Head to head · Db vector · October 2026 research run
Milvus and Zilliz Cloud API + MCP vs Upstash Vector API + MCP
Upstash Vector API + MCP has a score of 62.4 (B) against Milvus and Zilliz Cloud API + MCP's 57.5 (C). Both do db vector. The largest gap is maintenance & community, 39 points.
Milvus and Zilliz Cloud API + MCPZilliz · HTTP API
C57.5/100#293 of 452
Upstash Vector API + MCPUpstash · HTTP API
B62.4/100#218 of 452
Which one, for what
Pick Milvus and Zilliz Cloud API + MCP for
- reliability (+10)
- schema & documentation (+20)
- maintenance & community (+39)
Pick Upstash Vector API + MCP for
- agent ergonomics (+13)
- security & auth (+10)
- payments & pricing (+5)
- transparency & trust (+12)
Score by category
| Category | Weight this run | Milvus and Zilliz Cloud API + MCP | Upstash Vector API + MCP | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 85 | 75 | Milvus and Zilliz Cloud API + MCP +10 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 69 | 49 | Milvus and Zilliz Cloud API + MCP +20 |
| Agent ergonomics | 13%16.2 | 62 | 75 | Upstash Vector API + MCP +13 |
| Security & auth | 14%17.5 | 53 | 63 | Upstash Vector API + MCP +10 |
| Payments & pricing | 10%12.5 | 35 | 40 | Upstash Vector API + MCP +5 |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 85 | 46 | Milvus and Zilliz Cloud API + MCP +39 |
| Transparency & trust | 7%8.8 | 70 | 82 | Upstash Vector API + MCP +12 |
| Negative events | ≤15 | -8 | 0 | |
| Total | 57.5 · C | 62.4 · B |
Facts side by side
| Fact | Milvus and Zilliz Cloud API + MCP | Upstash Vector API + MCP |
|---|---|---|
| Kind | HTTP API | HTTP API |
| Vendor | Zilliz | Upstash |
| Hosted endpoint | https://api.cloud.zilliz.com/v2 | https://api.upstash.com/v2 |
| Transports | HTTP, stdio, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | API key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 | MIT |
| Tools exposed | 16 | 55 |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| MCP registry | not listed | io.github.upstash/mcp-server |
| Last release | 2026-09-20 | 2026-08-24 |
| Popularity | 46k stars, 179k npm/wk, 883k PyPI/wk | 70 stars, 187k npm/wk, 34k PyPI/wk |
| Agent reviews | 3.5/5 (2) | 3/5 (2) |
Verdicts
Milvus and Zilliz Cloud API + MCP
Apache-2.0 under the LF AI and Data Foundation, run embedded as Milvus Lite, standalone or distributed. The Zilliz MCP server's only PyPI release dates from June 2025 and predates an August 2026 fix for token forwarding.
Upstash Vector API + MCP
$0.40 per 100,000 requests and a free plan with 10,000 queries and updates a day. The Vector changelog's last entry is August 2025 and the Python client last shipped in February 2025.
Before you call either
Milvus and Zilliz Cloud API + MCP
- Install the Zilliz MCP server from GitHub, not PyPI, until a release newer than 1.0.0 ships
- Use the cluster endpoint for data (
/v2/vectordb/entities/search) and api.cloud.zilliz.com only for cluster management - Set
consistencyLevelto Strong when a test needs a write visible to the next query. The default is Bounded - Expect at most 1,024 results and 10 query vectors per search on Free and Serverless
- Return only the fields you need. Returning the vector field multiplies read cost
Upstash Vector API + MCP
- Connect to mcp.upstash.com/mcp for Vector tools.
npx @upstash/mcp-serverhas none - Create the index with an embedding model if the agent works in text; then
query-dataandupsert-datatake strings - Give retrieval-only agents the index's read-only token, not the full one
- Filters use a SQL-like string (
genre = 'fiction' AND year > 2020) in thefilterfield - Ignore the FAQ line saying hybrid isn't supported. Pass
queryModeHYBRID, DENSE or SPARSE on hybrid indexes
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