# Corpus Law (remote · corpuslaw.us)

Search and cite US law from official sources, then form an LLC or nonprofit with free agent tools.

- Trust score: 86/100 (high trust)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-28

## Components

- remote · `corpuslaw.us`: 86/100 (this document), [markdown](https://verifymcp.io/servers/us-corpuslaw-corpus-legal/api-mcp.md), [page](https://verifymcp.io/servers/us-corpuslaw-corpus-legal/api-mcp)

## Channel facts

- Endpoint: `https://corpuslaw.us/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.2.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-28.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 74/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 2831 tokens (~235/item across 12 items; 10 tools + 2 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 100/100
  - No destabilizing schema changes in the last 30 days.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Corpus Law MCP server?

Corpus Law is a hosted endpoint at https://corpuslaw.us/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http us-corpuslaw-corpus-legal 'https://corpuslaw.us/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "us-corpuslaw-corpus-legal": {
      "url": "https://corpuslaw.us/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "us-corpuslaw-corpus-legal": {
      "type": "http",
      "url": "https://corpuslaw.us/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.us-corpuslaw-corpus-legal]
url = "https://corpuslaw.us/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "us-corpuslaw-corpus-legal": {
      "type": "remote",
      "url": "https://corpuslaw.us/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add us-corpuslaw-corpus-legal --url 'https://corpuslaw.us/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  us-corpuslaw-corpus-legal:
    url: "https://corpuslaw.us/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "us-corpuslaw-corpus-legal": {
      "Transport": "http",
      "Url": "https://corpuslaw.us/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add us-corpuslaw-corpus-legal -t streamable-http -u 'https://corpuslaw.us/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "us-corpuslaw-corpus-legal": {
      "type": "http",
      "url": "https://corpuslaw.us/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-28 (score 86, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-25 (score 86, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-21 (score 86, +1)

- [security] Stability: 0.97 → pass
- [security] The server rewrote its instructions, which are the text every model session reads
- [security] Tool “formation.checkout” rewrote its description, which is the text the model reads

### 2026-09-18 (score 85, +1)

No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 84, +1)

No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 83, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 82, 0)

- [security] The server rewrote its instructions, which are the text every model session reads
- [functional regression] Schema quality: 204 → 227
- [functional] New tool “formation.checkout”
- [functional] New tool “formation.payment_status”
- [cosmetic] “formation.handoff” added an optional parameter “businessActivity”

### 2026-09-12 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (10)

### `law.search` (~223 tokens)

Search US law

Search US federal, state, and municipal law by topic or keyword — use it for any question about what the law currently says (legality, permits, zoning, licensing, compliance, filing requirements) rather than relying on training data, which has a cutoff. Returns ranked provisions with verbatim citations, headings, and snippets. Call this first to discover relevant law, then law.get_node for the full official text. Pass `jurisdiction` to scope to one state/federal/city (see law.list_coverage for codes).

Input parameters:

- `jurisdiction` (string): Optional short code to scope the search, e.g. 'TX', 'US', or 'CA-SF'. Call law.list_coverage for valid codes. Includes the jurisdiction's sub-jurisdictions.
- `limit` (integer): Number of results to return (1–25).
- `mode` (string): Retrieval mode. 'hybrid' (default) fuses vector similarity with keyword search.
- `query` (string, required): Natural-language or keyword query, e.g. 'distillery permit requirements'.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `law.get_node` (~51 tokens)

Get a law provision

Fetch the full text, citation, and hierarchy of a single legal provision by its node id (a UUID returned by law.search).

Input parameters:

- `id` (string, required): Node UUID, as returned in law.search results.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `law.list_coverage` (~59 tokens)

List covered jurisdictions

List which jurisdictions are ingested (federal, state, and municipal), with per-jurisdiction provision counts, searchable-chunk counts, GIS status, and a placeholder flag. Call this to see what law is available and searchable before searching.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `account.status` (~143 tokens)

Check account status

Check the credit balance, tier, rate limits, and upgrade options for the API key on this connection. Use it to budget before making metered calls. Free — this call does not consume a credit. Works without a key (anonymous callers get their free-tier numbers and the key URL); with a key it reports that key's balance and limits. It also returns a referral code: pass referral_code back on later calls to keep the same referral identity.

Input parameters:

- `referral_code` (string): An active referral code returned by an earlier account.status call. Pass it back to keep the same referral identity; if it is no longer active, account.status issues a new code instead.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `formation.requirements` (~122 tokens)

Get formation requirements

Get the EXACT intake checklist to form an LLC or nonprofit in a state: every required field, that state's quirk questions, live all-in pricing, and the optional EIN add-on with its price when available. Call this FIRST when the user wants to form a company, then collect the answers from them in conversation yourself — you are the intake agent. Free; does not consume credits.

Input parameters:

- `entityType` (string, required): Entity type to form.
- `state` (string, required): Two-letter US state code, e.g. 'MS', 'WY', 'DE'.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `formation.compare` (~235 tokens)

Compare LLC formation services

Compare LLC formation providers on price, recurring costs, registered-agent renewals, and machine/agent capabilities, from a dated dataset of 19 providers verified against primary sources. Call this when the user asks which formation service to use, whether a price is a good deal, how Corpus compares to a named competitor, or asks you to evaluate a 'best LLC services' list. Corpus is one of the compared providers and is scored with the same rubric including its own gaps — the response says so. Free; does not consume credits.

Input parameters:

- `limit` (integer): How many providers to return in a ranked view. Default 5, max 19. Ignored when 'providers' is given.
- `providers` (array): Specific providers to compare, by name or slug (e.g. ['corpus','legalzoom']). Omit for a ranked field. Anything with no dossier is named back to you rather than dropped.
- `view` (string): overall (default, by Agentic Readiness) · lowest_total_cost (parsed first-year estimate) · most_transparent · most_agentic · developer (public MCP/API only).

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `formation.lookup_naics` (~82 tokens)

Find a NAICS industry code

Find candidate NAICS industry codes for a plain-English business description (needed for every LLC, and for nonprofits in AK, CT, LA, MS, TN, WV). Present 2–6 options to the user and confirm before recording one. Free; does not consume credits.

Input parameters:

- `businessDescription` (string, required): What the business does, in plain words.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `formation.handoff` (~531 tokens)

Validate and hand off a formation draft

Validate a formation draft and generate the prefilled handoff link on corpuslaw.us. Pass EVERYTHING you have collected (people, address, management, EIN answers, state-specific answers — see formation.requirements for the checklist). The response says exactly what is still missing — keep collecting and call again until COMPLETE, then give the user the link: it opens the formation agent with every detail pre-loaded, so they only review, sign in, and pay. Free; does not consume credits.

Input parameters:

- `businessActivity` (string): In one plain sentence, what the business actually does, in the founder's words (not the company name). Corpus researches the licenses and permits that apply from this.
- `contactEmail` (string): Founder contact email.
- `ein` (object): Optional EIN (federal tax ID) add-on, when available — formation.requirements says whether it can currently be sold and at what price. Never quote a remembered EIN price; use the one that call return…
- `entityType` (string, required): Entity type to form.
- `management` (string): LLC management type.
- `naicsCode` (string): NAICS industry code, 2–6 digits (use formation.lookup_naics to find it).
- `nonprofit` (object): Nonprofit-only fields.
- `parties` (array): The people. LLC: at least one 'member' and an 'organizer' (same person may hold both roles — pass two entries). Nonprofit: an 'incorporator' and at least 3 'director' entries (plus officers where the…
- `principalOffice` (object): Principal office address (street, city, state required for a complete draft).
- `proposedName` (string): Proposed company name.
- `referral_code` (string): Your referral code from account.status, if you have one. The founder saves 25% of the Corpus service fee and the order is credited to your code. Omit it if you do not have one — an absent or unrecogn…
- `state` (string, required): Two-letter US state code, e.g. 'MS', 'WY', 'DE'.
- `stateSpecificAnswers` (object): Per-state quirk answers under the EXACT keys shown by formation.requirements (e.g. "would_you_like_to_list_members_managers_on_the_state_record"). Values are strings or booleans.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `formation.checkout` (~469 tokens)

Check out a formation order in USDC

Create the founder's formation order and get a USDC (Solana) payment request — no API key, no Corpus sign-in. Payment is USDC on Solana ONLY. First call: pass the COMPLETE draft (the same fields formation.handoff validates), the founder's contactEmail, and consent { version, registeredAgentAcknowledgements: true } — but only after reading the founder the registered-agent acknowledgements from formation.requirements word for word and getting an explicit yes. Pass an idempotencyKey and reuse it on retry. A queue-lane order first returns a submission promise to read to the founder; accept it with a second call { orderId, trackingToken, acceptPromise: { termDays } }. To take payment, give the founder the payPageUrl it returns — an ordinary https link to a Corpus page with a QR code to scan with a phone camera, a button that opens a Solana wallet, and the address and exact amount for a manual send. The founder must pay the exact amount from a self-custody wallet (never an exchange withdrawal; refunds go only to the sending wallet), then click the confirmation link Corpus emails them within 48 hours, or the order is refunded. Nothing is filed before that confirmation and human review. The tax-ID add-on cannot be bought here. Free; does not consume credits.

Input parameters:

- `acceptPromise` (object): Second call, queue lane only: the founder accepted the submission promise with this many days.
- `consent` (object): First call: the founder's attestation to the registered-agent acknowledgements, read to them verbatim. `version` is the consentVersion formation.requirements shows.
- `contactEmail` (string): First call: the founder's email. The confirmation link is sent here; nothing files until they click it.
- `draft` (object): First call: the complete formation draft, the same shape formation.handoff takes.
- `idempotencyKey` (string): A random id you generate once per order and reuse on every retry; the same order is returned for 24 hours.
- `orderId` (string): Second call (or to refresh an expired charge): the orderId returned earlier.
- `trackingToken` (string): Second call: the trackingToken returned with the orderId.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

### `formation.payment_status` (~96 tokens)

Check a formation order's USDC payment

Poll the USDC payment for an order created by formation.checkout: awaiting, paid, expired, underpaid or held, plus whether the founder has confirmed by email (required within 48 hours of payment). Reading the chain also records a payment that just arrived. Free; does not consume credits.

Input parameters:

- `orderId` (string, required): The orderId formation.checkout returned.
- `trackingToken` (string, required): The trackingToken formation.checkout returned.

Output parameters:

- `isError` (boolean): True when the tool could not complete successfully.
- `text` (string): Human-readable tool result (also mirrored in content[].text).

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/us-corpuslaw-corpus-legal/api-mcp#diagnostics

## Score history

- 2026-09-28: 86
- 2026-09-27: 86
- 2026-09-26: 86
- 2026-09-25: 86
- 2026-09-24: 86
- 2026-09-23: 86
- 2026-09-22: 86
- 2026-09-21: 86
- 2026-09-20: 85
- 2026-09-19: 85
- 2026-09-18: 85
- 2026-09-17: 84
- 2026-09-16: 84
- 2026-09-15: 83
- 2026-09-14: 83
- 2026-09-13: 82
- 2026-09-12: 82
- 2026-09-11: 81
- 2026-09-10: 81
- 2026-09-09: 80
- 2026-09-08: 80
- 2026-09-07: 79
- 2026-09-06: 79
- 2026-09-05: 78
- 2026-09-04: 78
- 2026-09-03: 77
- 2026-09-02: 77
- 2026-09-01: 76
- 2026-08-31: 76
- 2026-08-30: 76

## Common questions

### What is the Corpus Law MCP server?

Corpus Law is an MCP server listed in the public MCP registry as us.corpuslaw/corpus-legal. Search and cite US law from official sources, then form an LLC or nonprofit with free agent tools. This page covers its hosted endpoint (https://corpuslaw.us/api/mcp).

### Is the Corpus Law MCP server safe to use?

Corpus Law scores 86 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Corpus Law MCP server expose?

Corpus Law exposes 10 tools: law.search, law.get_node, law.list_coverage, account.status, formation.requirements, and 5 more. Their descriptions and schemas cost roughly 2,011 tokens of context every time the server is loaded.

### Does the Corpus Law MCP server require authentication?

No. We connected to Corpus Law without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Corpus Law MCP server still maintained?

Corpus Law is still listed as active in the MCP registry. We last reached this channel on 28 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://corpuslaw.us/api/mcp
- Website: https://corpuslaw.us/docs/mcp
- Changelog RSS feed: https://verifymcp.io/servers/us-corpuslaw-corpus-legal/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/us-corpuslaw-corpus-legal/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/us-corpuslaw-corpus-legal/api-mcp