---
title: "Streamable HTTP MCP (JSON-RPC). Unauthenticated initialize stays open; Bearer tokens map to an OAuth identity."
method: POST
path: "/mcp"
---

# Streamable HTTP MCP (JSON-RPC). Unauthenticated initialize stays open; Bearer tokens map to an OAuth identity.

`POST /mcp`

## Request

- Base URL: `https://api.lodestarstamp.com`
- URL: `https://api.lodestarstamp.com/mcp`
- Auth: one of:
  - none
  - API key in header `X-Lodestar-Key`
  - OAuth 2 (authorization code, authorization URL `https://api.lodestarstamp.com/oauth/authorize`, token URL `https://api.lodestarstamp.com/oauth/token`, scopes: `mcp:read`)
  - API key in header `PAYMENT-SIGNATURE`

## Response `200`

JSON-RPC

## Other responses

- `202`: Notifications only: accepted, no body
- `401`: Invalid Bearer; WWW-Authenticate names resource_metadata

---

[API](https://skmtc.dev/lodestarstamp/apis/lodestar-trust-api.md) · [All operations](https://skmtc.dev/lodestarstamp/apis/lodestar-trust-api/llms.txt) · [OpenAPI document](https://skmtc.dev/lodestarstamp/apis/lodestar-trust-api/revisions/af78368ab7a5?raw)