MassEngine Early Access
// SYS.VEC.v1.0 HIGH-DIMENSIONAL VECTOR DATABASE ENGINE

Sub-5ms Filtered Vector Search at Planet Scale

Deterministic low-latency vector retrieval engineered for multi-tenant production workloads. Combine dense embeddings with rich structured predicates in a single atomic query pass—without memory bloat or tail-latency spikes.

Reserve Early Access [BATCH // Q4-2026]

Request priority provisioning for MassEngine Cloud or self-hosted enterprise cluster images.

SHA-256 POW PROTECTED ZERO TELEMETRY // SOC2 READY 
POST /v1/tenants/acme_prod/search HTTP/1.1
Host: api.massengine.com
Authorization: Bearer me_live_98a4f2c1e0b7...
Content-Type: application/json

{
  "vector": [-0.0184, 0.0921, 0.0447, -0.0612, /* ... 1536 dims */],
  "top_k": 10,
  "min_score": 0.82,
  "filter": {
    "region": { "$eq": "us-east" },
    "clearance_level": { "$gte": 3 },
    "tags": { "$contains": "sec-filing-10k" },
    "archived": { "$ne": true }
  }
}

// HTTP/1.1 200 OK — X-Execution-Time-Ms: 2.41
{
  "results": [
    {
      "id": "doc_894210",
      "score": 0.9642,
      "metadata": { "region": "us-east", "clearance_level": 4 }
    }
  ],
  "latency_ms": 2.41
}
POST /v1/tenants/acme_prod/upsert HTTP/1.1
Host: api.massengine.com
Authorization: Bearer me_live_98a4f2c1e0b7...
Content-Type: application/json

{
  "documents": [
    {
      "id": "doc_894210",
      "vector": [-0.0184, 0.0921, 0.0447, -0.0612],
      "metadata": {
        "region": "us-east",
        "clearance_level": 4,
        "tags": ["sec-filing-10k", "fy2026"],
        "archived": false
      }
    }
  ]
}

// HTTP/1.1 200 OK — Raft Quorum Committed
{
  "upserted": 1,
  "status": "committed",
  "latency_ms": 1.18
}
PATCH /v1/tenants/acme_prod/docs/doc_894210 HTTP/1.1
Host: api.massengine.com
Authorization: Bearer me_live_98a4f2c1e0b7...
Content-Type: application/json

// In-place metadata mutation without re-embedding or vector re-indexing
{
  "set": {
    "clearance_level": 5,
    "reviewed_by": "risk-committee"
  },
  "unset": ["temporary_hold"]
}

// HTTP/1.1 200 OK — Zero Vector Re-Computation
{
  "id": "doc_894210",
  "patched": true,
  "latency_ms": 0.42
}
STATUS: 200 OK P99 LATENCY: 2.41 ms
RECALL@10: 0.994
// 01VERIFIED LATENCY & DENSITY TELEMETRY
100M VECTORS · 1536 DIMS · CONCURRENT FILTERED QUERIES
P99 Filtered Query Latency
2.8ms

Single-pass vector + structured metadata predicate evaluation at 99th percentile.

DRAM Footprint Reduction
10.4x

High-density memory hierarchy versus conventional in-memory graph indexes.

Isolated Tenants / Cluster
100K+

Zero noisy-neighbor cross-talk with cryptographic per-tenant key isolation.

Metadata Patch Throughput
0.4ms

Mutate document ACLs, prices, or tags in-place without re-computing embeddings.

// 02CORE ENGINE CAPABILITIES
ARCHITECTURAL SPECIFICATION
01 // TENANCY RBAC + SHA-256

Multi-Tenant Isolation

Onboard tens of thousands of customer namespaces on shared infrastructure without per-tenant index proliferation. Enforces strict tenant-scoped API keys and physical segment boundaries.

ISOLATION MODEL NAMESPACE-SCOPED RBAC
02 // QUERY ENGINE PREDICATE FUSION

Hybrid Dense Search

Combine high-dimensional cosine, dot-product, or L2 similarity with expressive boolean, numeric range ($gt, $lte), set membership ($in), and array predicates without post-filter recall collapse.

OPERATORS $EQ $NE $GT $GTE $IN $CONTAINS
03 // DETERMINISTIC SLA P99 < 5MS

Sub-5ms Tail Latency

Engineered in pure systems code with bounded allocation paths and hardware-accelerated vector kernels. Sustains flat tail latency even during heavy concurrent ingestion and compaction.

EXECUTION PATH SIMD ACCELERATED
04 // MUTABILITY ZERO RE-EMBED

In-Place Metadata Patching

Update document permissions, status flags, or attributes atomically via PATCH without resending or re-indexing high-dimensional float vectors.

OPERATION ATOMIC ATTRIBUTE OVERLAY
05 // DATA PIPELINE NDJSON STREAM

Wire-Speed Bulk Streaming

Ingest or migrate tens of millions of vectors per node over streaming NDJSON endpoints with automatic backpressure control and zero-downtime tenant snapshots.

TRANSPORT HTTP/2 STREAMING NDJSON
06 // DISTRIBUTED CORE RAFT CONSENSUS

Linear Horizontal Clustering

Scale out seamlessly across shards with strongly consistent Raft state replication, automated leader routing, and non-blocking online segment compaction.

CONSISTENCY QUORUM REPLICATED
// 03DEVELOPER API SURFACE
REST HTTP/JSON & OFFICIAL GO SDK
POST /v1/tenants/{tenant}/search

Execute filtered top-K similarity queries with configurable minimum score thresholds and pagination offsets.

POST /v1/tenants/{tenant}/upsert

Insert or update batches of dense vectors and structured JSON metadata with immediate consistency.

PATCH /v1/tenants/{tenant}/docs/{id}

Atomically set or unset metadata fields on existing documents in-place without re-uploading vector payloads.

POST /v1/tenants/{tenant}/import

Stream high-volume NDJSON document feeds directly into tenant partitions at line rate.