Milvus

Milvus is an Apache 2.0 open-source vector database. It exposes a versioned REST API alongside gRPC and language SDKs (Python, Go, Java, Node.js). Maintained by Zilliz; LF AI & Data Foundation graduated project.

Milvus publishes 8 API contracts indexed on the APIs.io network, including Collections API, Entities API, Indexes API, and 5 more. Tagged areas include Vector Search, Artificial Intelligence, Embeddings, Open Source, and Cloud-Native.

The Milvus catalog on APIs.io includes 1 Spectral governance ruleset.

Milvus’ developer surface includes authentication, developer portal, engineering blog, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

40.1/100 developing ▬ flat Agent 20/100 agent aware Front door AI 6/6 dominant open core · Apache-2.0 Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessEnterprise

1 published contract

Vector Search Artificial Intelligence Embeddings Open Source Cloud-Native Database

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Cybersecurity Management

BC-620

RolesUsers

POST /v2/vectordb/roles/create POST /v2/vectordb/users/create

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 40.1/100 · developing

Contract Quality 6.6 / 16

Developer Ergonomics 6.3 / 13

Access Clarity 0.7 / 13

Operational Transparency 2.2 / 8

Contract Governance 1.1 / 8

Discoverability 4.8 / 7

Regulatory Posture 1.6 / 15

Open Source Surface 6.5 / 10

Create-or-Update Ergonomics 5.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 65 points between them, because both conditional facets apply and carry 35 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 65% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 5.3 — up to +18.9 composite points
Contract Quality scores 40.4 — up to +14.9 composite points
Contract Governance scores 13.6 — up to +10.4 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/milvus/apis.yml: open an issue on github.com/api-evangelist/milvus to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Retrieval, Vector and RAG	standard	48.2	-	-
Data Integration (ELT connectors and data governance)	standard	48.2	-	-
OpenSSF Best Practices Badge Holders	standard	48.2	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 8

Individual APIs this provider publishes, each with its own machine-readable definition.

Milvus REST API v2

Milvus v2 REST API covers collections, partitions, vectors, search, query, indexes, and role/RBAC management. Authentication: Bearer token formed from `username:password` when a...

Milvus gRPC API

gRPC is the canonical, high-throughput interface to Milvus. The official SDKs are gRPC-based; the REST API is a thin wrapper for non-Go/Python/Java clients.

Milvus Collections API

The Collections API from Milvus — 11 operation(s) for collections.

Milvus Entities API

The Entities API from Milvus — 7 operation(s) for entities.

Milvus Indexes API

The Indexes API from Milvus — 4 operation(s) for indexes.

Milvus Partitions API

The Partitions API from Milvus — 3 operation(s) for partitions.

Milvus Roles API

The Roles API from Milvus — 2 operation(s) for roles.

Milvus Users API

The Users API from Milvus — 2 operation(s) for users.

Scroll for all 8

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Milvus REST Collections API

OPEN COLLECTION

Milvus REST Collections Entities API

OPEN COLLECTION

Milvus REST Collections Indexes API

OPEN COLLECTION

Milvus REST Collections Partitions API

OPEN COLLECTION

Milvus REST Collections Roles API

OPEN COLLECTION

Milvus REST Collections Users API

OPEN COLLECTION

Milvus REST API

OPEN COLLECTION

Scroll for all 7

Milvus API pricing

Not yet checked against Milvus's own pricing page. Compiled by API Evangelist on 2026-05-08 from milvus.io/; confirm before you rely on a figure.

Plan	Price
To Be Reconciled enterprise	—

Plan details, limits and sources →

Rate limits

Default: see provider documentation varies

Compiled by API Evangelist, not yet checked against Milvus's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Milvus Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Milvus Rate Limits

1 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Milvus

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Milvus Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Milvus API Rules

54 rules · 51 errors 2 warnings 1 info

SPECTRAL

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Milvus Authentication

http · 1 scheme

SECURITY

Milvus Domain Security

TLSv1.3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Milvus Agentic Access

29 operations · 19 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Documentation 1

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 2

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

SourceCode

SourceCode

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

Releases

Releases

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

License

License

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

LF AI & Data

Foundation

Zilliz Cloud

CommercialOffering

Source (apis.yml)

aid: milvus
url: https://raw.githubusercontent.com/api-evangelist/milvus/refs/heads/main/apis.yml
name: Milvus
kind: opensource
description: Milvus is an Apache 2.0 open-source vector database. It exposes a versioned REST API alongside gRPC and language
  SDKs (Python, Go, Java, Node.js). Maintained by Zilliz; LF AI & Data Foundation graduated project.
deliveryModel:
  model: open-core
  license: Apache-2.0
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: enterprise
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Enterprise
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/milvus.png
tags:
- Vector Search
- Artificial Intelligence
- Embeddings
- Open Source
- Cloud-Native
- Database
tags_raw:
- Vector Database
- AI
- Embeddings
- Open Source
- Cloud-Native
- Open-Source
- Database
- Vector Search
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.23'
apis:
- aid: milvus:milvus-rest-api-v2
  name: Milvus REST API v2
  humanURL: https://milvus.io/api-reference/restful/v2.5.x/About.md
  baseURL: http://{milvus_host}:19530/v2/vectordb
  tags:
  - REST
  - Collection
  - Vectors
  - Index
  - Partitions
  tags_raw:
  - REST
  - Collections
  - Vectors
  - Index
  - Partitions
  description: 'Milvus v2 REST API covers collections, partitions, vectors, search, query, indexes, and role/RBAC management.
    Authentication: Bearer token formed from `username:password` when auth is enabled (off by default in self-hosted dev).'
  properties:
  - type: Documentation
    url: https://milvus.io/api-reference/restful/v2.5.x/About.md
  - type: Authentication
    url: https://milvus.io/api-reference/restful/v2.5.x/About.md
  - type: SDKs
    title: Python (pymilvus)
    url: https://github.com/milvus-io/pymilvus
  - type: SDKs
    title: Go (milvus-sdk-go)
    url: https://github.com/milvus-io/milvus-sdk-go
  - type: SDKs
    title: Java (milvus-sdk-java)
    url: https://github.com/milvus-io/milvus-sdk-java
  - type: SDKs
    title: Node.js (milvus-sdk-node)
    url: https://github.com/milvus-io/milvus-sdk-node
- aid: milvus:milvus-grpc
  name: Milvus gRPC API
  humanURL: https://milvus.io/docs/grpc.md
  baseURL: grpc://{milvus_host}:19530
  tags:
  - gRPC
  - High Throughput
  description: gRPC is the canonical, high-throughput interface to Milvus. The official SDKs are gRPC-based; the REST API
    is a thin wrapper for non-Go/Python/Java clients.
  properties:
  - type: Documentation
    url: https://milvus.io/docs/
- aid: milvus:milvus-collections-api
  name: Milvus Collections API
  description: The Collections API from Milvus — 11 operation(s) for collections.
  humanURL: https://milvus.io/api-reference/restful/v2.5.x/About.md
  baseURL: http://{milvus_host}:19530/v2/vectordb
  tags:
  - Collection
  tags_raw:
  - Collections
  properties:
  - type: OpenAPI
    url: openapi/milvus-collections-api-openapi.yml
- aid: milvus:milvus-entities-api
  name: Milvus Entities API
  description: The Entities API from Milvus — 7 operation(s) for entities.
  humanURL: https://milvus.io/api-reference/restful/v2.5.x/About.md
  baseURL: http://{milvus_host}:19530/v2/vectordb
  tags:
  - Entities
  properties:
  - type: OpenAPI
    url: openapi/milvus-entities-api-openapi.yml
- aid: milvus:milvus-indexes-api
  name: Milvus Indexes API
  description: The Indexes API from Milvus — 4 operation(s) for indexes.
  humanURL: https://milvus.io/api-reference/restful/v2.5.x/About.md
  baseURL: http://{milvus_host}:19530/v2/vectordb
  tags:
  - Index
  tags_raw:
  - Indexes
  properties:
  - type: OpenAPI
    url: openapi/milvus-indexes-api-openapi.yml
- aid: milvus:milvus-partitions-api
  name: Milvus Partitions API
  description: The Partitions API from Milvus — 3 operation(s) for partitions.
  humanURL: https://milvus.io/api-reference/restful/v2.5.x/About.md
  baseURL: http://{milvus_host}:19530/v2/vectordb
  tags:
  - Partitions
  properties:
  - type: OpenAPI
    url: openapi/milvus-partitions-api-openapi.yml
- aid: milvus:milvus-roles-api
  name: Milvus Roles API
  description: The Roles API from Milvus — 2 operation(s) for roles.
  humanURL: https://milvus.io/api-reference/restful/v2.5.x/About.md
  baseURL: http://{milvus_host}:19530/v2/vectordb
  tags:
  - Roles
  properties:
  - type: OpenAPI
    url: openapi/milvus-roles-api-openapi.yml
- aid: milvus:milvus-users-api
  name: Milvus Users API
  description: The Users API from Milvus — 2 operation(s) for users.
  humanURL: https://milvus.io/api-reference/restful/v2.5.x/About.md
  baseURL: http://{milvus_host}:19530/v2/vectordb
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/milvus-users-api-openapi.yml
common:
- type: CapabilityMap
  url: capabilities/milvus-capability-edges.yml
  name: Milvus Business Capability Map
- type: IssueTracker
  url: https://github.com/milvus-io/milvus/issues
- type: Releases
  url: https://github.com/milvus-io/milvus/releases
- type: CodeOfConduct
  url: https://github.com/milvus-io/milvus/blob/master/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/milvus-io/milvus/blob/master/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/milvus-io/milvus/blob/master/LICENSE
- type: AgenticAccess
  url: agentic-access/milvus-agentic-access.yml
- type: DomainSecurity
  url: security/milvus-domain-security.yml
- type: Authentication
  url: authentication/milvus-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/the-milvus-project
- type: Website
  url: https://milvus.io/
- type: Portal
  url: https://milvus.io/docs/
- type: SourceCode
  url: https://github.com/milvus-io/milvus
- type: Foundation
  title: LF AI & Data
  url: https://lfaidata.foundation/projects/milvus/
- type: CommercialOffering
  title: Zilliz Cloud
  url: https://zilliz.com/
- type: Plans
  url: plans/milvus-plans-pricing.yml
- type: RateLimits
  url: rate-limits/milvus-rate-limits.yml
- type: FinOps
  url: finops/milvus-finops.yml
- type: LlmsText
  url: https://milvus.io/llms.txt
- type: Blog
  url: https://milvus.io/blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Milvus API — frequently asked questions

Does Milvus have an API?

Yes. APIs.io lists 8 APIs from Milvus, including Milvus REST API v2, Milvus gRPC API and Milvus Collections API, and 5 more.

Is there an OpenAPI specification for the Milvus API?

Yes. APIs.io indexes 6 OpenAPI specifications for Milvus, each linked for download from this page.

How do I authenticate with the Milvus API?

Milvus uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Milvus Authentication.

How much does the Milvus API cost?

APIs.io lists 1 pricing plan for Milvus, with each plan's price, limits and inclusions under Pricing on this page.

Is the Milvus API ready for AI agents?

Milvus has a Kin Score of 40.1 out of 100 (developing) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

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Tools for providers

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get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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