reports/co2-emissions-in-2023 and show me the anchored passages that back it up or contradict it.

## When to prefer this

Choose this endpoint when you need to evaluate a specific claim or question against a single, known source document (HTML page or PDF) and require anchored, passage-level evidence rather than a general web search or multi-source synthesis. It is ideal for fact-checking workflows, compliance verification, academic citation checking, or any scenario where traceability back to a specific document is critical. Prefer alternatives if you need to search across multiple sources, perform open-web retrieval, or handle structured data extraction without a specific claim to evaluate.

## Known failure modes

- Source URL is inaccessible or returns a non-200 status — verdict cannot be generated
- URL points to a non-HTML/non-PDF resource (e.g. video, spreadsheet) — parsing may fail
- Claim and question both null — request rejected due to missing required input
- Source document does not contain relevant content for the claim — verdict returned as 'insufficient evidence'
- PDF is scanned/image-based with no extractable text — evidence anchoring fails
- Claim exceeds 4000 character limit — request rejected with validation error
- Payment of 0.01 USDC not included or rejected — 402 Payment Required response

## How this service works

Evaluate a claim or question against one supplied HTML or PDF source and return anchored evidence.

## Output

Returns a verdict on whether the supplied claim or question is supported, refuted, or unresolved based on the content found at the provided URL, along with anchored evidence passages (quoted or referenced text from the source) that justify the verdict.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "claim": {
   "anyOf": [
    {
     "type": "string",
     "pattern": "^\\s*\\S[\\s\\S]{1,3998}\\S\\s*$",
     "description": "Leading and trailing whitespace is stripped; the remaining value must contain 3 to 4000 characters."
    },
    {
     "type": "null"
    }
   ],
   "title": "Claim",
   "default": null,
   "description": "Claim to evaluate. Provide claim or question, never both."
  },
  "question": {
   "anyOf": [
    {
     "type": "string",
     "pattern": "^\\s*\\S[\\s\\S]{1,3998}\\S\\s*$",
     "description": "Leading and trailing whitespace is stripped; the remaining value must contain 3 to 4000 characters."
    },
    {
     "type": "null"
    }
   ],
   "title": "Question",
   "default": null,
   "description": "Question to answer. Provide question or claim, never both."
  },
  "source_url": {
   "type": "string",
   "title": "Source Url",
   "format": "uri",
   "pattern": "^[Hh][Tt][Tt][Pp][Ss]?://",
   "maxLength": 2048,
   "minLength": 1,
   "description": "Public HTTP(S) URL of one ordinary HTML page or PDF."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nob7e-evidence-verdict-7791d48d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from evidence-verdict-production.up.railway.app](https://www.zero.xyz/host/evidence-verdict-production.up.railway.app/llms.txt)