# DataNexusAI EU Yield Curve Slope

> DataNexusAI EU Yield Curve Slope is a paid API for AI agents from api.datanexusai.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-28).

Returns the current EU yield curve slope (10y-2y spread in percentage points) and the derived market regime classification (e.g. normal, inverted).

## Facts

- Endpoint: GET https://api.datanexusai.org/api/v1/rates/eu-curve-slope?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/datanexusai-eu-yield-curve-slope-b2ab1886
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zD39tsgjPIcmJU8MJoITU

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 datanexusai-eu-yield-curve-slope-b2ab1886
```

Example prompt: What is the current EU yield curve slope — specifically the 10-year minus 2-year spread — and is the curve in a normal or inverted regime right now?

## When to prefer this

Use this endpoint when you need a quick, pre-computed EU yield curve slope and regime classification without having to fetch and process raw bond yield data yourself. It is ideal for macro dashboards, automated trading signals, and research pipelines that need a single derived number and a regime label rather than full yield curve term structure data. Prefer it over general-purpose financial data APIs when you specifically need the EU 10y-2y spread with a built-in regime interpretation at very low cost per call.

## Known failure modes

- Payment failure (402): USDC micropayment of $0.01 not provided or rejected via x402 protocol
- Data unavailable: upstream EU bond market data source temporarily offline
- Rate limiting: too many requests in a short window
- Malformed request: unsupported HTTP method used

## How this service works

Public data API for SEBRA payments, PTP road accidents, Hearthstone cards, EU agri-food prices, and trade/market analytics. Paid data endpoints use x402 (USDC micropayments). Docs and discovery endpoints are free.

Machine-readable discovery: `https://api.datanexusai.org/openapi.json`, `https://api.datanexusai.org/llms.txt`, `https://api.datanexusai.org/.well-known/x402`.

Human docs: `/docs` and `/api/`.

## Output

A JSON object containing the derived market regime label (e.g. 'normal' or 'inverted'), the 10-year minus 2-year EU yield curve slope expressed in percentage points, and the endpoint identifier string.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "derived": {
   "regime": "normal",
   "slope_10y_2y_pp": 0.45
  },
  "endpoint": "eu_curve_slope"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/datanexusai-eu-yield-curve-slope-b2ab1886/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.datanexusai.org](https://www.zero.xyz/host/api.datanexusai.org/llms.txt)