REST API + MCP

One key.
Every filing type.
Cited JSON.

A REST API and MCP server over the FilingExplorer data layer. 100 free requests a month, no card. First call in five minutes.

Get your free API key Read the docs

insider-trades.sh

# Latest insider trades — as cited JSON
$ curl -H "Authorization: Bearer $FE_API_KEY" \
    "https://api.filingexplorer.com/v1/forms/4?ticker=AAPL&limit=3"

# Every row carries the filing it came from
{
  "filings": [{
    "accession_number": "0000320193-26-000071",
    "filing_date": "2026-02-03",
    "issuer": {
      "name": "Apple Inc.",
      "cik": "320193",
      "trading_symbol": "AAPL"
    },
    "reporting_owners": [{
      "name": "Cook Timothy D",
      "relationships": {
        "is_officer": true,
        "officer_title": "Chief Executive Officer"
      }
    }],
    "rule_10b5_1_plan": true,
    "rule_10b5_1_source": "explicit"
  }]
}

rule_10b5_1_plan is three-valued. true and false are affirmative disclosures by the filer; null means the filing never disclosed plan status at all — read it as unknown, not as false. rule_10b5_1_source tells you which of the three you got.

Free means free.

Every account can create a free API key with 100 requests a month. No card, no trial clock, no sales call. When your agent outgrows it, Plus is $12 a month for 1,000 requests a day and full history.

First call in five minutes

Three steps from zero to a cited JSON response.

Create an account

Make your first call

Add your key as a Bearer token and hit any endpoint. Run the sample above as-is.

Connect your agent

Prefer to ask in plain English? Add the MCP server below to Claude, Codex, Cursor or any MCP client, and your agent picks the right tool for each question. Bring it into your agent ↓

Model Context Protocol · v0.1

Bring it into your agent

filingexplorer-mcp is an open-source MCP server for the FilingExplorer API. It works with Claude, Codex, Cursor, Hermes and any other MCP client that runs local servers.

It runs on your machine and calls the API with your own key, with no hosted service in between. Responses are compact enough for a context window, and filing text comes back exactly as filed, with no AI summaries.

Company profiles, filing lists and reported financials
Verbatim 10-K, 10-Q, 20-F and S-1 sections and exhibits
13F portfolios and top holders, quarter over quarter
Form 4 trades, including Rule 10b5-1 disclosure, and insider buying clusters
ETF holdings from N-PORT filings
Your watchlists, read and write
Open source, Apache-2.0

Lobbying, Form ADV and earnings calls are on the REST API but not in the MCP server yet. Tool names and outputs may change between 0.x versions.

View on GitHub Changelog

"What did Berkshire Hathaway add to its portfolio last quarter?"

"Who are the largest institutional holders of NVDA, and who sold?"

"Get the risk factors from Tesla's latest 10-K."

"List this year's Form 4 sales at Apple and say which were under a 10b5-1 plan."

Claude Code · Codex

# Claude Code
claude mcp add filingexplorer --env FILING_EXPLORER_API_TOKEN=your-key \
  -- uvx filingexplorer-mcp

# Codex
codex mcp add filingexplorer --env FILING_EXPLORER_API_TOKEN=your-key \
  -- uvx filingexplorer-mcp

Claude Desktop · Cursor · other MCP clients

{
  "mcpServers": {
    "filingexplorer": {
      "command": "uvx",
      "args": ["filingexplorer-mcp"],
      "env": { "FILING_EXPLORER_API_TOKEN": "your-key" }
    }
  }
}

Needs Python 3.10+ or uv. Your key stays on your machine.

Endpoints by dataset

One data layer, every filing type. Full schemas and parameters in the API reference.

Full API reference

13F institutional portfolios

Quarterly holdings with QoQ position changes, concentration, and turnover.

Form 4 insider trades

Transactions with net direction, reporting-owner roles, and cluster detection.

Form ADV advisers

Firm lookup, ownership chains, private funds, and disciplinary records.

13D/G stakes

Beneficial-ownership stakes and the activists behind them.

N-PORT fund holdings

Fund and ETF holdings by symbol, CUSIP, or exchange.

XBRL financials

Ten fiscal years of statement data, normalized across companies.

Earnings-call transcripts

Attributed transcripts with extracted financial signals.

8-K events

Material corporate events, parsed and dated.

Lobbying disclosures

Senate LDA spending with growth metrics and anomaly scores.

Filing text extraction

10-K sections as clean markdown, ready for your pipeline.

Rate limits & tiers

Start where you are. Scale when your agent does.

Feature	Free	Plus · $12/mo	Premium · $34/mo
Requests	100 / month	1,000 / day	2,000 / day
API keys	2	5	5
History	Recent	Full	Full
CSV export	—	✓	✓
Value-investing endpoints	—	—	✓
Running backtests (beta feature)	—	✓	✓
Claude plugin	At launch	At launch	At launch
MCP server	Every tool	Every tool	Every tool

See full pricing

Data rights, in plain language

Everything we serve derives from public regulatory filings. Store it, analyze it, build products on it. Cite us on published output. Don't resell bulk raw dumps.

Full terms in the ToS

Not building? Just researching?

The FilingExplorer plugin will give Claude a research desk — investment-research skills that run real methodology against real filings, every answer cited to its filing. It isn't open to the public yet; until it is, the same data is live over the API and MCP server.

See what's coming

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Get your API key and make your first cited call in minutes.

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One key. Every filing type. Cited JSON.