An API can check relationships between SEC financial-statement figures, but “adds up” is meaningful only when the rules are explicit. The SEC makes EDGAR data available through public APIs and downloadable datasets; its published data is “as filed,” not independently certified as error-free. The available SEC documentation does not establish what this particular API tests, how it handles filing variations, or how accurate it is. Those details need to come from the tool’s author.
What SEC financial data is available to an API
The SEC says its data.sec.gov APIs provide public access to EDGAR information, including entity and submission details and XBRL data from financial statements. Its September 8, 2021 announcement described the APIs as returning JSON and said a bulk ZIP of API data was updated nightly. Because that announcement is dated, check the current SEC API documentation for endpoint details, access requirements, and refresh behavior before building against it.
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The SEC also publishes financial statement datasets containing submission information, numeric facts presented on primary statements, tag definitions, and statement presentation data. The documented scope includes primary financial statements and footnotes. The SEC’s Financial Statement Data Sets Readme cautions that submissions can include redundancies, inconsistencies, and discrepancies compared with other publication formats. It states: “All numeric data is ‘as filed.’” That describes the source values; it is not a guarantee that they are correct or internally consistent.
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A checker’s result depends on the exact relationships its code evaluates. It might test arithmetic within a statement, compare figures across statements, or apply another defined rule—but the SEC’s API and dataset documentation does not show which, if any, this API implements. The author should specify each tested relationship rather than treating “checks financial data” as a self-explanatory accuracy claim.
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For a reader evaluating the API, useful implementation details include:
- Which SEC endpoint or dataset it consumes, and which entities, forms, periods, and amendments it supports.
- How it treats custom XBRL tags, units, signs, dimensions or segments, and duration facts versus point-in-time facts.
- How it selects among duplicate submissions, amended filings, and restated figures.
- What a flagged result means, how the tool explains it, and what conditions can produce false positives or false negatives.
These details matter because SEC filings contain structured facts with tags, units, segments, and different reporting periods. The SEC documentation describes those data features, but it does not document this API’s handling of them.
Rank #2
A consistency check is not an audit
There are distinct stages in working with filing data: retrieving it, checking its structure, testing specified arithmetic or other relationships, and establishing whether the reported financial statements are materially correct. Success at one stage does not establish success at the next. A custom API may help identify a defined inconsistency; without evidence about its rules and validation, its output cannot establish a company’s financial condition or provide audit assurance.
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The SEC’s interactive-data guide describes XBRL as machine-processable data that supplements traditional filing formats, and notes that viewers are used to render it for people. It also says companies are not required to obtain assurance on interactive data. The guide is dated and is background, not a substitute for current rules or legal advice.
Rank #3
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How EDGAR filing validation differs
EDGAR applies its own filing-validation process, and the consequences described by the SEC depend on an error’s type and location. The SEC’s EDGAR filing FAQ says some XBRL errors in exhibits may lead to those exhibits being stripped before acceptance, while an XBRL error in an Inline XBRL primary document can suspend the whole submission. Less severe warnings may remain in a filing.
That is filing-processing context, not proof that a separate API duplicates EDGAR’s validator, rules, or outcomes. A tool that checks selected numerical relationships answers a different question unless its author demonstrates otherwise.
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What would substantiate the API’s claim
To make “checks whether SEC financial data adds up” a useful and verifiable claim, the API should show its inputs, rules, and results on reproducible examples. A meaningful validation record would identify the filing and facts involved, state the expected relationship, show the result, and disclose known limitations—including cases where the tool flags a valid filing or misses an inconsistency.
Without such examples and test evidence, readers can confirm that SEC data is available to build on, but cannot infer the API’s coverage or accuracy from the title alone. The SEC sources document the underlying data and filing context; they do not document this particular implementation.
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