Top Financial Services APIs in 2025

Exploring the Top 10 Financial APIs for Developers

1. SEC Filings API

SEC Filings API provides access to regulatory documents that companies must submit to the Securities and Exchange Commission (SEC). This API is essential for developers looking to retrieve SEC filings based on stock codes or Central Index Key (CIK).

Key Features:

• Get SEC Filing: This feature returns a list of SEC filings for the requested company. The response includes fields like name, accessionNumber, filingDate, period, and formType. Developers can use this data to display recent filings and help users make informed investment decisions.

{
    "meta": {
        "copyright": "Copyright 2022 Last10K.com All Rights Reserved",
        "terms": ["https://dev.last10k.com/terms", "https://www.sec.gov/privacy.htm#security"]
    },
    "data": {
        "attributes": {
            "status": 0,
            "company": {
                "name": "AMAZON COM INC",
                "cik": "1018724",
                "ticker": "amzn"
            },
            "count": 346,
            "result": [
                {
                    "name": "Quarterly Report",
                    "accessionNumber": "0001018724-22-000019",
                    "filingDate": "2022-07-29T00:00:00",
                    "period": "2022-06-30T00:00:00",
                    "formType": "10-Q",
                    "url": "https://www.sec.gov/Archives/edgar/data/1018724/000101872422000019/amzn-20220630.htm"
                }
            ]
        }
    }
}
    

• Get Balance Sheet: This feature returns a company's most recent balance sheet, summarizing their liabilities, assets, and shareholders' equity. The response includes fields like CashAndCashEquivalentsAtCarryingValue, Assets, and Liabilities. Developers can utilize this data to provide users with insights into a company's financial position.

{
    "meta": {
        "copyright": "Copyright 2022 Last10K.com All Rights Reserved",
        "terms": ["https://dev.last10k.com/terms", "https://www.sec.gov/privacy.htm#security"]
    },
    "data": {
        "attributes": {
            "status": 0,
            "company": {
                "name": "Meta Platforms, Inc.",
                "cik": "1326801",
                "ticker": "fb"
            },
            "filing": {
                "name": "Consolidated Balance Sheets",
                "accessionNumber": "0001326801-22-000018",
                "filingDate": "2022-02-03T00:00:00",
                "period": "2021-12-31T00:00:00",
                "formType": "10-K",
                "filingCount": 10
            },
            "result": {
                "CashAndCashEquivalentsAtCarryingValue": 16601000000.0,
                "Assets": 165987000000.0,
                "Liabilities": 41108000000.0,
                "StockholdersEquity": 124879000000.0
            }
        }
    }
}
    

2. Financial Sentiment Analysis API

Financial Sentiment Analysis API utilizes language processing techniques to analyze the sentiment of financial-related text. This API is particularly useful for financial websites that want to categorize content based on sentiment.

Key Features:

• Sentiment Analysis: To use this feature, users must input a text string. The response includes fields such as type (sentiment category), score (numerical sentiment score), ratio (sentiment ratio), and keywords (list of significant words with their scores). Developers can use this data to categorize financial content and identify trends in sentiment over time.

{
    "type": "positive",
    "score": 0.917220858,
    "ratio": 1,
    "keywords": [
        {
            "word": "love",
            "score": 0.917220858
        }
    ],
    "version": "7.5.7",
    "author": "twinword inc.",
    "email": "[email protected]",
    "result_code": "200",
    "result_msg": "Success"
}
    

3. Interests Calculator API

Interests Calculator API allows developers to incorporate compound interest calculations into their applications effortlessly. This API simplifies the complex mathematics involved in calculating compound interest, making it accessible for financial planning applications.

Key Features:

• Get Interests: To use this feature, users must enter the initial investment, annual contribution, duration, and interest rate. The response includes fields like apy (annual percentage yield), compound_interest, investment_returns, and principal. Developers can use this data to help users forecast their savings and investment goals over time.

{
    "apy": "5.61%",
    "compound_interest": "€258.49",
    "investment_returns": "€4862.55",
    "principal": "$5000",
    "rate": "5.50%",
    "time_months": "12 M",
    "time_years": "1.00 Y"
}
    

4. Foreign Exchange API

Foreign Exchange API provides developers with access to real-time foreign exchange data and services. This API is essential for applications that require accurate currency conversion and exchange rate information.

Key Features:

• Get Conversion: To use this feature, users must specify the currencies they want to convert and the amount. The response includes fields such as success (indicating the request status), result (containing conversion details), and date (the conversion date). Developers can use this data to facilitate multi-currency transactions in their applications.

{
    "success": true,
    "result": {
        "date": "2023-05-04T19:48:02.114Z",
        "from": {
            "currency": "EUR",
            "amount": 20
        },
        "to": {
            "currency": "USD",
            "amount": 22.148
        }
    }
}
    

5. The Current Interest Rates API

Current Interest Rates API enables developers and financial professionals to access real-time interest rate information from central banks and benchmarks worldwide. This API is invaluable for making informed financial decisions and performing market analysis.

Key Features:

• Get Interest Rate: To use this feature, users simply run the endpoint to obtain interest rate information. The response includes fields such as central_bank (name of the bank), country (associated country), rate_pct (current interest rate), and last_updated (timestamp of the last update). Developers can use this data to track changes in interest rates over time.

{
    "central_bank_rates": [
        {
            "central_bank": "Australian Central Bank",
            "country": "Australia",
            "rate_pct": 4.35,
            "last_updated": "11-08-2023"
        }
    ]
}
    

6. Forex API

Forex API provides real-time exchange rates for over 190 currencies. This API is designed for applications that require accurate currency conversions and exchange rate information.

Key Features:

• Get Latest Rates: To use this feature, users simply run the endpoint to receive USD-based rates updated every 10 minutes. The response includes fields such as bs (base currency), ts (timestamp), and rt (exchange rates). Developers can use this data to display current exchange rates in their applications.

{
    "bs": "USD",
    "ts": 1692112793,
    "rt": {
        "EUR": 0.9146957767426027,
        "JPY": 145.33945833333334,
        "GBP": 0.7844559933265874
    }
}
    

7. Banks Interest Rate API

Banks Interest Rate API provides access to global central bank interest rates and key financial benchmarks. This API is essential for users looking to make informed decisions in the financial landscape.

Key Features:

• Get Interest: To use this feature, users run the endpoint to receive information about central bank interest rates and benchmarks. The response includes fields such as central_bank, country, rate_pct, and last_updated. Developers can use this data to monitor interest rate changes and make informed financial decisions.

{
    "central_bank_rates": [
        {
            "central_bank": "British Central Bank",
            "country": "United Kingdom",
            "rate_pct": 5.25,
            "last_updated": "08-03-2023"
        }
    ]
}
    

8. Mortgage Calculator API

Mortgage Calculator API simplifies the complexities of home financing by providing detailed mortgage insights. This API is designed to help users understand their financial commitments when purchasing a home.

Key Features:

• Calculate: This feature allows users to receive calculated interests over their mortgage. The response includes fields such as monthly_payment, annual_payment, and total_interest_paid. Developers can use this data to help users assess their financial commitments and make informed decisions regarding home purchases.

{
    "monthly_payment": {
        "total": 1001,
        "mortgage": 1001,
        "property_tax": 0,
        "hoa": 0.0,
        "annual_home_ins": 0
    },
    "annual_payment": {
        "total": 12015,
        "mortgage": 12015,
        "property_tax": 0.0,
        "hoa": 0.0,
        "home_insurance": 0.0
    },
    "total_interest_paid": 100374
}
    

9. Instant Forex Rates API

Instant Forex Rates API provides exchange rate data that is crucial for smooth financial transactions and accurate currency conversions. This API is designed for applications that require real-time foreign exchange rates.

Key Features:

• Available Currencies: To use this feature, users run the endpoint to get a list of all available currencies. The response includes fields such as symbol and name. Developers can use this data to inform users about the currencies supported by the API.

[
    {"symbol": "USD", "name": "United States Dollar"},
    {"symbol": "EUR", "name": "Euro Member Countries"},
    {"symbol": "JPY", "name": "Japan Yen"}
]
    

• Conversion Currencies: To use this feature, users must indicate two currencies and an amount in the parameters. The response includes fields such as success, from, to, and convertedAmount. Developers can use this data to facilitate currency conversions in their applications.

{
    "success": true,
    "result": {
        "from": "USD",
        "to": "EUR",
        "amountToConvert": 10,
        "convertedAmount": 9.068150000000001
    }
}
    

10. Global Interest Rates API

Global Interest Rates API provides access to interest rates from central banks and financial benchmarks worldwide. This API is essential for users looking to navigate the financial landscape and make informed decisions.

Key Features:

• Interest Rate: To use this feature, users must indicate the name of a country to obtain its central banks or the name of non-central banks in the parameter. The response includes fields such as central_bank, country, rate_pct, and last_updated. Developers can use this data to monitor interest rate changes and make informed financial decisions.

{
    "central_bank_rates": [
        {
            "central_bank": "New Zealand Central Bank",
            "country": "New Zealand",
            "rate_pct": 5.5,
            "last_updated": "05-24-2023"
        }
    ]
}
    

Conclusion