Table Format

Open Table Format is a category of open standards for organizing and managing data in data lakehouses. The three dominant formats are Apache Iceberg (the emerging industry standard with snapshot-based metadata and broad engine support), Delta Lake (Databricks-originated, transaction-log-based), and Apache Hudi (upsert-optimized with Copy-on-Write and Merge-on-Read modes). These formats bring ACID transactions, schema evolution, time travel, and efficient query planning to data lake storage. Apache Iceberg defines a REST Catalog API (OpenAPI spec) that enables standardized catalog operations across implementations like Polaris, Nessie, AWS Glue, and Google BigLake.

Table Format publishes 6 APIs on the APIs.io network, including Commits API, Configuration API, Namespaces API, and 3 more. Tagged areas include Data Lakehouse, Open Table Format, Apache Iceberg, Delta Lake, and Apache Hudi.

The Table Format catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Table Format’s developer surface includes authentication, engineering blog, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.9/100 developing ▼ -5.1 Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemiumSelf serve⚡ Free to try

8 APIs

Data LakehouseOpen Table FormatApache IcebergDelta LakeApache HudiData LakeACID TransactionsSchema EvolutionTime Travel

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 44.9/100 · developing

Contract Quality 15.5 / 25

Developer Ergonomics 2.6 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.1 / 13

Governance 8.3 / 12

Discoverability 6.5 / 10

Agent readiness — 31/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/table-format: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 8

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

Rate Limits 1

Documented rate limits and quota policies.

Table Format Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Examples 2

Example request and response payloads for these APIs.

Scopes 1

OAuth scopes governing access to this provider's APIs.

Table Format Scopes

1 scope · clientCredentials

1 scopes

SCOPES

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Vocabulary

Vocabulary

Build 3

SDKs, sample code, and the tooling you integrate with

Apache Iceberg GitHub

Apache Iceberg GitHub

Delta Lake GitHub

Delta Lake GitHub

Apache Hudi GitHub

Apache Hudi GitHub

Access & Security 4

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Company 1

The organization behind the API

Blog

Blog

Other 5

Properties that don't map to a standard resource type

Wikipedia

Apache Iceberg

Delta Lake

Apache Hudi

Unity Catalog

Source (apis.yml)

aid: table-format
name: Table Format
description: Open Table Format is a category of open standards for organizing and managing data in data lakehouses. The three
  dominant formats are Apache Iceberg (the emerging industry standard with snapshot-based metadata and broad engine support),
  Delta Lake (Databricks-originated, transaction-log-based), and Apache Hudi (upsert-optimized with Copy-on-Write and Merge-on-Read
  modes). These formats bring ACID transactions, schema evolution, time travel, and efficient query planning to data lake
  storage. Apache Iceberg defines a REST Catalog API (OpenAPI spec) that enables standardized catalog operations across implementations
  like Polaris, Nessie, AWS Glue, and Google BigLake.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/table-format.png
tags:
- Data Lakehouse
- Open Table Format
- Apache Iceberg
- Delta Lake
- Apache Hudi
- Data Lake
- ACID Transactions
- Schema Evolution
- Time Travel
url: https://raw.githubusercontent.com/api-evangelist/table-format/refs/heads/main/apis.yml
created: '2025'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: table-format:delta-lake
  name: Delta Lake
  description: Delta Lake is an open-source storage framework developed by Databricks that adds reliability, performance,
    and ACID compliance to data lakes. It uses a transaction log (delta log) to record all changes to data. Delta Lake is
    deeply integrated with Apache Spark and supports batch and streaming workloads, schema enforcement, time travel, and MERGE
    operations.
  humanURL: https://delta.io/
  tags:
  - Delta Lake
  - Data Lake
  - ACID Transactions
  - Apache Spark
  - Databricks
  properties:
  - type: Documentation
    url: https://docs.delta.io/
  - type: GitHub
    url: https://github.com/delta-io/delta
- aid: table-format:apache-hudi
  name: Apache Hudi
  description: Apache Hudi (Hadoop Upserts Deletes and Incrementals) is an open-source data lakehouse platform optimized for
    upserts, deletes, and incremental data processing. It supports Copy-on-Write (COW) and Merge-on-Read (MOR) table types
    and is used for CDC-based data pipelines and streaming analytics.
  humanURL: https://hudi.apache.org/
  tags:
  - Apache Hudi
  - Data Lake
  - CDC
  - Incremental Processing
  properties:
  - type: Documentation
    url: https://hudi.apache.org/docs/overview/
  - type: GitHub
    url: https://github.com/apache/hudi
- aid: table-format:table-format-commits-api
  name: Table Format Commits API
  description: Transaction commits and metadata updates
  humanURL: https://iceberg.apache.org/rest-catalog-spec/
  baseURL: https://catalog-service/
  tags:
  - Commits
  properties:
  - type: OpenAPI
    url: openapi/table-format-commits-api-openapi.yml
  - type: Documentation
    url: https://iceberg.apache.org/rest-catalog-spec/
  - type: GitHub
    url: https://github.com/apache/iceberg
  - type: Documentation
    url: https://www.unitycatalog.io/
  - type: GitHub
    url: https://github.com/unitycatalog/unitycatalog
- aid: table-format:table-format-configuration-api
  name: Table Format Configuration API
  description: Catalog configuration and discovery
  humanURL: https://iceberg.apache.org/rest-catalog-spec/
  baseURL: https://catalog-service/
  tags:
  - Configuration
  properties:
  - type: OpenAPI
    url: openapi/table-format-configuration-api-openapi.yml
  - type: Documentation
    url: https://iceberg.apache.org/rest-catalog-spec/
  - type: GitHub
    url: https://github.com/apache/iceberg
  - type: Documentation
    url: https://www.unitycatalog.io/
  - type: GitHub
    url: https://github.com/unitycatalog/unitycatalog
- aid: table-format:table-format-namespaces-api
  name: Table Format Namespaces API
  description: Namespace (database/schema) management
  humanURL: https://iceberg.apache.org/rest-catalog-spec/
  baseURL: https://catalog-service/
  tags:
  - Namespaces
  properties:
  - type: OpenAPI
    url: openapi/table-format-namespaces-api-openapi.yml
  - type: Documentation
    url: https://iceberg.apache.org/rest-catalog-spec/
  - type: GitHub
    url: https://github.com/apache/iceberg
  - type: Documentation
    url: https://www.unitycatalog.io/
  - type: GitHub
    url: https://github.com/unitycatalog/unitycatalog
- aid: table-format:table-format-oauth2-api
  name: Table Format OAuth2 API
  description: OAuth2 token management
  humanURL: https://iceberg.apache.org/rest-catalog-spec/
  baseURL: https://catalog-service/
  tags:
  - OAuth2
  properties:
  - type: OpenAPI
    url: openapi/table-format-oauth2-api-openapi.yml
  - type: Documentation
    url: https://iceberg.apache.org/rest-catalog-spec/
  - type: GitHub
    url: https://github.com/apache/iceberg
  - type: Documentation
    url: https://www.unitycatalog.io/
  - type: GitHub
    url: https://github.com/unitycatalog/unitycatalog
- aid: table-format:table-format-tables-api
  name: Table Format Tables API
  description: Table creation, listing, loading, and management
  humanURL: https://iceberg.apache.org/rest-catalog-spec/
  baseURL: https://catalog-service/
  tags:
  - Tables
  properties:
  - type: OpenAPI
    url: openapi/table-format-tables-api-openapi.yml
  - type: Documentation
    url: https://iceberg.apache.org/rest-catalog-spec/
  - type: GitHub
    url: https://github.com/apache/iceberg
  - type: Documentation
    url: https://www.unitycatalog.io/
  - type: GitHub
    url: https://github.com/unitycatalog/unitycatalog
- aid: table-format:table-format-views-api
  name: Table Format Views API
  description: View lifecycle management
  humanURL: https://iceberg.apache.org/rest-catalog-spec/
  baseURL: https://catalog-service/
  tags:
  - Views
  properties:
  - type: OpenAPI
    url: openapi/table-format-views-api-openapi.yml
  - type: Documentation
    url: https://iceberg.apache.org/rest-catalog-spec/
  - type: GitHub
    url: https://github.com/apache/iceberg
  - type: Documentation
    url: https://www.unitycatalog.io/
  - type: GitHub
    url: https://github.com/unitycatalog/unitycatalog
common:
- type: AgenticAccess
  url: agentic-access/table-format-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/table-format-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/table-format-domain-security.yml
- type: Authentication
  url: authentication/table-format-authentication.yml
- type: OAuthScopes
  url: scopes/table-format-scopes.yml
- type: Wikipedia
  url: https://en.wikipedia.org/wiki/Apache_Iceberg
- type: Apache Iceberg
  url: https://iceberg.apache.org/
- type: Delta Lake
  url: https://delta.io/
- type: Apache Hudi
  url: https://hudi.apache.org/
- type: Unity Catalog
  url: https://www.unitycatalog.io/
- type: Apache Iceberg GitHub
  url: https://github.com/apache/iceberg
- type: Delta Lake GitHub
  url: https://github.com/delta-io/delta
- type: Apache Hudi GitHub
  url: https://github.com/apache/hudi
- type: Vocabulary
  url: https://raw.githubusercontent.com/api-evangelist/table-format/refs/heads/main/vocabulary/table-format-vocabulary.yml
- url: https://iceberg.apache.org/feed_rss_updated.xml
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Table Format

APIs 8

Open Collections 1

Pricing Plans 1