# US Grid Reliability Gauge by Balancing Authority (EIA-930)

> US Grid Reliability Gauge by Balancing Authority (EIA-930) is a paid API for AI agents from aeml-x402.zeabur.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-13).

Returns a multi-leg operational strain gauge for a US power grid balancing authority, covering forecast pressure, current tightness, and realized stress signals derived from EIA-930 data.

## Facts

- Endpoint: GET https://aeml-x402.zeabur.app/gauge/grid-reliability-region
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-grid-reliability-gauge-by-balancing-authority-eia-930-68adba33
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tY5Yv9XGKiHq8YARBljiI

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 us-grid-reliability-gauge-by-balancing-authority-eia-930-68adba33
```

Example prompt: What's the current operational strain level for ERCOT right now — show me the forecast pressure, supply margin, and whether imports are elevated, so I can assess grid reliability risk for our Texas data center.

## When to prefer this

Use this endpoint when you need a consolidated, causally-linked view of US grid operational strain for a specific balancing authority — combining day-ahead demand forecasts, real-time supply margin, interchange reliance, and forecast error cross-validation in one call. Prefer this over raw EIA-930 API queries when you need pre-computed strain indicators with provenance, freshness tracking, and honest scope disclosures ready for agent consumption. Ideal for data-center/AI-compute siting decisions, demand-response agent triggers, parametric insurance underwriting, and energy-intensive industrial scheduling. Not appropriate when you need confirmed outage data or feeder-level fault information.

## Known failure modes

- Missing or invalid EIA_API_KEY returns an auth/key error — endpoint is key-gated
- Unknown or unsupported entity key returns an error or empty legs
- EIA-930 data latency may cause stale freshness flags if upstream feed is delayed
- Endpoint confirms operational strain only — does not report actual outages or feeder-level failures
- Some signals may have elevated data_age_hours if EIA publishes infrequently

## How this service works

[3-LEG] Grid reliability chain, one balancing authority (?entity=us-ercot): leading EIA-930 day-ahead demand forecast approaching recent peak, about one day of lead -> current current demand against capacity tightness -> realized reserve and interchange response (confirmation gate). A sequential chain, not one reading - confidence = how many legs are lit, in order. Sources: US EIA-930. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed.

## Output

A structured JSON object with multi-leg signal readings (forecast pressure, operational tightness, realized strain), a cross-line narrative describing grid state, provenance metadata with freshness indicators, data lineage traceable to EIA-930, decision points for alternative entity queries, and a citation block with Ed25519-signed claims for zero-trust verification. Includes honest scope/grade disclosures noting this reflects operational strain, not outage data.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "entity"
     ],
     "properties": {
      "entity": {
       "type": "string",
       "examples": [
        "caiso",
        "ercot",
        "miso",
        "pjm",
        "spp",
        "nyiso"
       ],
       "description": "required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals[0].entities[]",
       "x-accepted-values": {
        "all": "https://api.truthbear.co/schemas/gauge-grid-reliability-region.input.json",
        "shown": 6,
        "total": 18
       }
      }
     },
     "additionalProperties": false
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "const": "json"
    },
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-grid-reliability-gauge-by-balancing-authority-eia-930-68adba33/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aeml-x402.zeabur.app](https://www.zero.xyz/host/aeml-x402.zeabur.app/llms.txt)