I-Bond Rates API GET

https://api.apiverve.com/v1/savingsbonds

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.

Try it — live request, no key required

Request

GETapi.apiverve.com/v1/savingsbonds

Verification

Format

No key required to try it. Get a key to use it in your app.

200 OK

{
  "status": "ok",
  "error": null,
  "data": {
    // I-Bond Rates response payload
  }
}

Code examples — ready to paste, with real parameters

curl "https://api.apiverve.com/v1/savingsbonds?period=2024-11" \
  -H "x-api-key: YOUR_API_KEY"

Replace YOUR_API_KEY with your key.Full reference in the docs →

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Access methods

Call it however you build.

One endpoint, many ways in — REST with JSON, XML, YAML, and CSV, plus GraphQL and an MCP interface for AI agents.

JSON

Default REST response

XML

Markup format

YAML

Human-readable

CSV

Tabular export

Beta

GraphQL

Query language

New

MCP

For AI agents

View all integrations →

Zero-code embed

Drop it into any site.

Add an interactive form for I-Bond Rates with a single snippet — no backend, no keys in your markup.

Live preview Demo

LayoutTheme

Loading preview…

Get embed code →Read the docs

Other ways to use I-Bond Rates

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Use it in Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.on VerveContext

Questions.

Common questions about the I-Bond Rates API.

Read the docs →

What does the I-Bond Rates API do?

How do I authenticate I-Bond Rates API requests?

Pass your API key in the x-api-key header over HTTPS. One key works across all 300+ APIVerve APIs — there are no per-endpoint credentials.

How much does the I-Bond Rates API cost?

Each call spends 1 credit from your shared pool. The free tier includes 100 credits every month, and paid plans add more headroom.

How fast is the I-Bond Rates API?

Typical responses return in around 467 ms (p50), served from 24 regions under a 99.9% uptime SLA.

What response formats does the I-Bond Rates API support?

JSON by default, plus XML and YAML via the format parameter. GraphQL and an MCP interface for AI agents are available across the catalog.

What HTTP method does the I-Bond Rates API use?

GET over HTTPS, following standard REST conventions with a consistent { status, error, data } response envelope.