ToolVet
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Eu Yield Curve

by eu-verify in Markets & finance

x402 APIPassing, checked 35 min ago

Latest euro area risk-free spot yields from the ECB Data Portal (dataset YC, AAA-rated central government bonds, Svensson model; updated each business day ~12:00 CET). Query: ?tenors=3M,1Y,2Y,5Y,10Y,30Y (1-8 tenors from 3M to 30Y). Returns yields_pct per tenor, observation date, and the 2s10s spread in bp when 2Y and 10Y are requested. 1h cache.

GET
https://data.greeneris.io/v1/eu/yield-curve
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
332 ms
398 ms slowest 5%
Last check
Passed
35 min ago, next any minute now

Run a free test callHow to call it

Reliability

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Status and outage history · Atom feed

How to call it

GET https://data.greeneris.io/v1/eu/yield-curve

Each call costs $0.005 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://data.greeneris.io/v1/eu/yield-curve?tenors=3M%2C1Y%2C2Y%2C5Y%2C10Y%2C30Y

Parameters

ParameterTypeRequiredDescription
tenorsstringNoComma-separated tenors (1-8) among 3M,6M,9M,1Y..10Y,15Y,20Y,25Y,30Y Default: "3M,1Y,2Y,5Y,10Y,30Y".

Example response

The provider's example. We can't check it without paying.

{
  "date": "2026-07-09",
  "source": "ECB Data Portal, dataset YC (euro area AAA central government bonds, Svensson spot rates)",
  "spread_2s10s_bp": 51.46,
  "yields_pct": {
    "10Y": 3.1292,
    "1Y": 2.5258,
    "2Y": 2.6146,
    "30Y": 3.6265,
    "3M": 2.3222,
    "5Y": 2.7629
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://data.greeneris.io/v1/eu/yield-curve?tenors=3M%2C1Y%2C2Y%2C5Y%2C10Y%2C30Y'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://data.greeneris.io/v1/eu/yield-curve?tenors=3M%2C1Y%2C2Y%2C5Y%2C10Y%2C30Y' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdata.greeneris.io%2Fv1%2Feu%2Fyield-curve
const res = await pay("https://data.greeneris.io/v1/eu/yield-curve?tenors=3M%2C1Y%2C2Y%2C5Y%2C10Y%2C30Y");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://data.greeneris.io/v1/eu/yield-curve?tenors=3M%2C1Y%2C2Y%2C5Y%2C10Y%2C30Y")
    print(res.status_code, res.text)

Security scan

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Recent checks

WhenResultHTTPTimePrice
35 min agoPassed402325 ms$0.005
5 h agoPassed402352 ms$0.005
9 h agoPassed402177 ms$0.005
13 h agoPassed402178 ms$0.005
18 h agoPassed402201 ms$0.005
Show 10 older checks
22 h agoPassed402339 ms$0.005
26 h agoPassed402179 ms$0.005
30 h agoPassed402367 ms$0.005
33 h agoPassed402334 ms$0.005
37 h agoPassed402337 ms$0.005
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2 days agoPassed402329 ms$0.005
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2 days agoPassed402345 ms$0.005