---
title: "Register an MCP / tool passport"
method: POST
path: "/v1/me/tools"
tags: ["tool-passport"]
---

# Register an MCP / tool passport

`POST /v1/me/tools`

## Request

- Base URL: `https://api.lithtrix.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://api.lithtrix.ai/v1/me/tools`
- Auth: none declared

Issue a new Ed25519 tool passport for this agent account. **Requires root ``ltx_*``** API key. Returns ``private_key`` once. Optional ``model_provenance`` is captured, not verified.

## Headers

- `authorization` string, nullable

## Request body

- ToolRegisterRequest: Optional developer-declared model provenance hash at registration.
  - `model_provenance` string, nullable: Developer-declared hash or label for the tool's underlying model (captured, not verified).
  - `risk_class` string, nullable: Registrant-declared risk class: ``low`` or ``high`` (default ``low``; captured, not verified).

## Response `201`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/lithtrix/apis/lithtrix-api.md) · [All operations](https://skmtc.dev/lithtrix/apis/lithtrix-api/llms.txt) · [OpenAPI document](https://skmtc.dev/lithtrix/apis/lithtrix-api/revisions/be5de51bf4f8?raw)