# HakiChain API & developer resources — agent index

API, OpenAPI, authentication, MCP, and integration guidance for agents. Return to the [main HakiChain agent index](https://hakichain.com/llms.txt).

## When to use this

Use these developer resources when an agent needs to integrate with or explain the **HakiChain public discovery API** — not customer-matter APIs. Call `GET /api/v1/platform` first, then follow OpenAPI and the Deprecation/Sunset policy before coding against `/api/v1`.

## HakiChain API documentation (search by name)

- [HakiChain developer portal](https://hakichain.com/developers) — human-readable API overview
- [HakiChain API docs](https://hakichain.com/api) — predictable alias for the developer portal
- [HakiChain OpenAPI 3.1 specification](https://hakichain.com/openapi.json) — machine-readable API description
- [HakiChain OpenAPI](https://hakichain.com/openapi) — predictable alias for the OpenAPI document
- [HakiChain public discovery API](https://hakichain.com/api/v1/platform) — `GET /api/v1/platform`, no authentication
- [HakiChain API deprecation policy](https://hakichain.com/developers/deprecation-policy) — `Deprecation` and `Sunset` headers, 90-day notice
- [HakiChain API deprecation policy (Markdown)](https://hakichain.com/developers/deprecation-policy.md)

## Authentication

The public discovery API requires **no credentials**. Customer-data APIs for matters, documents, reminders, and workspaces require an approved integration and authenticated credentials from HakiChain. Contact [info@hakichain.com](mailto:info@hakichain.com) for enterprise API access.

## HakiChain MCP server

HakiChain provides a **HakiLens MCP** (Model Context Protocol) research server for approved enterprise integrations. MCP server access is not public; contact [info@hakichain.com](mailto:info@hakichain.com) for MCP deployment credentials.

## HakiChain CLI

Use the public HTTP API and [OpenAPI specification](https://hakichain.com/openapi.json) today. An official npm CLI is planned — contact [info@hakichain.com](mailto:info@hakichain.com) for early access.

## Rate limits and content negotiation

- Public discovery API: **60 requests/minute** per caller
- Responses include `RateLimit`, `RateLimit-Limit`, `RateLimit-Remaining`, `RateLimit-Reset`; HTTP 429 includes `Retry-After`
- Request `Accept: text/markdown` on `/api/v1/platform`, `/developers`, `/developers/deprecation-policy`, or `/` for Markdown

## Example request

```bash
curl -s -H "Accept: application/json" https://hakichain.com/api/v1/platform
```

## Related indexes

- [Main agent index](https://hakichain.com/llms.txt)
- [Agent instructions](https://hakichain.com/agent-instructions.txt)
- [Full agent reference](https://hakichain.com/llms-full.txt)
- [Documentation index for agents](https://hakichain.com/docs/llms.txt)