# Signal Ledger Author Scorecard

> Signal Ledger Author Scorecard is a paid API for AI agents from 43-135-4-66.sslip.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns a historical accuracy scorecard for a given X (Twitter) financial analyst handle, including hit/miss rates and confidence intervals on their past claims.

## Facts

- Endpoint: GET https://43-135-4-66.sslip.io/v1/authors/%7Bhandle%7D/scorecard
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signal-ledger-author-scorecard-905f0ec0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8PPWtUckAziFg24XnF_lH

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 signal-ledger-author-scorecard-905f0ec0
```

Example prompt: Can you pull up the Signal Ledger scorecard for the X account @BillBrooklyn10 and show me their historical stock-call hit rate over all available data?

## When to prefer this

Use this endpoint when you need to assess the credibility or track record of a specific X/Twitter financial commentator before relying on their analysis. It is uniquely suited for AI agents doing pre-research due diligence on named authors, as it provides empirically scored hit/miss rates with statistical confidence intervals — not just follower counts or sentiment. Prefer this over generic web search when you need structured, evidence-linked historical accuracy data for a known handle.

## Known failure modes

- Handle not found or no data — returns 404 or empty scorecard if the author has no tracked claims
- Invalid handle format — pattern must match ^[A-Za-z0-9_]{1,15}$, returns 400 for malformed input
- Payment failure — endpoint requires $0.02 USDC via x402 protocol; missing or invalid payment returns 402
- No resolved claims — scorecard may return with zero hits/misses if all claims are still unresolved
- window_days out of range — values below 1 or above 3650 are rejected

## How this service works

Agent-searchable, evidence-linked financial-report risk checks and historical author scorecards. 面向 AI Agent 的可追溯财报风险体检与作者历史成绩查询。Research support only; not investment advice.

## Output

Returns a JSON object with the author's name and handle, claim coverage stats (total claims, resolved claims, unique instruments), and performance metrics including hits, misses, hit rate, and a 95% confidence interval for the hit rate.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "handle"
     ],
     "properties": {
      "handle": {
       "type": "string",
       "pattern": "^[A-Za-z0-9_]{1,15}$",
       "description": "X creator handle without @"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "type": {
       "enum": [
        "all",
        "stock",
        "industry",
        "market"
       ],
       "type": "string",
       "default": "all"
      },
      "window_days": {
       "type": "integer",
       "default": 3650,
       "maximum": 3650,
       "minimum": 1
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "scorecard": {
   "author": {
    "name": "Bill Brooklyn",
    "handle": "BillBrooklyn10"
   },
   "coverage": {
    "total_claims": 100,
    "resolved_claims": 60,
    "unique_instruments": 25
   },
   "performance": {
    "hits": 24,
    "misses": 36,
    "hit_rate": 0.4,
    "confidence_interval_95": {
     "lower": 0.2856,
     "upper": 0.5264
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signal-ledger-author-scorecard-905f0ec0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 43-135-4-66.sslip.io](https://www.zero.xyz/host/43-135-4-66.sslip.io/llms.txt)