Neonia

The core infrastructure layer — graph memory, pub/sub queues, and system MCP tools — is free with no usage caps, per the vendor. Agents share a persistent causal graph (backed by SurrealDB) so a rule one agent writes is immediately readable by every other agent in the swarm, without a local database in sight. Token overhead on large payloads gets handled by compressing data on the backend and returning a lightweight pointer (neonia://) instead of injecting raw content into the context window. The billing model is pay-per-invocation via HTTP 402, charged at $0.001 precision per tool call, so cost scales with actual usage rather than a fixed subscription. The wall appears when your agents need custom tooling at the edge or multi-region residency — Neonia is cloud-only with no self-hosted option.