# US Treasury Interest Rate Tracker (`m_ctim/us-treasury-interest-rate-tracker`) Actor

Track the average monthly interest rate the US Treasury pays across a security category (Treasury Bills, Notes, Bonds, TIPS, and more), with year-over-year comparison, via the official US Treasury Fiscal Data API.

- **URL**: https://apify.com/m\_ctim/us-treasury-interest-rate-tracker.md
- **Developed by:** [Timothy Kelvin](https://apify.com/m_ctim) (community)
- **Categories:** Business
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

Pay per usage

This Actor is paid per platform usage. The Actor is free to use, and you only pay for the Apify platform usage, which gets cheaper the higher subscription plan you have.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-usage

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## US Treasury Interest Rate Tracker

Track the average monthly interest rate the US Treasury pays across a
security category — Treasury Bills, Notes, Bonds, TIPS, Floating Rate
Notes, and more — with a year-over-year comparison, via the official
[US Treasury Fiscal Data
API](https://fiscaldata.treasury.gov/datasets/average-interest-rates-treasury-securities/average-interest-rates-on-u-s-treasury-securities).

Built for finance and macro research teams tracking the government's
own cost of borrowing without pulling Treasury's own CSV exports.

Note: this is the Treasury's **average rate paid across its
outstanding/issued securities by category**, not the daily market par
yield curve you'd see quoted for a specific maturity (e.g. "the
10-year yield") — a related but distinct metric, published monthly
rather than daily.

### Input

```json
{
  "securityKeyword": "Treasury Bills",
  "monthsBack": 12,
  "maxResults": 50
}
```

| Field | Type | Description |
|---|---|---|
| `securityKeyword` | string | Case-insensitive match against the security description, e.g. `"Treasury Bills"`, `"Treasury Notes"`, `"Treasury Bonds"`, `"TIPS"`, `"Total Interest-bearing Debt"`. Leave blank to return all categories. Default `"Treasury Bills"`. |
| `monthsBack` | number | How many months of history to fetch, by record date. Data is published monthly. Default `12`, max `60`. |
| `maxResults` | number | Maximum number of monthly records to return, most recent first. Default `50`, max `200`. |

### Output

One record per security category per month:

```json
{
  "date": "2026-07-31",
  "securityType": "Marketable",
  "securityDescription": "Treasury Bills",
  "avgInterestRatePercent": 3.758,
  "yearOverYearChangePercentagePoints": -0.612
}
```

### How it works

Direct calls to the official [Treasury Fiscal Data
API](https://fiscaldata.treasury.gov/) (`api.fiscaldata.treasury.gov`)
— no proxy, no key, no scraping. Same platform and mechanism as this
portfolio's [US National Debt
Tracker](https://github.com/timmKal01/us-national-debt-tracker),
applied to a different dataset.

### Pricing note

Billed per **search** (one run), not per record returned.

### Related products

- [US National Debt Tracker](https://github.com/timmKal01/us-national-debt-tracker) — daily national debt from the same Treasury Fiscal Data platform
- [US Labor Market Indicator Lookup](https://github.com/timmKal01/us-labor-market-indicator-lookup) — national labor market data from the same US-macro-data family

# Actor input Schema

## `securityKeyword` (type: `string`):

Case-insensitive match against the security description, e.g. "Treasury Bills", "Treasury Notes", "Treasury Bonds", "TIPS", "Total Interest-bearing Debt". Leave blank to return all security categories.

## `monthsBack` (type: `integer`):

How many months of history to fetch, by record date. Data is published monthly.

## `maxResults` (type: `integer`):

Maximum number of monthly records to return, most recent first.

## Actor input object example

```json
{
  "securityKeyword": "Treasury Bills",
  "monthsBack": 12,
  "maxResults": 50
}
```

# Actor output Schema

## `results` (type: `string`):

No description

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "securityKeyword": "Treasury Bills"
};

// Run the Actor and wait for it to finish
const run = await client.actor("m_ctim/us-treasury-interest-rate-tracker").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = { "securityKeyword": "Treasury Bills" }

# Run the Actor and wait for it to finish
run = client.actor("m_ctim/us-treasury-interest-rate-tracker").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "securityKeyword": "Treasury Bills"
}' |
apify call m_ctim/us-treasury-interest-rate-tracker --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,m_ctim/us-treasury-interest-rate-tracker"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/RIVNZ99oZXqM1pR78/builds/ce3XsiEpN810U9dRg/openapi.json