# ECB Euro Area AAA Government Bond Yield Curve

> ECB Euro Area AAA Government Bond Yield Curve is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-16).

Returns the ECB-estimated zero-coupon yield curve for euro area AAA government bonds (3M to 30Y maturities), with basis-point changes versus N days ago and the 10Y-2Y slope.

## Facts

- Endpoint: POST https://api.vextorium.com/curva-bonos-eurozona-pago?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ecb-euro-area-aaa-government-bond-yield-curve-4b710237
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xxtN2AH7rlloB4-jsz62g

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 ecb-euro-area-aaa-government-bond-yield-curve-4b710237 -d '<json body>'
```

Example prompt: Show me today's ECB zero-coupon yield curve for AAA euro area government bonds across all maturities from 3 months to 30 years, with the basis-point change versus 30 days ago and the 10Y-2Y slope.

## When to prefer this

Choose this endpoint when you need the official ECB-sourced zero-coupon yield curve for euro area AAA sovereign bonds, especially when you want standardized basis-point change comparisons across a configurable lookback window and the 10Y-2Y slope metric in a single call. Prefer it over generic bond data APIs when ECB provenance and zero-coupon methodology are required, or when building eurozone rate monitoring or fixed-income dashboards.

## Known failure modes

- ECB source data unavailable or delayed — may return null values for some maturities
- Invalid dias_comparar value (must be integer 1-365) — request fails or uses default
- Network timeout if ECB upstream is slow
- Comparison date falls outside available ECB data range — null comparado_con or null cambio_pb values

## How this service works

Euro area AAA government bond yield curve (zero-coupon, 3 months to 30 years) estimated by the ECB, with change in basis points versus N days ago and the 10y-2y slope.

## Output

A JSON object containing: an array of yield curve data points (each with maturity label like '3M','1Y','10Y', zero-coupon yield percentage, and change in basis points vs the comparison date), the current date, the comparison date, the source label ('Banco Central Europeo'), and the 10Y-2Y slope in basis points.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "dias_comparar": {
   "type": "integer",
   "description": "1-365, default 30"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "curva": [
   {
    "plazo": "3M",
    "tipo_pct": 2.5074,
    "cambio_pb": 8.6
   },
   {
    "plazo": "6M",
    "tipo_pct": 2.6913,
    "cambio_pb": 13.6
   },
   {
    "plazo": "1Y",
    "tipo_pct": 2.922,
    "cambio_pb": 19.3
   },
   {
    "plazo": "2Y",
    "tipo_pct": 3.1065,
    "cambio_pb": 23
   },
   {
    "plazo": "3Y",
    "tipo_pct": 3.169,
    "cambio_pb": 23.7
   },
   {
    "plazo": "5Y",
    "tipo_pct": 3.269,
    "cambio_pb": 24.3
   },
   {
    "plazo": "7Y",
    "tipo_pct": 3.3986,
    "cambio_pb": 24.6
   },
   {
    "plazo": "10Y",
    "tipo_pct": 3.5922,
    "cambio_pb": 23.7
   },
   {
    "plazo": "15Y",
    "tipo_pct": 3.8122,
    "cambio_pb": 19.7
   },
   {
    "plazo": "20Y",
    "tipo_pct": 3.9008,
    "cambio_pb": 14.5
   },
   {
    "plazo": "30Y",
    "tipo_pct": 3.835,
    "cambio_pb": 4.8
   }
  ],
  "fecha": "2026-10-01",
  "fuente": "Banco Central Europeo, curva de rendimientos de la zona del euro (bonos AAA)",
  "comparado_con": "2026-09-01",
  "pendiente_10a_2a_pb": 48.6
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ecb-euro-area-aaa-government-bond-yield-curve-4b710237/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)