SEC EDGAR

sec-mcp

A Model Context Protocol server that gives Claude Desktop access to SEC EDGAR data — company filings, financial statements, and company info. No API key needed. It runs as a single native binary, with no Node, Python or Docker runtime behind it.

Why an MCP for this?

EDGAR is a set of public REST endpoints with no API key, and the documentation at sec.gov/search-filings/edgar-application-programming-interfaces is reasonable. So strictly speaking, an MCP isn't needed. What this wrapper buys you:

1. Persistent User-Agent identity. SEC's fair-access policy requires a contact email in the User-Agent header; without one, requests get throttled or rejected. You don't want to re-paste your email into every prompt. The MCP stores it in a config file and stamps every request.

2. Ticker → CIK resolution with caching. Every EDGAR endpoint is keyed by a zero-padded 10-digit CIK, not by ticker. Without a tool, each query would re-fetch the ~1 MB company_tickers.json and parse it from scratch. The MCP caches it for an hour.

3. URL-construction quirks the docs are quiet about. The CY{period} prefix on the XBRL frames endpoint, the trailing I for instant concepts, the zero-padded CIK, the dash-stripped accession number in archive URLs. Easy to get wrong on the fly; encoded once in the tool.

4. Response shaping. companyfacts responses are tens of MB and filings.recent is laid out as column-major parallel arrays. Both are usable, but a language model would burn a lot of context reformatting them. The MCP returns trimmed, row-shaped JSON.

5. Discovery. With the MCP installed, the tool list itself tells Claude that it can query SEC filings, plus the common concept names. Without it, the model has to remember the endpoints exist.

If you only pull one or two filings a year, you don't need this — just give Claude the URL. At any higher volume, the wrapper pays for itself by turning "explain the URL grammar in every conversation" into "ask a natural question."

Install

Install with Cargo (Rust 1.88 or newer):

cargo install sec-mcp

This compiles the rustls crypto backend (ring), which has a small amount of C, so you need a C compiler on the build host — but no cmake or assembler. macOS (Xcode Command Line Tools) and most desktop Linux distros already have one; a minimal Linux image may not — install it first, e.g. apt install build-essential on Debian/Ubuntu.

Configure Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "sec-edgar": {
      "command": "sec-mcp",
      "args": []
    }
  }
}

Restart Claude Desktop.

First use

On your first SEC-related request Claude will explain that a contact email is required by the SEC EDGAR fair-access policy and ask your permission before proceeding. Your email is stored locally in ~/Library/Application Support/sec-mcp/config.toml and is only used in the HTTP User-Agent header sent to the SEC — it is not shared anywhere else.

Example prompts

• "What are Apple's recent SEC filings?"
• "Show me Tesla's annual revenue for the last 5 years"
• "What was Microsoft's net income last quarter?"
• "What industry is NVDA in according to the SEC?"
• "What is Bridgewater Associates' CIK, and what has it filed recently?"
• "Who owns more than 5% of Sonos, and has any of them filed a 13D?"
• "How much did SpaceX raise in private rounds before it listed?"
• "What were Bridgewater's ten largest positions last quarter?"
• "Which 8-Ks were filed in the last hour, and what items did they report?"
• "List every Schedule 13D filed last week"
• "Show me Amazon's most recent 10-K filing"
• "What tickers are listed on NYSE with 'energy' in the name?"
• "What financial metrics does Apple report to the SEC?"
• "What revenue guidance did Airbnb give in its Q1 2025 earnings release?"
• "Summarize the risk factors in Tesla's latest 10-K"
• "Which companies had the highest revenue in 2024?"

Available tools

Tool	Description
sec_configure	First-run setup — saves your contact email
sec_lookup_cik	Resolve a ticker to its SEC CIK number, or search every EDGAR filer by name: fund managers, private issuers and individuals with no ticker included
sec_company_info	SIC code, industry, state of incorporation, fiscal year end, addresses
sec_recent_filings	Recent filings (10-K, 10-Q, 8-K, etc.) with direct URLs — pages into older history automatically when a form-type filter needs it. With no ticker, the latest filings across all of EDGAR in real time, by form, with each filing's parties and an 8-K's items
sec_filing_text	The text of a filing document or exhibit (10-K, 10-Q, 8-K, earnings release EX-99.1, proxy): its section index, any section by item, a search within it, or pages from any point. Given a filing, lists its documents by type
sec_full_text_search	Search the body text of filings since 2001, exhibits included — the only tool here that finds companies by what they said, rather than needing the company up front. Filter by form, ticker and date (amendments excluded unless asked for); every hit carries a direct document URL. With no query, lists filings by form and date instead, for any period since 2001
sec_insider_transactions	Forms 3, 4 and 5 — who bought or sold, when, how many shares and at what price, with transaction codes in plain language and footnotes resolved. Also Form 144, an insider's notice of a proposed sale, with any 10b5-1 plan date
sec_institutional_holdings	Form 13F — what an institutional manager (Berkshire, Bridgewater, BlackRock) holds each quarter, as positions with value, share of portfolio and voting authority, filterable by issuer. Issuers are named as filed, since 13F has no tickers
sec_private_offerings	Form D — money raised without a registered offering by private companies, funds and public companies: amount offered and sold, investors, the exemption claimed, brokers paid, and the officers, directors and promoters named
sec_beneficial_ownership	Schedules 13D and 13G — who owns more than 5% of a company, with voting and dispositive power, percent of class and, for a 13D, the holder's stated purpose. Given a holder's CIK, what that holder owns above 5%
sec_financial_concept	Historical financial data from XBRL (revenue, net income, EPS, assets…) — latest 20 facts by default, paging back into older history
sec_list_tickers	Search/list all SEC-registered tickers with exchange info — 50 per page, with paging
sec_company_facts	Discover all XBRL concepts (metrics) a company reports
sec_xbrl_frames	Cross-company comparison of a financial metric for a given period

Wherever a tool takes a ticker, it also takes a CIK (1163302, 0001163302 or CIK0001163302). SEC's ticker list holds only current tickers, so a company that was acquired, delisted or renamed is reachable only by CIK. sec_lookup_cik with name finds it, and full-text search hits and frames rows carry one.

Amendments (10-K/A and friends)

A form ending in /A amends one filed earlier. A 10-K/A is often not a complete annual report. Rule 12b-15 requires only the full text of each item being changed, so the most common amendment is Part III alone (directors, pay, ownership), filed when the proxy statement misses its 120-day window. Others add or fix exhibits. The rest are restatements that replace the original's figures. Apple's January 2010 10-K/A, for example, refiled fiscal 2009 under new revenue-recognition rules.

sec-mcp therefore excludes amendments unless you ask for them:

• sec_financial_concept's annual/quarterly period filters match base forms only. The amended period is already covered by the original filing, and admitting both would report two facts for one period. Pass include_amendments: true to admit them when the restatement is what you want: Apple's fiscal 2009 revenue is $36.5B on the original 10-K and $42.9B on the 10-K/A. amended_facts then counts them.
• sec_full_text_search with a form filter drops amendments. EDGAR itself does not: it filters on a filing's root form, so forms=10-K also returns 10-K/A. To get amendments, request the form directly (10-K/A), list both (10-K,10-K/A), or pass include_amendments: true. Any amendment returned is marked amendment: true.

Because that search filtering happens after EDGAR's, two parts of the response behave differently from a plain search:

• total is still EDGAR's count, which includes the dropped amendments. It is flagged total_is_upper_bound, or total_is_approximate when it has also saturated at 10000. Each page reports amendments_excluded.
• Paging must use next_offset. A page can return fewer than limit hits because amendments were skipped, so offset + returned would revisit them.

Common XBRL concepts for sec_financial_concept

Concept	What it is
Revenues	Total revenues
NetIncomeLoss	Net income / loss
EarningsPerShareBasic	Basic EPS
EarningsPerShareDiluted	Diluted EPS
Assets	Total assets
Liabilities	Total liabilities
StockholdersEquity	Shareholders' equity
OperatingIncomeLoss	Operating income / loss
CashAndCashEquivalentsAtCarryingValue	Cash and equivalents
CommonStockSharesOutstanding	Shares outstanding

Development

cargo test          # offline; hits no network

There is also an opt-in live suite that drives the built server over stdio against the real SEC EDGAR APIs — the thing offline tests can't see, like EDGAR changing a response shape or a URL-construction quirk slipping through. It is skipped unless SEC_MCP_LIVE_EMAIL is set, which both opts in and supplies the contact email the fair-access policy requires (the address is read from the environment, never committed):

SEC_MCP_LIVE_EMAIL="[email protected]" cargo test --test live_smoke -- --nocapture

The suite runs sequentially through one server process, so it stays well within EDGAR's rate limit.

License

MIT — see LICENSE.md for details.

MCP registry

Ownership-verification token for the MCP registry (read from this crate's rendered README on crates.io):

Registry ownership token: mcp-name: io.github.brechanbech/sec-mcp

Releasing

A version is immutable once published — crates.io yanks, it does not delete, and a number is never reused — so the order matters:

1. cargo test and cargo clippy --all-targets clean.

2. Bump version in Cargo.toml.

3. Bump version in server.json — both fields, the top-level one and the one under packages[]. Nothing enforces this: no script, no CI, no test reads the file, and it is the step that goes missing. This manifest stayed correct, but the registry entry did not: 0.5.0, 0.5.1 and 0.5.2 all shipped to crates.io while the registry still advertised 0.4.4, because step 6 was never run.

4. Commit and push; let CI go green before publishing rather than after.

5. cargo publish --dry-run, which compiles from the packaged copy and so catches a crate depending on a file it does not ship. Then cargo publish. Give both --target-dir target/package-verify. Without it, the verify build shares target/debug with ordinary builds under the same unit hash, so the binary's fingerprint ends up tracking the packaged src/main.rs rather than yours. Later edits then never rebuild target/debug/sec-mcp, and the offline stdio test in tests/live_smoke.rs silently runs the published code. If that has happened, cargo clean -p sec-mcp repairs it.

6. Publish to the MCP registry, after crates.io and not before — the registry verifies the namespace by reading mcp-name from this crate's rendered README on crates.io, and server.json names a cargo version that must already exist there:

   mcp-publisher validate      # checks server.json against the live registry
   mcp-publisher login github  # interactive, for the io.github.brechanbech/* namespace
   mcp-publisher publish
   

7. Create a release for the tag on both Codeberg and the GitHub mirror, with the version's CHANGELOG section as notes. A tag alone is not a release: Glama reads the GitHub mirror and reported "No stable releases found" while it carried every tag and no release.