"NextBillion.ai" matching MCP connectors:

Disposable private vector search + semantic RAG for AI agents. x402 pay-per-call, no account.

Elasticsearch + MongoDB + Redis Stack Generator (Elasticsearch/Elasticsearch)

NeuralBrain MCP Server - RAG, Vector Memory, LLM Routing, Agent Identity, x402 Payments

Same functionality, consuming only 1/20 of the context window tokens.