I-Bond Rates API
I-Bond Rates provides current and historical interest rates for US Series I Savings Bonds. I-Bonds are inflation-protected savings bonds with a composite rate made up of a fixed rate plus an inflation rate that adjusts every 6 months.
Live Test API
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API Request
API Response
123456789101112131415161718192021{ "status": "ok", "error": null, "data": { "iBonds": { "currentRate": 5.27, "fixedRate": 1.3, "inflationRate": 1.97, "purchaseLimit": 10000 }, "eeBonds": { "currentRate": 2.7, "guaranteedDoubling": "20 years (guaranteed to double in value)", "purchaseLimit": 10000 }, "recommendation": "I Bonds", "recommendationReason": "I Bonds currently offer 5.27% vs EE Bonds at 2.70%", "nextRateChange": "2024-05-01", "lastUpdated": "2024-02-01T00:00:00.000Z" } }
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Frequently Asked Questions
Get answers to common questions about the I-Bond Rates API
Who built the I-Bond Rates API?
The I-Bond Rates API is built and maintained by APIVerve. All 300+ APIs on our platform are developed in-house by the APIVerve team, ensuring consistent quality, unified authentication, predictable pricing, and enterprise-grade reliability backed by our 99.9% uptime SLA. We handle the infrastructure, maintenance, and updates so you can focus on building your application.
What does the I-Bond Rates API do?
I-Bond Rates provides current and historical interest rates for US Series I Savings Bonds. I-Bonds are inflation-protected savings bonds with a composite rate made up of a fixed rate plus an inflation rate that adjusts every 6 months. The API returns structured data in JSON, XML, or YAML format, making it easy to integrate into any application or workflow.
How fast is the I-Bond Rates API?
The I-Bond Rates API has an average response time of 500ms, with a median (p50) of 467ms and 99th percentile of 720ms. Our infrastructure maintains 99.9% uptime with servers distributed globally for low latency.
How much does the I-Bond Rates API cost?
Each call to the I-Bond Rates API uses 1 credit. The free tier includes 100 credits per month. Paid plans start at $29.99/month with higher limits, and enterprise plans offer custom pricing with priority support.
How do I authenticate I-Bond Rates API requests?
Include your API key in the request header as X-API-Key: your_key_here. All requests are made over HTTPS for security. You can get your API key by signing up for a free account.
What HTTP methods does I-Bond Rates support?
The I-Bond Rates API supports GET requests. Simply pass your parameters as query strings in the URL. Check our documentation for detailed parameter specifications.
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