Delta Lake

Delta Lake is a graduated project of the Linux Foundation AI & Data Foundation providing an open source storage framework for building Lakehouse architectures. Originally contributed by Databricks, it adds reliability, quality, and performance to data lakes with ACID transactions, schema enforcement, time travel, and Iceberg/Hudi interoperability via UniForm. Delta Lake projects also include Delta Sharing (an open protocol for secure data sharing) and catalog-managed tables built on the Iceberg REST Catalog protocol.

Delta Lake publishes 5 API contracts indexed on the APIs.io network, including Schemas API, Shares API, Tables API, and 2 more. Tagged areas include Data, Data Lake, Lakehouse, Linux Foundation, and Open Source.

The Delta Lake catalog on APIs.io includes 1 Spectral governance ruleset.

Delta Lake’s developer surface includes authentication, documentation, engineering blog, changelog, sandbox, API reference, getting-started guide, and 30 more developer resources.

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48.1/100 developing ▬ flat Agent 32/100 agent ready Front door AI 2/6 trace Heartbeat 56/100 slowing self hosted · Apache-2.0 Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessOpen

1 published contract 3 Agent Skills

Data Data Lake Lakehouse Linux Foundation Open Source Storage Streaming

Kin Score

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

Composite quality — 48.1/100 · developing

Contract Quality 8.5 / 19

Developer Ergonomics 9.6 / 15

Access Clarity 3.2 / 15

Operational Transparency 3.3 / 10

Contract Governance 4.1 / 9

Discoverability 4.8 / 8

Regulatory Posture 3.7 / 15

Open Source Surface 6.5 / 10

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 75 points between them, because both conditional facets apply and carry 25 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

6 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 21.1 — up to +15.8 composite points
Contract Quality scores 45.5 — up to +13.6 composite points
Operational Transparency scores 34.2 — up to +8.6 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/delta-lake/apis.yml: open an issue on github.com/api-evangelist/delta-lake 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 →

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 5

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

Delta Lake Storage Framework

The Delta Lake storage framework defines the on-disk transaction log and protocol that adds ACID transactions, schema enforcement, and time travel to Parquet-based data lakes. D...

Delta Catalog-Managed Tables

Catalog-managed Delta tables delegate table scan planning to an external catalog using the Iceberg REST Catalog protocol, enabling interoperability with Unity Catalog and other ...

Delta Lake Schemas API

Schema discovery APIs

Delta Lake Shares API

Share discovery APIs

Delta Lake Tables API

Table query and inspection APIs

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

delta-lake-discover-shared-data

AGENT SKILL

delta-lake-read-change-data-feed

AGENT SKILL

delta-lake-read-shared-table

AGENT SKILL

Delta Lake API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

Delta Lake Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Delta Lake Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Delta Lake Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Delta Lake API Rules

58 rules · 56 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Delta Lake Delta Sharing Protocol Overlay

9 actions · update

DERIVED

Security Posture 2

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

Delta Lake Authentication

http · 1 scheme

SECURITY

Delta Lake Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Sandbox

Sandbox

GettingStarted

GettingStarted

Documentation 3

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Vocabulary

Conformance

Lifecycle

ErrorCatalog

Conventions

Idempotency

DataModel

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

GitHubOrg

Packages

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 7

Status, limits, changes, and where to get help

RateLimits

IssueTracker

Slack

Deprecation

ChangeLog

Support

Roadmap

Scroll for all 7

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

License

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Overlay

Overlay

LinuxFoundation

LinuxFoundation

Source (apis.yml)

aid: delta-lake
name: Delta Lake
description: Delta Lake is a graduated project of the Linux Foundation AI & Data Foundation providing an open source storage
  framework for building Lakehouse architectures. Originally contributed by Databricks, it adds reliability, quality, and
  performance to data lakes with ACID transactions, schema enforcement, time travel, and Iceberg/Hudi interoperability via
  UniForm. Delta Lake projects also include Delta Sharing (an open protocol for secure data sharing) and catalog-managed tables
  built on the Iceberg REST Catalog protocol.
type: Index
deliveryModel:
  model: self-hosted
  license: Apache-2.0
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: medium
  source:
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/delta-lake.png
tags:
- Data
- Data Lake
- Lakehouse
- Linux Foundation
- Open Source
- Storage
- Streaming
tags_raw:
- Data
- Data Lake
- Lakehouse
- Linux Foundation
- Open Source
- Storage
- Streaming
- Open-Source
created: '2026-03-16'
modified: '2026-09-05'
url: https://raw.githubusercontent.com/api-evangelist/delta-lake/refs/heads/main/apis.yml
specificationVersion: '0.23'
kind: opensource
apis:
- aid: delta-lake:delta-lake-storage
  name: Delta Lake Storage Framework
  description: The Delta Lake storage framework defines the on-disk transaction log and protocol that adds ACID transactions,
    schema enforcement, and time travel to Parquet-based data lakes. Delta Lake exposes Spark, Rust, and Python APIs (delta-spark,
    delta-rs, deltalake) rather than a network API.
  humanURL: https://docs.delta.io/
  tags:
  - Lakehouse
  - Protocol
  - Storage
  - Transaction Log
  properties:
  - type: Documentation
    url: https://docs.delta.io/
  - type: Protocol
    url: https://github.com/delta-io/delta/blob/master/PROTOCOL.md
  - type: SourceCode
    url: https://github.com/delta-io/delta
  - type: ReleaseNotes
    url: https://github.com/delta-io/delta/releases
  - type: APIReference
    url: https://docs.delta.io/delta-apidoc/
  - type: Protobuf
    name: Delta Connect (base)
    url: grpc/delta-lake-delta-connect-base.proto
  - type: Protobuf
    name: Delta Connect (commands)
    url: grpc/delta-lake-delta-connect-commands.proto
  - type: Protobuf
    name: Delta Connect (relations)
    url: grpc/delta-lake-delta-connect-relations.proto
  - type: LLMsTxt
    url: llms/delta-lake-llms.txt
- aid: delta-lake:delta-catalog
  name: Delta Catalog-Managed Tables
  description: Catalog-managed Delta tables delegate table scan planning to an external catalog using the Iceberg REST Catalog
    protocol, enabling interoperability with Unity Catalog and other catalog services.
  humanURL: https://delta.io/blog/2026-02-02-delta-catalog-managed-tables/
  tags:
  - Catalog
  - Iceberg REST
  - Interoperability
  properties:
  - type: Documentation
    url: https://delta.io/blog/2026-02-02-delta-catalog-managed-tables/
  - type: Protocol
    url: https://github.com/delta-io/delta/blob/master/PROTOCOL.md
- aid: delta-lake:delta-lake-schemas-api
  name: Delta Lake Schemas API
  description: Schema discovery APIs
  humanURL: https://docs.delta.io/
  baseURL: https://sharing.delta.io/delta-sharing/
  tags:
  - Schema
  tags_raw:
  - schemas
  properties:
  - type: OpenAPI
    url: openapi/delta-lake-schemas-api-openapi.yml
  - type: Documentation
    url: https://github.com/delta-io/delta-sharing
  - type: Protocol
    url: https://github.com/delta-io/delta-sharing/blob/main/PROTOCOL.md
  - type: SourceCode
    url: https://github.com/delta-io/delta-sharing
  - type: Protobuf
    url: grpc/delta-lake-delta-sharing-protocol.proto
  - type: X-MCPServerCandidate
    url: mcp/delta-lake-mcp.yml
  - type: ReleaseNotes
    url: https://github.com/delta-io/delta-sharing/releases
- aid: delta-lake:delta-lake-shares-api
  name: Delta Lake Shares API
  description: Share discovery APIs
  humanURL: https://docs.delta.io/
  baseURL: https://sharing.delta.io/delta-sharing/
  tags:
  - Share
  tags_raw:
  - shares
  properties:
  - type: OpenAPI
    url: openapi/delta-lake-shares-api-openapi.yml
  - type: Documentation
    url: https://github.com/delta-io/delta-sharing
  - type: Protocol
    url: https://github.com/delta-io/delta-sharing/blob/main/PROTOCOL.md
  - type: SourceCode
    url: https://github.com/delta-io/delta-sharing
  - type: Protobuf
    url: grpc/delta-lake-delta-sharing-protocol.proto
  - type: X-MCPServerCandidate
    url: mcp/delta-lake-mcp.yml
  - type: ReleaseNotes
    url: https://github.com/delta-io/delta-sharing/releases
- aid: delta-lake:delta-lake-tables-api
  name: Delta Lake Tables API
  description: Table query and inspection APIs
  humanURL: https://docs.delta.io/
  baseURL: https://sharing.delta.io/delta-sharing/
  tags:
  - Tables
  tags_raw:
  - tables
  properties:
  - type: OpenAPI
    url: openapi/delta-lake-tables-api-openapi.yml
  - type: Documentation
    url: https://github.com/delta-io/delta-sharing
  - type: Protocol
    url: https://github.com/delta-io/delta-sharing/blob/main/PROTOCOL.md
  - type: SourceCode
    url: https://github.com/delta-io/delta-sharing
  - type: Protobuf
    url: grpc/delta-lake-delta-sharing-protocol.proto
  - type: X-MCPServerCandidate
    url: mcp/delta-lake-mcp.yml
  - type: ReleaseNotes
    url: https://github.com/delta-io/delta-sharing/releases
common:
- type: Plans
  url: plans/delta-lake-plans-pricing.yml
- type: RateLimits
  url: rate-limits/delta-lake-rate-limits.yml
- type: FinOps
  url: finops/delta-lake-finops.yml
- type: Overlay
  url: overlays/delta-lake-delta-sharing-protocol-overlay.yaml
- type: Authentication
  url: authentication/delta-lake-authentication.yml
- type: IssueTracker
  url: https://github.com/delta-io/delta/issues
- type: CodeOfConduct
  url: https://github.com/delta-io/delta/blob/master/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/delta-io/delta/blob/master/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/delta-io/delta/blob/master/LICENSE.txt
- type: DomainSecurity
  url: security/delta-lake-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/deltalake
- type: Website
  url: https://delta.io/
- type: Documentation
  url: https://docs.delta.io/
- type: GitHubOrg
  url: https://github.com/delta-io
- type: Blog
  url: https://delta.io/blog/
- type: LinuxFoundation
  url: https://lfaidata.foundation/projects/delta-lake/
- type: Slack
  url: https://go.delta.io/slack
- type: Vocabulary
  url: vocabulary/delta-lake-vocabulary.yml
- type: Integrations
  url: https://delta.io/integrations/
- type: Packages
  url: packages/delta-lake-packages.yml
- type: SDKs
  url: packages/delta-lake-packages.yml
- type: LLMsTxt
  url: llms/delta-lake-llms.txt
- type: Conformance
  url: conformance/delta-lake-conformance.yml
- type: Lifecycle
  url: lifecycle/delta-lake-lifecycle.yml
- type: Deprecation
  url: lifecycle/delta-lake-lifecycle.yml
- type: ChangeLog
  url: changelog/delta-lake-changelog.yml
- type: ErrorCatalog
  url: errors/delta-lake-problem-types.yml
- type: Conventions
  url: conventions/delta-lake-conventions.yml
- type: Idempotency
  url: conventions/delta-lake-conventions.yml
- type: DataModel
  url: data-model/delta-lake-data-model.yml
- type: Sandbox
  url: sandbox/delta-lake-sandbox.yml
- type: AgentSkill
  url: skills/_index.yml
- type: APIReference
  url: https://docs.delta.io/delta-apidoc/
- type: GettingStarted
  url: https://delta.io/learn/getting-started
- type: Support
  url: https://delta.io/resources/getting-help
- type: Roadmap
  url: https://delta.io/roadmap
- type: TermsOfService
  url: https://lfprojects.org/policies/terms-of-use/
- type: PrivacyPolicy
  url: https://lfprojects.org/policies/privacy-policy/
integrations:
- name: The Linux Foundation Projects
- name: Delta Lake
- name: logo
- name: UniForm
- name: The Linux Foundation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-09-05'
  status: enriched
  artifacts_added: 22
  pass: local-v3

Delta Lake API — frequently asked questions

Does Delta Lake have an API?

Yes. APIs.io lists 5 APIs from Delta Lake, including Delta Lake Storage Framework, Delta Catalog-Managed Tables and Delta Lake Schemas API, and 2 more.

Is there an OpenAPI specification for the Delta Lake API?

Yes. APIs.io indexes 3 OpenAPI specifications for Delta Lake, each linked for download from this page.

How do I authenticate with the Delta Lake API?

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

Is the Delta Lake API ready for AI agents?

Delta Lake has a Kin Score of 48.1 out of 100 (developing) and an Agent Readiness score of 31.8 (agent-ready), scored by API Evangelist on 2026-11-06.

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