# corpuslaw.us — legal services — 2 of 5

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> Probe-verified (tier 2 of 3). Last checked 2026-09-26. 2 of 5 capability checks passed. 2 unknown.

- host: corpuslaw.us
- url: https://corpuslaw.us/
- category: legal services
- type: business
- country: US
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-09-26 against rubric v1.2. 2 of 5 checks passed. 2 unknown.

- UNKNOWN — Markdown negotiation (`Accept: text/markdown`)
- UNKNOWN — Markdown twin at a predictable URL (`/page.md`)
- PASS — llms.txt (`/llms.txt`)
- FAIL — API catalog (`RFC 9727`)
- PASS — MCP endpoint answers tools/list (`initialize → tools/list, no credentials`) · on 26 Sep 2026
  - UNKNOWN — MCP server card (`/.well-known/mcp/server-card.json`): could not ask; not scored
  - Platform-supplied: no; not scored
- FAIL — Other agent files at well-known paths (`agent-skills/index.json · oauth-authorization-server · oauth-protected-resource · http-message-signatures-directory`): none found; not scored

MCP tools (from tools/list on 2026-09-26): law.search, law.get_node, law.list_coverage, account.status, formation.requirements, formation.compare, formation.lookup_naics, formation.handoff, formation.checkout, formation.payment_status

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **order** — "" → `https://corpuslaw.us/formation`

## Summary

Corpus provides US law search, citation, and business formation services, enabling formation of LLCs in all 50 states plus DC and nonprofit corporations in 48 states. It offers state filing checklists, fees, NAICS codes, and compares formation providers with verified coverage.

## Context

427 sites in this index share the category "legal services"; 63 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark

How we found this site: probe discovery. This site didn't declare agent access — we found it by checking the open web. Everything above was tested the same way, against the same rubric, on the date shown. [How we choose what to check, and how to opt out](https://knowngood.sh/bot)

## Where this sits

- United States: https://knowngood.sh/country/US
- business: https://knowngood.sh/type/business
- legal services: https://knowngood.sh/category/legal-services
- Browse: https://knowngood.sh/browse
- Rubric: https://knowngood.sh/benchmark