Public API

Statutory compliance dates for Indian entities, as JSON. No key, no sign-up, no rate limit today.

We built the compliance calculators on this site for founders. This API is the same logic, exposed so an AI agent, a script, or another product can call it directly instead of scraping a page. Every date it returns comes from the same deterministic date math behind our tools. Nothing here is generated by a language model.

The API has three parts: an MCP server for AI agents, a capability index, and a compliance calendar endpoint over plain HTTP.

MCP server

POST /api/mcp is a remote MCP server (streamable HTTP, stateless, no authentication). Eight tools: MCA late fees, the annual compliance calendar, the cheque bounce timeline, MSME delayed-payment interest, our free tools and templates, our services, a callback request, and how to reach us. Works as a custom connector in Claude, in Claude Code, and in any MCP-capable agent. Manifest at /.well-known/mcp.json.

claude mcp add --transport http buildwright https://buildwright.co.in/api/mcp

Capability index

GET /api/public returns a JSON description of every endpoint below: its parameters, an example URL, and what it returns. Point an agent at this URL first.

curl https://buildwright.co.in/api/public

Compliance calendar

GET /api/public/compliance-calendar returns the statutory filing deadlines for an LLP or a Private Limited company: form number, what it is, the due date, and the rule it comes from.

curl "https://buildwright.co.in/api/public/compliance-calendar?entityType=LLP&incorporationDate=2026-01-15"

Parameters

entityType required. LLP or Private Limited.
incorporationDate required. Format YYYY-MM-DD.
agmDate optional, Private Limited only. Leave it out and we assume the AGM lands on the statutory deadline itself, 30 September following the financial year end.
financialYearEnd optional. Defaults to 31 March.
companyCategory optional, Private Limited only. small, opc, or other. Decides whether the annual return is MGT-7A or MGT-7. Defaults to small, since most early-stage companies qualify.

Send an unknown or missing entityType and you get a 400 back listing the two values we accept.

Example response

{
  "entityType": "LLP",
  "inputs": {
    "incorporationDate": "2026-01-15",
    "agmDate": null,
    "financialYearEnd": null,
    "companyCategory": null
  },
  "deadlines": [
    {
      "form": "Form 3",
      "description": "LLP Agreement filing",
      "dueDate": "2026-02-14",
      "statutoryBasis": "Within 30 days of incorporation..."
    },
    {
      "form": "Form 11",
      "description": "Annual Return",
      "dueDate": "2027-05-30",
      "statutoryBasis": "Within 60 days of financial year end..."
    }
  ],
  "disclaimer": "BuildWright provides documentation, filing, and compliance facilitation...",
  "source": "https://buildwright.co.in/services/llp-incorporation"
}

This is documentation and filing facilitation. It is not legal advice. The disclaimer field above ships in every response for exactly that reason. Whatever calls this endpoint, human or agent, should carry that line forward to whoever reads the answer.

Prefer a page?

Same numbers, worked into a calculator, at the MCA late-fee calculator, or browse every free tool from the resources page.