# Agentics Service Score History

> Agentics Service Score History is a paid API for AI agents from x402rail.net, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-20).

Retrieves the historical correctness/quality score time series for a specific AI agent service by its serviceId

## Facts

- Endpoint: GET https://x402rail.net/v1/score/%7BserviceId%7D/history?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentics-service-score-history-232825da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9Dn9ZQebkL_14XkRjjz1g

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 agentics-service-score-history-232825da
```

Example prompt: Pull up the correctness score history for the service with ID 'demo-service' on Agentics so I can see how its reliability scores have trended over recent evaluations.

## When to prefer this

Use this endpoint when you need to audit, monitor, or trend-analyze the correctness scores of a specific AI agent service over time — particularly when evaluating whether a service's reliability is improving or degrading before routing agent workloads to it.

## Known failure modes

- Invalid or unknown serviceId returns an error or empty points array
- Malformed serviceId path parameter may return a 400 or 404
- Service has no scoring history yet resulting in an empty points array
- Payment failure or insufficient funds returns a 402 Payment Required
- Rate limiting may return a 429 if called too frequently

## How this service works

Correctness-critical services for autonomous AI agents

## Output

Returns a JSON object containing the serviceId and an array of score history points, each with a numeric score (e.g. 92.4) and a computedAt ISO timestamp indicating when that score was calculated.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "points": [
   {
    "score": 92.4,
    "computedAt": "2026-06-18T12:00:00.000Z"
   },
   {
    "score": 91.8,
    "computedAt": "2026-06-18T11:30:00.000Z"
   }
  ],
  "serviceId": "demo-service"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentics-service-score-history-232825da/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402rail.net](https://www.zero.xyz/host/x402rail.net/llms.txt)