# EU ESTR Rate Lookup

> EU ESTR Rate Lookup is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Retrieves the latest Euro Short-Term Rate (ESTR) fixings published by the European Central Bank, with optional daily transaction volume.

## Facts

- Endpoint: GET https://data.greeneris.io/v1/eu/estr
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/eu-estr-rate-lookup-67745f75
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NAcw6ZnPvNiEyUzMFAeoZ

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 eu-estr-rate-lookup-67745f75
```

Example prompt: What is today's ESTR fixing from the ECB? Give me the last 3 observations including daily transaction volume in EUR millions.

## When to prefer this

Use this endpoint when you need authoritative, ECB-published ESTR benchmark interest rate data for the euro area — ideal for financial calculations, loan pricing, derivatives referencing, invoicing discount rates, or macro monitoring. Prefer over generic data aggregators when official ECB sourcing is required.

## Known failure modes

- HTTP 402 returned if payment not attached — machine-readable quote for USDC payment via x402
- Empty observations if queried before ECB publishes that day's fixing (~08:00 CET)
- last_n out of range (must be 1-30) may return validation error
- Non-TARGET2 business days (weekends, ECB holidays) have no new fixings

## How this service works

Euro Short-Term Rate (ESTR), the official euro overnight benchmark, direct from the ECB Data Portal (dataset EST, published each TARGET2 business day ~08:00 CET). Query: ?last_n=5 (1-30 fixings, default 1) &include_volume=true to add the underlying transaction volume in EUR millions. Returns date-sorted observations plus the latest fixing; 1h cache.

## Output

Returns a JSON object with the latest ESTR rate(s) including fixing date and rate in percent per annum; optionally includes daily transaction volume in EUR millions. Data sourced from ECB, published each TARGET2 business day around 08:00 CET.

## 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": {
      "last_n": {
       "type": "integer",
       "default": 1,
       "description": "Number of most recent fixings (1-30)"
      },
      "include_volume": {
       "type": "boolean",
       "default": false,
       "description": "Also return daily transaction volume in EUR millions"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "rate": "ESTR (euro short-term rate), volume-weighted trimmed mean, percent per annum",
  "source": "European Central Bank Data Portal, dataset EST (published each TARGET2 business day ~08:00 CET)",
  "latest_date": "2026-07-10",
  "observations": [
   {
    "date": "2026-07-10",
    "rate_percent": 2.182,
    "volume_eur_millions": 64378
   }
  ],
  "latest_rate_percent": 2.182
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/eu-estr-rate-lookup-67745f75/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.greeneris.io](https://www.zero.xyz/host/data.greeneris.io/llms.txt)