Welcome to DebtStack

Corporate structure and debt analysis is complex. Even with AI, achieving accuracy, speed, and cost-effectiveness requires significant engineering. DebtStack does this hard work once, giving you instant API access to pre-computed, quality-assured credit data.

The Problem

Extracting accurate corporate structure and debt data from SEC filings is surprisingly hard:

Accuracy challenges: LLMs return malformed JSON, misinterpret amounts, confuse entity names
Speed variability: A single extraction can take 90-300 seconds with multiple LLM calls
Cost uncertainty: Ad-hoc extraction costs $0.03-0.50+ per company
Expertise required: Understanding 10-K structure, Exhibit 21, debt footnotes, VIEs

The Solution: DebtStack runs extraction once with rigorous QA, then serves pre-computed data via fast API.

Current Database

314 companies covering S&P 100, NASDAQ 100, and broader S&P 500, with thousands of debt instruments, credit ratings, CDS spreads, real-time bond pricing, and searchable SEC filing sections. Expanding to 500+ companies.

Structured Data

314 companies with debt instruments, credit ratings, covenants, guarantees, collateral, and keyword/semantic/hybrid search across indentures, credit agreements, and SEC filings

AI-Optimized

Field selection, powerful filters, and consistent JSON responses designed for LLM consumption

Real-Time Pricing

Bond pricing from FINRA TRACE with yield-to-maturity and spread calculations

Credit Ratings & Spreads

S&P, Moody’s, Fitch ratings + CDS spread time series across 250+ companies

Document Search

Full-text search across thousands of SEC filing sections including indentures and credit agreements

Coverage

S&P 100, NASDAQ 100, and broader S&P 500 companies across all sectors:

Sector	Sample Companies
Tech	AAPL, MSFT, NVDA, GOOGL, META, AMZN, TSLA, ORCL, AVGO
Financials	JPM, GS, BAC, WFC, MS
Healthcare	JNJ, UNH, LLY, ABBV, MRK, IDXX, DXCM
Consumer	WMT, COST, HD, MCD, KO, PEP, ORLY
Telecom/Cable	CHTR, ATUS, TMUS, LUMN
Energy	XOM, CVX, OXY
Offshore Drilling	RIG, VAL, DO, NE
Airlines	AAL, UAL, DAL
Semiconductors	NVDA, AMD, AVGO, GFS, CDNS

Quick Example

Find the highest-leverage company among the MAG7:

import requests

response = requests.get(
    "https://api.debtstack.ai/v1/companies",
    params={
        "ticker": "AAPL,MSFT,GOOGL,AMZN,NVDA,META,TSLA",
        "fields": "ticker,name,net_leverage_ratio",
        "sort": "-net_leverage_ratio",
        "limit": 1
    },
    headers={"X-API-Key": "ds_xxxxx"}
)

print(response.json())
# {"data": [{"ticker": "TSLA", "name": "Tesla, Inc.", "net_leverage_ratio": 1.8}]}

14 Core Primitives

DebtStack offers 14 atomic API endpoints optimized for AI agents:

Primitive	Endpoint	Cost	Purpose
Search Companies	`GET /v1/companies`	$0.05	Filter by leverage, sector, 15+ filters
Search Bonds	`GET /v1/bonds`	$0.05	Find by yield, seniority, maturity
Resolve Bond	`GET /v1/bonds/resolve`	$0.05	Map CUSIP/ISIN or free-text to bond
Financials	`GET /v1/financials`	$0.05	Quarterly income, balance, cash flow
Collateral	`GET /v1/collateral`	$0.05	Collateral securing debt
Covenants	`GET /v1/covenants`	$0.05	Search structured covenant data
Ratings	`GET /v1/ratings`	$0.05	Credit rating history (S&P, Moody’s, Fitch)
CDS Spreads	`GET /v1/market/cds`	$0.05	CDS spread time series
Compare Covenants	`GET /v1/covenants/compare`	Business	Compare covenants across companies
Company Changes	`GET /v1/companies/{ticker}/changes`	$0.10	Track debt structure changes
Traverse Entities	`POST /v1/entities/traverse`	$0.15	Follow guarantor chains
Search Documents	`GET /v1/documents/search`	$0.15	Search SEC filings (keyword, semantic, hybrid)
Batch	`POST /v1/batch`	Sum	Execute multiple operations
Request Coverage	`POST /v1/coverage/request`	Free	Request coverage for non-covered companies

Data Quality

Estimated data is always flagged. When data cannot be extracted and must be inferred:

issue_date_estimated: true - Issue date inferred from maturity date
Future estimated fields follow the same pattern

Data Freshness

DebtStack extracts directly from the latest SEC EDGAR filings, providing 12-18 months fresher data than LLMs like ChatGPT or Gemini.

Source	Data Period	NVDA EBITDA Example
DebtStack	Nov 2025 (FY2026 Q3)	$121B
Gemini/ChatGPT	Q1 2025 (knowledge cutoff)	$39B

Integrations

LangChain

Use DebtStack as a tool in your LangChain agents

MCP

Model Context Protocol integration for Claude

REST API

Direct API access with any HTTP client

Getting Started

Create an account

Make your first request

Try the quickstart guide to query company data

Explore the API

Browse the full API reference for all endpoints

Ready to start? Check out the Quickstart Guide.

Get Started

Core Concepts

Guides

Introduction

Welcome to DebtStack

The Problem

Current Database

Structured Data

AI-Optimized

Real-Time Pricing

Credit Ratings & Spreads

Document Search

Coverage

Quick Example

14 Core Primitives

Data Quality

Data Freshness

Integrations

LangChain

MCP

REST API

Getting Started

​Welcome to DebtStack

​The Problem

​Current Database

Structured Data

AI-Optimized

Real-Time Pricing

Credit Ratings & Spreads

Document Search

​Coverage

​Quick Example

​14 Core Primitives

​Data Quality

​Data Freshness

​Integrations

LangChain

MCP

REST API

​Getting Started

Welcome to DebtStack

The Problem

Current Database

Coverage

Quick Example

14 Core Primitives

Data Quality

Data Freshness

Integrations

Getting Started