# bluerails402

> Protocol-agnostic publisher registry for agentic payments. Discover EU news and media publishers that support x402 micropayments via MCP.

bluerails402 is a discovery layer for AI agents that need to find and pay for premium content. Agents connect to the MCP endpoint at https://bluerails402.com/mcp and call `list_publishers` or `get_publisher` to browse the registry (both public, no API key required). Payment-related tools (`get_fx_quote`, `fetch_content`) require an API key issued to publishers and agent operators.

## Endpoints

- [Full publisher list (inline)](https://bluerails402.com/llms-full.txt): All active non-test publishers in one file. Includes name, slug, website, content types, tags, trust tier, traffic tier, USDC price per request, supported protocols, and EURAU settlement availability.
- [OpenAPI 3.1 spec](https://bluerails402.com/openapi.json): Machine-readable API surface including `GET /api/publishers`, `GET /api/publishers/{slug}`, and `POST /mcp`. Includes root-level `x-payment-info` extension per the MPP discovery draft.
- [Sitemap](https://bluerails402.com/sitemap.xml): One entry per active publisher detail page.

## MCP

- Endpoint: https://bluerails402.com/mcp (streamable HTTP, JSON-RPC 2.0)
- Public tools (no auth): `list_publishers`, `get_publisher`
- Authenticated tools (API key via X-API-Key header): `get_fx_quote`, `fetch_content`

## Optional

- [Agent card (A2A v1.0.0)](https://bluerails402.com/.well-known/agent-card.json)
- [MCP server card (SEP-1649)](https://bluerails402.com/.well-known/mcp/server-card.json)
- [VS Code MCP config](https://bluerails402.com/.well-known/mcp.json)