Corpus Law
REMOTE · CORPUSLAW.US · SCANNED SEP 28
Search and cite US law from official sources, then form an LLC or nonprofit with free agent tools.
Available components
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. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability74
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
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.
remote · corpuslaw.us
claude mcp add --transport http us-corpuslaw-corpus-legal 'https://corpuslaw.us/api/mcp'
{
"mcpServers": {
"us-corpuslaw-corpus-legal": {
"url": "https://corpuslaw.us/api/mcp"
}
}
} {
"servers": {
"us-corpuslaw-corpus-legal": {
"type": "http",
"url": "https://corpuslaw.us/api/mcp"
}
}
} [mcp_servers.us-corpuslaw-corpus-legal] url = "https://corpuslaw.us/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"us-corpuslaw-corpus-legal": {
"type": "remote",
"url": "https://corpuslaw.us/api/mcp",
"enabled": true
}
}
} openclaw mcp add us-corpuslaw-corpus-legal --url 'https://corpuslaw.us/api/mcp' --transport streamable-http
mcp_servers:
us-corpuslaw-corpus-legal:
url: "https://corpuslaw.us/api/mcp" {
"McpServers": {
"us-corpuslaw-corpus-legal": {
"Transport": "http",
"Url": "https://corpuslaw.us/api/mcp"
}
}
} assistant mcp add us-corpuslaw-corpus-legal -t streamable-http -u 'https://corpuslaw.us/api/mcp'
{
"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.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 28 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Sept 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 21 Sept 26 +1
- 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 security
- 18 Sept 26 +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.
- 16 Sept 26 +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.
- 14 Sept 26 +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.
- 13 Sept 26 0
- The server rewrote its instructions, which are the text every model session reads security
- Schema quality: 204 → 227 ▼ functional
- New tool “formation.checkout” functional
- New tool “formation.payment_status” functional
- “formation.handoff” added an optional parameter “businessActivity” cosmetic
- 12 Sept 26 +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.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 28 Sept 2026 · Probed https://corpuslaw.us/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=corpuslaw.us | CN=YR1,O=Let's Encrypt,C=US | 31 Aug 2026 | 29 Nov 2026 | RSA 2048 | SHA256-RSA | 663c9ebaa705962b875126d20fc52c9d8ec |
| SANs: corpuslaw.us | ||||||
| CN=YR1,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | a20253f15f2691c05dc1ce13b9bcca4e |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of corpuslaw.us. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| us. | present | 59017 | 8 | Verified |
| corpuslaw.us. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
| content-security-policy | default-src 'self'; base-uri 'self'; object-src 'none'; frame-ancestors 'none'; form-action 'self'; script-src 'self' 'unsafe-inline' blob: https://va.vercel-scripts.com https://us-assets.i.posthog.com; worker-src 'self' blob:; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' data: https://fonts.gstatic.com; img-src 'self' data: blob: https://*.basemaps.cartocdn.com https://maidensail.com https://tools.launchllama.co; connect-src 'self' https://*.ingest.sentry.io https://*.ingest.us.sentry.io https://us.i.posthog.com https://us-assets.i.posthog.com https://*.basemaps.cartocdn.com https://va.vercel-scripts.com https://formatiutopilot-bfmjghskwt.us-west-1.fcapp.run wss://cockpit.74-208-44-221.nip.io; frame-src 'self' https:; upgrade-insecure-requests; report-uri /api/security/csp-report |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=(), payment=(), usb=(), interest-cohort=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://corpuslaw.us/api/mcp | Verified | 200 | |
| http (plaintext) | http://corpuslaw.us/api/mcp | HTTPS enforced | 308 | https://corpuslaw.us/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
account.status Check account status ~143
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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. |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
formation.checkout Check out a formation order in USDC ~469
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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. |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
formation.compare Compare LLC formation services ~235
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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). |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
formation.handoff Validate and hand off a formation draft ~531
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | 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 | yes | 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. |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
formation.lookup_naics Find a NAICS industry code ~82
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.
| Name | Type | Req | Description |
|---|---|---|---|
| businessDescription | string | yes | What the business does, in plain words. |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
formation.payment_status Check a formation order's USDC payment ~96
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.
| Name | Type | Req | Description |
|---|---|---|---|
| orderId | string | yes | The orderId formation.checkout returned. |
| trackingToken | string | yes | The trackingToken formation.checkout returned. |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
formation.requirements Get formation requirements ~122
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.
| Name | Type | Req | Description |
|---|---|---|---|
| entityType | string | yes | Entity type to form. |
| state | string | yes | Two-letter US state code, e.g. 'MS', 'WY', 'DE'. |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
law.get_node Get a law provision ~51
Fetch the full text, citation, and hierarchy of a single legal provision by its node id (a UUID returned by law.search).
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | Node UUID, as returned in law.search results. |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
law.list_coverage List covered jurisdictions ~59
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.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
law.search Search US law ~223
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).
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | Natural-language or keyword query, e.g. 'distillery permit requirements'. |
| Name | Type | Req | Description |
|---|---|---|---|
| isError | boolean | – | True when the tool could not complete successfully. |
| text | string | yes | Human-readable tool result (also mirrored in content[].text). |
No examples provided.
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.