# Crypto Strategy Evidence & Track Record

> Crypto Strategy Evidence & Track Record is a paid API for AI agents from agentdata-api.sander-van-aard.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Returns historical performance statistics for a crypto trading strategy (and specific coin), including win rate with Wilson confidence interval, return metrics, and ML model status.

## Facts

- Endpoint: POST https://agentdata-api.sander-van-aard.workers.dev/crypto/evidence
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-strategy-evidence-track-record-2301d5c9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dI07eE1z4StZd-Vp42rIE

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 crypto-strategy-evidence-track-record-2301d5c9 -d '<json body>'
```

Example prompt: Before I act on this crypto opportunity, pull the historical evidence for its strategy — I want to see the win rate with confidence interval, average net return, and how many completed trades back it up.

## When to prefer this

Use this endpoint when you need statistically grounded historical performance evidence for a crypto strategy before acting on an opportunity — especially when you want a Wilson-corrected win rate, not just raw counts. Prefer this over simple win/loss tallies when you need confidence intervals and return distribution metrics to assess signal reliability.

## Known failure modes

- Insufficient sample size yields wide Wilson confidence intervals, making the win rate estimate unreliable
- Unknown or unsupported strategy type returns an error or empty evidence object
- Coin-level breakdown unavailable if not enough samples exist for that coin
- Payment not processed correctly returns 402 or authorization error
- Malformed request body or missing required fields returns a validation error
- Measurement window may be short, limiting statistical significance of returned metrics

## How this service works

Historical evidence behind a crypto opportunity: for its strategy (and coin where enough samples exist) the measured populations — detected, blocked, published, expired without entry, completed, wins, losses, time exits — plus win rate over completed outcomes only with a Wilson interval, average/median/total net return, distinct days and coins, ML model evidence status and the measurement window. Real measurements, never fabricated; short windows have wide error bars. Paid per request.

## Output

A JSON object containing population counts (detected, blocked, published, expired without entry, completed, wins, losses, time exits), win rate with Wilson confidence interval upper/lower bounds computed over completed outcomes only, average net return, median net return, total net return, number of distinct days and coins in the sample, ML model evidence status, and the measurement window — all derived from real historical measurements, never fabricated.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": {
      "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/crypto-strategy-evidence-track-record-2301d5c9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdata-api.sander-van-aard.workers.dev](https://www.zero.xyz/host/agentdata-api.sander-van-aard.workers.dev/llms.txt)