# SEC 10-K Section Year-over-Year Change Comparator

> SEC 10-K Section Year-over-Year Change Comparator is a paid API for AI agents from x402-agent-api.onrender.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-10).

Compares a specific section of a company's 10-K annual filing (e.g. Risk Factors, MD&A) between two years, returning added, removed, and edited paragraphs with word-level diffs and a summary.

## Facts

- Endpoint: POST https://x402-agent-api.onrender.com/api/v1/sec-section-changes?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sec-10-k-section-year-over-year-change-comparator-f4fdba5b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TZ5VRJxS5rsPRiQbqUEEC

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sec-10-k-section-year-over-year-change-comparator-f4fdba5b -d '<json body>'
```

Example prompt: What changed in Tesla's risk factors section between their 2024 and 2025 10-K filings? Show me what was added, removed, and edited, with a word-level diff.

## When to prefer this

Choose this endpoint when you need to understand what specifically changed in a 10-K section between years — not just read the current text. It is the right tool for regulatory change monitoring, investment research on evolving risk disclosures, compliance tracking, or due diligence workflows where the delta matters. Prefer it over a plain section-reader when the user asks 'what changed', 'what was added', 'what was removed', or 'how did X evolve'. Supports any major 10-K section and any year since 2001.

## Known failure modes

- Section not present in the filing — not charged, returns indication of missing section
- Company not found by ticker/name — may return list of matching tickers for free
- Fiscal year out of range (before 2001 or future) — validation error
- Invalid ticker format or CIK — schema validation error
- Filing not yet available on SEC EDGAR — no data returned
- Network/rendering timeout from SEC EDGAR — upstream error

## How this service works

Answers 'What changed in Tesla's risk factors this year?' or 'Which new risks did Apple add?'. Compares a section of a company's 10-K (Risk Factors, MD&A, Business, Legal, Market Risk, Cybersecurity) with an earlier year's from SEC EDGAR: added, removed and edited paragraphs with a word-level diff, plus a summary. Latest vs previous year by default, or any years since 2001. By ticker, CIK or name. Not charged if a section is missing. $0.04 USDC per call.

## Output

Returns structured JSON with: lists of added, removed, and changed paragraphs (with inline word-level diffs showing insertions and deletions), a summary with counts of added/changed/removed/unchanged paragraphs and percent unchanged, metadata for both the current and previous 10-K filings (ticker, CIK, company name, fiscal year, accession number, filing date, filing URL, word count), and optional next-call suggestions for reading the full section.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "cik": {
   "anyOf": [
    {
     "type": "string",
     "pattern": "^\\d{1,10}$"
    },
    {
     "type": "integer",
     "maximum": 9007199254740991,
     "exclusiveMinimum": 0
    }
   ],
   "description": "SEC Central Index Key, e.g. 320193. Use this, `ticker` or `company`."
  },
  "ticker": {
   "type": "string",
   "pattern": "^[A-Z][A-Z0-9.\\-]{0,9}$",
   "description": "US stock ticker, e.g. AAPL, MSFT, BRK-B. Use this, `cik` or `company`."
  },
  "company": {
   "type": "string",
   "maxLength": 120,
   "minLength": 2,
   "description": "Company name, e.g. \"Apple\" or \"Coca-Cola\". Use this, `ticker` or `cik`; a name matching several companies returns their tickers, free."
  },
  "section": {
   "enum": [
    "business",
    "risk_factors",
    "cybersecurity",
    "legal_proceedings",
    "mda",
    "market_risk"
   ],
   "type": "string",
   "description": "Which 10-K section to compare: risk_factors, mda, business, legal_proceedings, market_risk or cybersecurity."
  },
  "fiscal_year": {
   "type": "integer",
   "maximum": 2100,
   "minimum": 2001,
   "description": "The newer report: the 10-K whose fiscal year ends in this year. Default: the latest 10-K."
  },
  "accession_number": {
   "type": "string",
   "pattern": "^\\d{10}-\\d{2}-\\d{6}$",
   "description": "The newer report as an exact 10-K filing, instead of `fiscal_year`."
  },
  "compare_to_fiscal_year": {
   "type": "integer",
   "maximum": 2100,
   "minimum": 2001,
   "description": "The older report to compare against: the 10-K for this fiscal year. Default: the 10-K just before the newer one."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "cik": "1318605",
  "item": "1A",
  "added": [
   "Growth of our business is also dependent upon our ability to develop and commercialize Bots, including Optimus, which is in a nascent industry that has yet to develop commercially."
  ],
  "source": "sec-edgar",
  "ticker": "TSLA",
  "changed": [
   {
    "diff": "We may experience {+issues or+} delays in {+developing,+} launching and ramping the production of our [-products-] {+products, services+} and features, or we may be unable to control our manufacturing costs.",
    "after": "We may experience issues or delays in developing, launching and ramping the production of our products, services and features, or we may be unable to control our manufacturing costs.",
    "similarity": 0.93
   }
  ],
  "company": "Tesla, Inc.",
  "current": {
   "form": "10-K",
   "filing_url": "https://www.sec.gov/Archives/edgar/data/1318605/000162828026003952/tsla-20251231.htm",
   "word_count": 12590,
   "filing_date": "2026-01-29",
   "fiscal_year": 2025,
   "accession_number": "0001628280-26-003952",
   "period_of_report": "2025-12-31"
  },
  "removed": [
   "We must manage ongoing obligations under our agreement with the Research Foundation for the State University of New York relating to our Gigafactory New York."
  ],
  "section": "risk_factors",
  "summary": {
   "paragraphs_added": 12,
   "percent_unchanged": 30.9,
   "paragraphs_changed": 50,
   "paragraphs_removed": 10,
   "paragraphs_unchanged": 69
  },
  "previous": {
   "form": "10-K",
   "filing_url": "https://www.sec.gov/Archives/edgar/data/1318605/000162828025003063/tsla-20241231.htm",
   "word_count": 12062,
   "filing_date": "2025-01-30",
   "fiscal_year": 2024,
   "accession_number": "0001628280-25-003063",
   "period_of_report": "2024-12-31"
  },
  "truncated": false,
  "next_calls": [
   {
    "why": "Read the newer section in full.",
    "tool": "sec_filing_section",
    "price": "$0.01",
    "arguments": {
     "ticker": "TSLA",
     "section": "risk_factors",
     "accession_number": "0001628280-26-003952"
    }
   }
  ],
  "section_title": "Risk Factors"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sec-10-k-section-year-over-year-change-comparator-f4fdba5b/health.json
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