Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 36 Complete, well-documented, and agent-ready

Strong 36 Solid coverage with minor gaps

Developing 50 Usable, with meaningful gaps to close

Tessell Database APIThe Database API from Tessell — 6 operation(s) for database.54.2 ArangoDB Databases APIManage databases for organizing collections52.3 Scaleway Databases APIDatabases can be used to store and manage sets of structured information, or data. The interaction between ...51.6 Convex Server SDKThe Convex Server SDK (convex/server) is the TypeScript library for defining backend logic deployed on Conv...50.7 Select Star Databases APIThe databases API from Select Star — 3 operation(s) for databases.50.6 Hostingsurge Databases APIThe Databases API from Hostingsurge — 24 operation(s) for databases.50.4 AlgoSeek ArdaDB Query ServiceManaged ClickHouse-based columnar cloud database (AWS us-east-1) pre-loaded with two petabytes of AlgoSeek ...50.3 Oracle Database API for MongoDBMongoDB-compatible API for Oracle Database.50.3 Oracle Database Databases APIManage databases within DB Systems50.3 Data Management for VMware Tanzu REST APIREST API for Data Management for VMware Tanzu providing database-as-a-service capabilities for provisioning...49.8 Encore Infrastructure APIEncore's Infrastructure from Code API lets developers declare cloud infrastructure resources — PostgreSQL d...49.3 Coolify Databases APIDatabases48.9 Oracle Essbase Databases APIManage databases (cubes) within applications48.9 Kinetica Database REST APIPOST-only JSON REST API exposed by every Kinetica deployment on port 9191. Endpoints cover SQL execution (/...48.8 Kinetica Toolbelt MCP ServerHosted Model Context Protocol server that gives any MCP-speaking agent a single endpoint onto a Kinetica da...48.8 Supabase Database APIManage database configurations, migrations, and extensions.48.7 Supabase Realtime APIThe Supabase Realtime API provides WebSocket-based subscriptions for real-time data changes from PostgreSQL...48.7 Oracle APEX REST Data Services APIRESTful API for Oracle APEX applications enabling data access and manipulation through REST endpoints.48.5 Oracle APEX SQL Workshop APIAPI for accessing SQL Workshop functionality programmatically.48.5 Oracle ORDS Database APIREST API for Oracle Database management and monitoring operations through ORDS, including pluggable databas...48.5 InternetData Database APIDownload IP database files and fetch their checksums.48.2 Happyrobot Twin MCP ServerFirst-party remote MCP server over the customer's Twin database — 9 published tools covering schema introsp...47.9 CrateDB HTTP SQL EndpointCrateDB's native developer interface: a JSON-over-HTTP SQL endpoint. Clients POST a JSON body ({"stmt": ".....47.8 Redis CoreCore Redis commands and data structure operations. Redis supports strings, hashes, lists, sets, sorted sets...46.5 Digital Ocean Databases APIDigitalOcean's [managed database service](https://docs.digitalocean.com/products/databases) simplifies the ...46.4 ScyllaDB Admin REST APINode-level administrative REST API exposing endpoints to check and update configuration, retrieve cluster-l...45.2 TimeFusion (Timeseries Engine)Rust-based timeseries database for events, logs, traces, and metrics using a PostgreSQL dialect over S3 / D...45.2 SAP HANA SQL APISQL interface for querying and managing data in SAP HANA databases.44.8 Statistics Finland Databases APIThe Databases API from Statistics Finland — 1 operation(s) for databases.44.6 SAP HANA XS Advanced APIAPIs for building analytics applications on SAP HANA XS Advanced platform.43.7 OpenMetadata Databases APIA `Database` also referred to as `Database Catalog` is a collection of schemas.42.6 Result BackendHosted application backend consumed through the first-party @resultdev/sdk client and administered with @re...42.3 BRYTER Database APIREST API for reading and synchronizing BRYTER database data across platforms and external systems. Authenti...42.2 Qovery Databases APIThe Databases API from Qovery — 4 operation(s) for databases.42.1 Deno KV APIDeno KV is a key-value database built directly into the Deno runtime and available as a globally distribute...41.7 Moody's RMS Databases APIThe Databases API from Moody's RMS — 5 operation(s) for databases.41.3 SAP SQL Anywhere HTTP Web ServicesSAP SQL Anywhere includes a built-in HTTP web server that exposes database objects as OData and REST web se...41.3 Sybase Databases APIOperations for managing databases within an SAP ASE server including creation, configuration, and status mo...41.3 Entity Framework 6The mature and stable ORM for .NET Framework with Code First, Database First, and Model First workflows.41.1 Entity Framework CoreA lightweight, extensible, open source and cross-platform ORM for .NET. Supports SQL Server, PostgreSQL, My...41.1 Apache CouchDB Database APIDatabase management operations40.9 Apache Nutch Database APIQuery the CrawlDB and FetchDB40.7 Apache Superset Database APIThe Database API from Apache Superset — 8 operation(s) for database.40.7 Anything Databases APIThe Databases API from Anything — 5 operation(s) for databases.40.1 TiKV Java ClientThe official Java client for TiKV. Supports raw key-value operations and transactional operations via gRPC....39.5 TiKV Python ClientThe official Python client for TiKV supporting raw and transactional key-value operations.39.5 TiKV Rust ClientThe official Rust client for TiKV providing raw and transactional key-value access to TiKV clusters.39.5 Microsoft Access Database Engine APIAPI for programmatic access to Microsoft Access databases through various interfaces including ODBC, OLE DB...39.4 OpenMLDB APIServer REST APIThe HTTP/JSON surface of OpenMLDB's optional APIServer module — insert rows into a table, invoke a deployed...39.3 OpenMLDB Cluster RPC ServicesThe Protobuf/brpc service contracts behind an OpenMLDB cluster — TabletServer, NameServer, TaskManager, the...39.3

Thin 47 Limited public surface area

Agno Database APIThe Database API from Agno — 2 operation(s) for database.38.9 SpacetimeDB HTTP APIThe SpacetimeDB HTTP API lets clients and tools interact with SpacetimeDB databases: publish and delete dat...38.9 Discogs Database APIAccess Discogs database: artists, releases, masters, labels, and search.38.1 UCloud Open APIAction-based RPC API covering every UCloud product (compute, networking, storage, databases, Kubernetes, mo...38.1 Commvault Databases APIManage database protection37.9 Apache Cassandra CQL Native ProtocolCassandra Query Language (CQL) is the primary interface to Apache Cassandra. Clients speak the binary CQL n...37.7 Cassandra Document API (Stargate)Schemaless Document API that stores JSON documents in Cassandra, offering a MongoDB-like developer experien...37.7 Cassandra GraphQL API (Stargate)GraphQL endpoint for Cassandra, enabling flexible, typed queries and mutations against Cassandra tables thr...37.7 Cassandra gRPC API (Stargate)High-performance gRPC API for Cassandra through Stargate, designed for low-latency service-to-service commu...37.7 Cassandra REST API (Stargate)HTTP/JSON REST API for Cassandra provided by the Stargate data gateway. Enables CRUD operations and SQL-lik...37.7 Tableau Hyper APICreate, read, update, and delete data in .hyper files for use in Tableau Desktop and Server with high-perfo...37.3 HepCloud APIHepCloud API as documented publicly: 47 operations. Contract generated from the documentation by API Evange...36.4 QuickNode Database APIManage key-value namespaces (databases).35.4 Ditto SDKMulti-platform embeddable SDK for peer-to-peer and cloud-synced data storage. Supports Swift, Kotlin, Flutt...35.2 Inspur Cloud RDS for MySQL APIREST API for Inspur Cloud's managed MySQL relational database service — instance lifecycle, instance classe...34.9 Inspur Cloud Time Series Database (TSDB) APIREST API for Inspur Cloud's managed time-series database — instance lifecycle, parameter configuration, dat...34.9 OpenStack Database (Trove) APITrove is the OpenStack Database-as-a-Service that provisions and manages database instances (MySQL, Postgre...34.5 Metabase Databases APIManage data source connections and metadata.34.2 AACT DatabaseAACT (Aggregate Analysis of ClinicalTrials.gov) is a publicly available relational database of all Clinical...34.0 SurrealDB HTTP REST APIThe SurrealDB HTTP REST API provides stateless access to SurrealDB instances over standard HTTP. It support...34.0 Spring Data REST APIExposes Spring Data repositories as hypermedia-driven RESTful resources automatically. Supports HAL, collec...33.7 Caspio REST APIREST API for Caspio Bridge accounts providing programmatic access to tables, views, records, files, users, ...33.4 Apache Hive Databases APIDatabase metadata operations32.9 Netter Databases APIThe databases API from Netter — 6 operation(s) for databases.32.9 Quandl (Nasdaq Data Link) Databases APIDatabase catalog and metadata32.1 Amazon Relational Database ServiceRDS backs the platform databases. The archived contract at openapi/aws-rds-openapi-original.yml does not pa...31.1 Knack REST APIResource-oriented REST API for managing records in Knack applications. Supports create, retrieve, update, a...30.9 Vert.x SQL ClientA high-performance reactive SQL client for Vert.x supporting PostgreSQL, MySQL, Microsoft SQL Server, IBM D...30.8 Airlabs Aircraft Fleet Database APIAccess global aircraft fleet data with registration numbers, ICAO hex codes, manufacturer serial numbers, a...29.8 Airlabs Airlines Database APILook up airline information including IATA and ICAO codes, callsign, country, fleet size, average fleet age...29.8 Airlabs Airports Database APIAccess a comprehensive global airport database with IATA and ICAO codes, coordinates, elevation, runway cou...29.8 Airlabs Cities Database APIRetrieve city data including IATA city codes, coordinates, country, timezone, population, and multilingual ...29.8 Airlabs Routes Database APIQuery airline routes between airports with departure and arrival times in local and UTC, operating days of ...29.8 Spin SQLite APIThe Spin SQLite API provides Spin components with access to an embedded relational database. Components can...29.8 HashiCorp Vault Database APIDatabase dynamic credentials secrets engine29.7 Spring Data JPASimplifies the development of creating a JPA-based data access layer. Reduces boilerplate code and provides...29.7 Triplit HTTP APIRESTful HTTP API for interacting with a Triplit sync server, supporting fetch, insert, bulk-insert, update,...29.5 StepZen GraphQL APIGraphQL API platform for connecting to REST, databases, and other backends, automatically generating a Grap...29.1 Softr Databases APIList and manage Softr Databases.27.9 Railway Plugins APIGraphQL operations for legacy plugins (managed database add-ons such as Postgres, MySQL, Redis, and MongoDB...27.3 DoltHub Databases APIThe Databases API from DoltHub — 3 operation(s) for databases.27.2 planetscale Databases APIManage PlanetScale databases, including creating, listing, updating settings, and deleting databases.27.2 Sevalla Databases APIProvision and manage managed databases.26.9 Preset Databases APIThe Databases API from Preset — 2 operation(s) for databases.26.7 Apache ShardingSphere Databases APIThe Databases API from Apache ShardingSphere — 2 operation(s) for databases.26.5 Grapes Knowledge Base Databases APIThe Databases API from Grapes Knowledge Base — 4 operation(s) for databases.26.2 YGOPRODeck Database APIDatabase version and freshness information.26.2

Emerging 22 Early or largely undocumented

Stardog HTTP APIComprehensive HTTP API for managing Stardog databases, executing SPARQL queries, running transactions, mana...25.4 Aerospike REST GatewayHTTP/JSON gateway that exposes Aerospike database operations including key-value reads/writes, batch, opera...25.2 EdgeDB EdgeQL HTTP APIExecutes EdgeQL queries over HTTP against a Gel/EdgeDB instance. Supports GET and POST requests with query,...25.0 EdgeDB GraphQL APIProvides a GraphQL endpoint for querying an EdgeDB/Gel instance, supporting queries, mutations, and introsp...25.0 Fibery HTTP APICommand-based REST API for managing Fibery workspace entities, databases, views, files, and automation via ...24.6 DBRepo API (research database repository)A DBRepo deployment run by the Universitaets- und Landesbibliothek for publishing and querying research dat...24.1 Agworld DBX (Greenbook)Label, manufacturer, ingredient, and pest database powering product selection and compliance inside Agworld...23.8 Reactome Database APIDatabase info queries23.4 NJU Table (南大表格) — SeaTable deploymentAn institution-hosted SeaTable 6.1.9 enterprise-edition deployment offering collaborative tables to NJU use...22.9 Wine Vybe Beer APIThe Wine Vybe Beer API provides access to brewery details, ABV data, beer descriptions, food pairing recomm...20.1 Wine Vybe Liquor APIThe Wine Vybe Liquor API provides access to spirits and liquor data including distillery information, tasti...20.1 Wine Vybe Wine APIThe Wine Vybe Wine API provides access to thousands of wines with data including wine regions, grape variet...20.1 Chick-fil-A Databases APIRDS, DynamoDB, and Redshift inventory.19.3 8base GraphQL APIThe 8base GraphQL API provides auto-generated queries, mutations, and subscriptions for every data table in...18.5 Rowy Firestore DataRowy tables map directly onto Google Cloud Firestore collections. Programmatic data access is not a Rowy-sp...18.1 Nitric SQL Database ResourceSDK resource for declaring managed relational (Postgres) databases with migrations. Nitric provisions the c...17.8 IBM Db2 REST ServicesNative Db2 REST services that allow applications to create, discover, execute, and manage user-defined serv...14.0 libpq C Client Librarylibpq is the official C application programmer's interface to PostgreSQL and the underlying library used by...11.6 PostgreSQLOpen-source relational database with advanced SQL compliance and extensibility. Client libraries available ...11.6 PostgreSQL JDBC DriverThe official Type 4 JDBC driver for PostgreSQL enables Java applications to connect to PostgreSQL using the...11.6 PostgreSQL ODBC Driver (psqlODBC)The official ODBC driver for PostgreSQL providing Open Database Connectivity for Windows, Linux, and macOS ...11.6 PostgreSQL Wire ProtocolThe PostgreSQL frontend/backend protocol is the low-level message-based protocol used by all client drivers...11.6

Minimal 7 Almost no public developer surface

Moodle Data Manipulation API (DML)Enables safe, consistent database read and write operations across Moodle, abstracting the underlying datab...10.6 Jakarta Persistence APIThe Jakarta Persistence specification for object-relational mapping in Java applications, defining annotati...8.2 SQLAlchemySQL toolkit and Object-Relational Mapping (ORM) library.7.4 Dietagram Nutrition APIProvides access to Dietagram's extensive food database and nutritional standards for integrating nutrition ...7.1 JD Cloud Database (RDS) APIsJD Cloud database APIs provision and manage relational databases (MySQL, SQL Server, PostgreSQL, MariaDB), ...7.0 Fauna Event Feeds APIThe Fauna Event Feeds API provides a polling-based approach to change data capture, complementing the real-...0.0 Fauna Event Streaming APIThe Fauna Event Streaming API enables real-time change data capture by maintaining an open connection to th...0.0

Companies reaching this through an API (88)

These companies publish an API, specification or operation carrying “Database” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Agno Agworld Airlabs AlgoSeek ALTR Amazon Athena Amazon Web Services Android Anything Apache Hive Apache Nutch Apache Superset APIs.io Engineering Platform APIToolkit (Monoscope) Aptible Azure Synapse Analytics Bryter Chick-fil-A ClinicalTrials.gov Cloudflare Collate Commvault Confluence Coolify cPanel Deno Digital Ocean Discogs Encore Factset Fibery GitHub Gluu Google Grapes Knowledge Base Happyrobot HashiCorp Vault HepCloud Hostingsurge InternetData JD.com (Jingdong) Laravel Linode Metabase Microsoft Azure Microsoft Azure Cache For Redis Microsoft Power Platform APIs Moodle Moody's RMS Nanjing University

Show all 88 companies ↓

Nanonets Netlify Netter Nitric Nutrition & Exercise API OpenMetadata OpenStack Oracle Essbase Partnerize PixieBrix Preset Python Standard Library and Popular Qovery Quandl (Nasdaq Data Link) QuickNode Railway Reactome Rowy SAP Business Intelligence Screenpipe Select Star Snowflake SolarWinds SpecterOps Spin Spring Boot Stardog Statistics Finland StepZen Tableau Desktop Technical University of Darmstadt The MONA Group Treasure Data UCloud Vert.x Viam VMware YGOPRODeck

Score breakdown

Frequency

69.5

log-scaled weighted occurrences

Breadth

3.2

spread across providers

Quality lift

40.2

mean composite of providers using it

Cohesion

20.2

strength of nearest seed neighbor

Where this tag sits

246 providers carry this tag directly, and 291 counting the 16 narrower tags below — 45 more to reach.

NoSQL 33 providers Relational Database 9 providers Distributed SQL 8 providers Distributed Database 7 providers Document Database 9 providers Key-Value Store 14 providers Graph Database 14 providers Vector Search narrower Time Series Database 3 providers Database-as-a-Service 11 providers Managed Database 13 providers Cloud Database 11 providers PostgreSQL 53 providers MySQL 16 providers MongoDB 7 providers Redis 9 providers

Where this tag comes from

Provider tag246

Api tag197

Openapi tag53

Openapi op tag324

Markets provisional

Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.

Market	Share of the market's providers
Databases (PostgreSQL wire)	90%
Retrieval, Vector and RAG	38%
Streaming (Apache Kafka protocol)	25%
Jamstack Hosting Integrations (Vercel Marketplace and Netlify Integrations publishers)	21%
Search API (Elasticsearch / OpenSearch shape)	20%

Cohort brief

Auto-generated

The 228 providers in the APIs.io catalog tagged Database, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

228

of 246 in the catalog

Mean Kin Score

41.5

+17.4 vs catalog 24.1

Mean Agent Readiness

25.2

+11.1 vs catalog 14.1

Spread

0–84.6

median 39.8 · σ 19.7

How the 228 split by band

Exemplar 29Strong 34Developing 56Thin 59Emerging 36Minimal 14

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Developer Ergonomics	46.5	24.5	+22	228
Contract Quality	39.1	18.6	+20.5	228
Operational Transparency	29.1	13.2	+15.9	228
Access Clarity	43.5	30	+13.5	228
Discoverability	66.9	59.1	+7.8	228
Contract Governance	16.9	9.7	+7.2	228

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes

Artifact	This cohort	Catalog	Difference
MCP server (any)	38%	18%	+20
MCP server (first-party)	34%	16%	+18
Agent Skills	0%	0%	0
OAuth scopes	17%	13%	+4
Security	98%	99%	-1
Arazzo workflows	8%	1%	+7
Governance rules	73%	36%	+37

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score

1 Appwrite 84.6
2 CData 84
3 Amazon DynamoDB 82.4
4 Quickbase 80.5
5 MongoDB 79.9
6 Cockroach Labs 79.2
7 ClickHouse 77.1
8 Amazon Lightsail 76.4
9 Oracle Cloud Infrastructure 75.6
10 Prisma 74.9

Work with this as data

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

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this

find_tagsBrowse and filter every tag in the catalog.
get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
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.

All 92 tools →

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Database

Providers using this tag (246)

APIs with this tag (198)