MCP
MCP Overview
Tools, resources, and prompts through the Voidnet — protocol version 2026-07-28.
MCP apps expose callable tools, URI-addressable resources, and reusable prompts through one gateway endpoint. Protocol version 2026-07-28, stateless: no sessions, no initialize handshake, no Mcp-Session-Id, no GET/DELETE endpoints. SSE streams are per-request on POST; close = cancel.
At a glance
| Endpoint | POST /v1-beta/mcp/{username}/{appname} |
| Required headers | Authorization, Content-Type, MCP-Protocol-Version: 2026-07-28, Mcp-Method, Mcp-Name |
| Billing unit | Requests (per-call on usage-based pricing) |
| Start here | Buyer Guide to call · Publisher Guide to publish |
Methods
server/discover (capabilities first), tools/list, tools/call, resources/list, resources/read, prompts/list, prompts/get, subscriptions/listen (optional). Full shapes with examples live in the Buyer Guide.
Rules that bite
MCP-Protocol-Versionmust equal_meta.protocolVersionin the body, or the call fails400 HeaderMismatch.- Every proxied request carries your publisher key (
vnp-sk-*); validate it on every request. - Billable
tools/callresponses meter one request; list/discover calls never bill.