# 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. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/milvus-zilliz-vs-upstash-vector
- Markdown: https://www.anchorterminal.com/compare/milvus-zilliz-vs-upstash-vector.md (~1,750 tokens)
- Slim: https://www.anchorterminal.com/compare/milvus-zilliz-vs-upstash-vector.min.md (~380 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/milvus-zilliz-vs-upstash-vector.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-04

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 + MCP: grade C, 57.5/100, rank #293 of 452. Markdown https://www.anchorterminal.com/tools/milvus-zilliz.md · JSON https://www.anchorterminal.com/api/v1/tools/milvus-zilliz.json
- Upstash Vector API + MCP: grade B, 62.4/100, rank #218 of 452. Markdown https://www.anchorterminal.com/tools/upstash-vector.md · JSON https://www.anchorterminal.com/api/v1/tools/upstash-vector.json

## 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 | Milvus and Zilliz Cloud API + MCP | Upstash Vector API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 85 | 75 | Milvus and Zilliz Cloud API + MCP +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 69 | 49 | Milvus and Zilliz Cloud API + MCP +20 |
| Agent ergonomics | 13% (16.2 this run) | 62 | 75 | Upstash Vector API + MCP +13 |
| Security & auth | 14% (17.5 this run) | 53 | 63 | Upstash Vector API + MCP +10 |
| Payments & pricing | 10% (12.5 this run) | 35 | 40 | Upstash Vector API + MCP +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 85 | 46 | Milvus and Zilliz Cloud API + MCP +39 |
| Transparency & trust | 7% (8.8 this run) | 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

1. Install the Zilliz MCP server from GitHub, not PyPI, until a release newer than 1.0.0 ships
2. Use the cluster endpoint for data (`/v2/vectordb/entities/search`) and api.cloud.zilliz.com only for cluster management
3. Set `consistencyLevel` to Strong when a test needs a write visible to the next query. The default is Bounded
4. Expect at most 1,024 results and 10 query vectors per search on Free and Serverless
5. Return only the fields you need. Returning the vector field multiplies read cost

### Upstash Vector API + MCP

1. Connect to mcp.upstash.com/mcp for Vector tools. `npx @upstash/mcp-server` has none
2. Create the index with an embedding model if the agent works in text; then `query-data` and `upsert-data` take strings
3. Give retrieval-only agents the index's read-only token, not the full one
4. Filters use a SQL-like string (`genre = 'fiction' AND year > 2020`) in the `filter` field
5. Ignore the FAQ line saying hybrid isn't supported. Pass `queryMode` HYBRID, DENSE or SPARSE on hybrid indexes

## Other comparisons with Milvus and Zilliz Cloud API + MCP or Upstash Vector API + MCP

- [Chroma API + MCP vs Milvus and Zilliz Cloud API + MCP](https://www.anchorterminal.com/compare/chroma-vs-milvus-zilliz.md)
- [Chroma API + MCP vs Upstash Vector API + MCP](https://www.anchorterminal.com/compare/chroma-vs-upstash-vector.md)
- [Epsilla Vector Database vs Milvus and Zilliz Cloud API + MCP](https://www.anchorterminal.com/compare/epsilla-vs-milvus-zilliz.md)
- [Epsilla Vector Database vs Upstash Vector API + MCP](https://www.anchorterminal.com/compare/epsilla-vs-upstash-vector.md)
- [LanceDB vs Milvus and Zilliz Cloud API + MCP](https://www.anchorterminal.com/compare/lancedb-vs-milvus-zilliz.md)
- [LanceDB vs Upstash Vector API + MCP](https://www.anchorterminal.com/compare/lancedb-vs-upstash-vector.md)
- [Milvus and Zilliz Cloud API + MCP vs Pinecone API + MCP](https://www.anchorterminal.com/compare/milvus-zilliz-vs-pinecone.md)
- [Milvus and Zilliz Cloud API + MCP vs Qdrant API + MCP](https://www.anchorterminal.com/compare/milvus-zilliz-vs-qdrant.md)
- [Milvus and Zilliz Cloud API + MCP vs Typesense API + MCP](https://www.anchorterminal.com/compare/milvus-zilliz-vs-typesense.md)
- [Milvus and Zilliz Cloud API + MCP vs Weaviate API + MCP](https://www.anchorterminal.com/compare/milvus-zilliz-vs-weaviate.md)
- [Pinecone API + MCP vs Upstash Vector API + MCP](https://www.anchorterminal.com/compare/pinecone-vs-upstash-vector.md)
- [Qdrant API + MCP vs Upstash Vector API + MCP](https://www.anchorterminal.com/compare/qdrant-vs-upstash-vector.md)
- [Typesense API + MCP vs Upstash Vector API + MCP](https://www.anchorterminal.com/compare/typesense-vs-upstash-vector.md)
- [Upstash Vector API + MCP vs Weaviate API + MCP](https://www.anchorterminal.com/compare/upstash-vector-vs-weaviate.md)