Financial Data API

Fixed Income Data API — Bonds, Yield Curves & Credit Ratings

Government bonds, corporate bonds, municipal bonds. Yield curves and credit ratings from S&P, Moody's, Fitch.

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Coverage

Full fixed income coverage

Government Bonds

Sovereign debt across 50+ countries. Benchmark yields and prices

Corporate Bonds

Investment-grade and high-yield. ISIN lookup and pricing

Municipal Bonds

US munis, state and local government debt

Yield Curves

Daily yield curves by country. Spot and forward rates

Credit Ratings

S&P, Moody's, Fitch. Issuer and instrument-level

500K+ Bonds

Comprehensive universe. Search by ISIN, CUSIP, name

Endpoint Examples

Simple REST endpoints

GET /v1/bonds/yield-curve/{country}

Terminal
$
curl https://api.eulerpool.com/v1/bonds/yield-curve/US \
-H "Authorization: Bearer ep_live_xxx"

  "country":   "US",
  "date":     "2025-02-20",
  "tenors":   1, 2, 5, 10, 30,
  "yields":   4.52, 4.38, 4.21, 4.15, 4.42
200 OK — 9ms

GET /v1/bonds/{isin}/price

Bond price, yield, duration by ISIN. Supports government, corporate, municipal

GET /v1/bonds/search

Search by ISIN, CUSIP, issuer name, or bond description

Key Stats

Coverage at scale

50+

Countries

500K+

Bonds

Daily

Yield Curves

S&P / M / F

Credit Ratings

Frequently asked questions

Eulerpool covers government bonds, corporate bonds, municipal bonds, and money market instruments across 50+ countries. Data includes yield curves, credit spreads, bond prices, coupon rates, maturity dates, credit ratings, and issuance details. Both real-time and historical data are available.

Yes. The yield curve endpoint provides benchmark government yield curves (US Treasury, Bund, Gilt, JGB) across all standard tenors from 1 month to 30 years. Historical yield curves are available for 20+ years. Data is suitable for fixed income analytics, duration calculations, and interest rate modeling.

Yes. Corporate bond coverage includes investment-grade and high-yield bonds with pricing, yield-to-maturity, credit spreads, ratings (Moody's, S&P, Fitch), and bond characteristics. You can search bonds by issuer, rating, maturity, or sector.

Yes. The data includes the fields needed for duration, convexity, OAS, and VaR calculations. Historical data is point-in-time for accurate risk model backtesting. Many buy-side and sell-side firms use Eulerpool for fixed income risk analytics and regulatory reporting.

Call the bond endpoint with country and tenor parameters to get current and historical sovereign yields. Credit spreads over benchmarks are pre-calculated. The API covers 50+ countries including developed and emerging markets. Data updates intraday for active markets.

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