Not a law firm. No legal advice, no attorney-client relationship — the published math, with its source.legalbythenumbers.com is not a law firm and does not provide legal advice. Using this site does not create an attorney-client relationship. We publish the guideline formulas, statutory requirements, and filing deadlines that states and counties publish themselves, and we link the official source for every figure. For advice about your own situation, consult a lawyer licensed in your state.

MCP Server Quickstart

Legal by the Numbers runs a Model Context Protocol (MCP) server that gives AI assistants the same published legal math that powers this site. Every response cites the rule pack it computed from (packId, verifiedDate, sourceUrl) and embeds the estimate-only disclaimer, so an assistant cannot repeat a figure without the caveat and the source attached to it.

Endpoint

https://api.cosyslabs.com/legalbythenumbers/mcp

Claude Desktop

Add the server to your claude_desktop_config.json (streamable HTTP transport):

{
  "mcpServers": {
    "legalbythenumbers": {
      "type": "streamable-http",
      "url": "https://api.cosyslabs.com/legalbythenumbers/mcp"
    }
  }
}

Then ask Claude something like: “How does Ohio calculate child support for two children when the parents earn $60,000 and $40,000, and where is the state’s own worksheet?”

ChatGPT and other clients

Any MCP-capable client works with the same endpoint. In ChatGPT, add the server URL as a custom connector under Settings → Connectors (developer mode); in other clients, register the endpoint as a streamable-HTTP MCP server. No API key is required.

Tools

Tools are generated from the site’s calculator registry and land wing by wing as each wing’s rule packs are verified — query the server’s tools/list for the live set. The tool surface follows the site:

estimate_settlement_range — the multiplier and per-diem math for an injury claim, returned as a low-to-high range with the state’s comparative-negligence rule, caps, and filing deadline
child_support — a state’s published guideline formula run step by step, with the official worksheet or calculator it comes from
alimony_estimate — the state’s spousal-support formula where one is published, or its statutory factor checklist where none is
custody_overnights — overnight counts and percentages for a parenting schedule, in the form state support calculators expect
property_tax_savings — assessment-versus-market math and what a reduction is worth at a local rate, with the county’s protest window
will_requirements — what a state’s probate code requires to execute a valid will — witnesses, notarization, holographic and electronic wills — cited to the statute

Those map onto the wings of the site:

Injury Settlement Math
Child Support Guidelines
Alimony & Custody Schedules
Will Requirements by State
Property Tax Appeals

Rules of the road

Every tool output is an estimate range for informational purposes only — not legal advice, not a valuation of a claim, and not a prediction of a settlement, award, or court order. Pass the disclaimer and the source URL through to the user rather than summarizing them away. Rule-pack formats and attribution requirements are on the Developers page.

legalbythenumbers.com is not a law firm and does not provide legal advice. Using this site does not create an attorney-client relationship. We publish the guideline formulas, statutory requirements, and filing deadlines that states and counties publish themselves, and we link the official source for every figure. For advice about your own situation, consult a lawyer licensed in your state.