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 22 Complete, well-documented, and agent-ready

Appwrite Functions APIThe Functions Service allows you view, create and manage your Cloud Functions. 28 operations across 18 path...84.6 Shopify Functions APIShopify Functions allow developers to customize the backend logic that powers parts of Shopify. Functions a...83.8 Cloudflare Agents APIThe Cloudflare Agents SDK enables developers to build and deploy AI-powered agents that autonomously perfor...82.5 Cloudflare Containers APIThe Cloudflare Containers API allows developers to run container workloads on Cloudflare's global network, ...82.5 Cloudflare Workers for Platforms APIThe Workers for Platforms API from Cloudflare — 13 operation(s) for workers for platforms.82.5 Cloudflare Workflows APIThe Workflows API from Cloudflare — 19 operation(s) for workflows.82.5 MongoDB Atlas App Services Admin APIAdmin API for MongoDB Atlas App Services (formerly Realm), used to manage applications, services, functions...79.9 Atlassian Forge App REST APIThe Atlassian Forge App REST API enables Forge apps to expose custom REST API endpoints for external system...79.8 Atlassian Forge Platform REST APIThe Atlassian Forge Platform REST API provides programmatic access to the Forge serverless cloud app develo...79.8 Medplum BotsBots are TypeScript serverless functions (AWS Lambda-style) executed in response to FHIR Subscriptions, HTT...77.9 Azure Functions Runtime APIThe Azure Functions host runtime provides HTTP endpoints for function invocation, admin operations, host st...76.2 Microsoft Azure Event Grid APIAzure Event Grid is a fully managed event routing service that enables developers to build event-driven arc...75.7 Microsoft Azure Functions APIAzure Functions is an event-driven serverless compute platform that enables developers to build and run app...75.7 Amazon Redshift Serverless APIThe Amazon Redshift Serverless API for managing serverless data warehouse workgroups, namespaces, and capac...75.1 AWS Lambda Extensions APIThe Lambda Extensions API enables you to create extensions that integrate with the Lambda execution environ...75.0 AWS Lambda Logs APIThe Lambda Logs API enables extensions to subscribe to log streams generated by the Lambda platform, functi...75.0 AWS Lambda Runtime APIThe Lambda Runtime API enables you to use custom runtimes to run functions in any programming language. The...75.0 AWS Lambda Telemetry APIThe Lambda Telemetry API lets you collect telemetry data directly from the Lambda execution environment. Ex...75.0 OCI Functions APIFully managed, serverless Functions-as-a-Service platform built on the open source Fn Project engine, suppo...70.4 OCI Queue APIServerless messaging service for decoupling application components with reliable message delivery, supporti...70.4 Palo Alto Networks Serverless API{'$ref': 'desc/serverless/serverless.md'}68.8 AWS Fargate APIAWS Fargate is a serverless compute engine for containers that works with both Amazon ECS and Amazon EKS re...68.5

Strong 14 Solid coverage with minor gaps

Modal Functions and Remote InvocationDecorate Python functions with @app.function to run them remotely on Modal's cloud. Invoke deployed functio...66.1 Modal Functions APIDefines, deploys, and invokes serverless Python Functions on Modal with per-function GPU/CPU/memory configu...66.1 IBM Cloud Code EngineRun containerized workloads without managing servers.65.8 IBM Cloud FunctionsRun lightweight code that executes application logic in a scalable way using an event-driven serverless com...65.8 Hugging Face Inference APIServerless inference API for running predictions against thousands of models hosted on the Hugging Face Hub...65.4 Zoho CatalystThe Zoho Catalyst API provides programmatic access to serverless application development features, includin...63.7 Fusio Worker APIThe Fusio Worker API enables executing API action logic in multiple programming languages by forwarding req...61.0 Lumigo APIProgrammatic access to the Lumigo observability platform, authenticated with an API token (x-api-key header...58.6 Formboost Form Submission APISingle public unauthenticated HTTP endpoint (POST https://formboost.app/f/{alias}) that accepts JSON or for...57.9 Fermyon Wasm FunctionsFermyon Wasm Functions is a multi-tenant, hosted, globally distributed engine for serverless functions runn...57.5 Neon Data APIThe Neon Data API provides a secure, stateless HTTP interface to Neon Postgres databases, allowing develope...56.0 Neon Serverless DriverThe Neon Serverless Driver is a low-latency JavaScript and TypeScript driver that enables querying Neon Pos...56.0 RunPod GraphQL APIThe RunPod GraphQL API provides programmatic access to Pods, templates, and Serverless endpoints via GraphQ...54.3 RunPod ServerlessRunPod Serverless provides pay-as-you-go inference endpoints with autoscaling workers, queue-based and load...54.3

Developing 15 Usable, with meaningful gaps to close

PlayFab CloudScript APIPlayFab CloudScript runs server-authoritative game logic in PlayFab. Modern CloudScript using Azure Functio...54.2 IronWorkerIronWorker is a container-based, massively parallel, multi-language work-on-demand platform. The REST API l...53.5 Vast.ai REST APIThe Vast.ai REST API is the control plane for the GPU marketplace. It supports searching offers across host...53.5 Vast.ai Serverless APIThe Serverless API from Vast.ai — 9 operation(s) for serverless.53.5 Red Hat OpenShift Serverless (Knative) APIOpenShift Serverless, based on Knative, enables deploying and managing event-driven serverless workloads on...53.2 Adobe I/O RuntimeA serverless computing platform built on Apache OpenWhisk that enables developers to deploy and execute cus...53.0 Novita AI GPU APIOn-demand GPU instance management and templates plus serverless GPU endpoints. Create, start, stop, and del...52.3 Knative FunctionsKnative Functions enables developers to create, build, and deploy stateless, event-driven functions as Knat...47.5 Momento Cache HTTP APIRegion-scoped HTTP API for reading, writing, and deleting cache items in a Momento cache without a gRPC cli...47.5 CloudGuard Serverless APIThe Serverless API from CloudGuard — 36 operation(s) for serverless.46.8 Turso SQL over HTTP APIHTTP API for executing SQL statements directly against a Turso database instance at the edge. Supports quer...45.9 WeChat Cloud Hosting APIWeChat Cloud Hosting (微信云托管) is Tencent's cloud-native, ops-free container deployment service tightly integ...45.1 Dome9 Serverless APIThe Serverless API from Dome9 — 36 operation(s) for serverless.43.6 Result BackendHosted application backend consumed through the first-party @resultdev/sdk client and administered with @re...42.3 Glia Functions APIGlia Functions is a serverless JavaScript runtime (workerd) inside the Glia platform, with REST endpoints f...41.9

Thin 15 Limited public surface area

Lancaster Library Alma Webhook Handler (open source)An AWS serverless application written and maintained by Lancaster University Library that listens for Ex Li...38.1 W&B Serverless Inference (CoreWeave)OpenAI-compatible inference API for hosted open-source foundation models, running on CoreWeave GPU infrastr...38.1 Nhost Serverless Functions APIDeploy JavaScript and TypeScript serverless functions as HTTP API endpoints for webhooks, event triggers, a...38.0 Spocket MCP ServerHosted MCP server (Streamable HTTP) with ~20 tools for deploying and managing always-on apps. Uses OAuth 2....36.0 Spocket Platform REST APIWhite-label reseller/provisioning REST API for hosting apps from a customer backend. OAuth2 client-credenti...36.0 QuickNode FunctionsServerless on-chain logic runtime for executing custom code triggered by Streams or HTTP.35.4 Upstash Developer APIManagement API for creating and administering Upstash Redis, Kafka, and Vector databases, teams, and accoun...35.2 Upstash Redis REST APIPer-database REST API for executing Redis commands over HTTPS from edge and serverless runtimes. Uses Beare...35.2 Apache Camel K Operator APIThe Apache Camel K Operator exposes a Kubernetes Custom Resource API for deploying and managing Camel integ...30.0 Apache Camel Quarkus APIApache Camel Quarkus provides native compilation and fast startup of Camel routes on Quarkus, enabling serv...30.0 AWS EventBridgeAWS serverless event router. "EventBridge is a serverless service that uses events to connect application c...29.3 PubNub FunctionsEdge serverless functions executed on PubNub's network in response to messages, presence events, or HTTP tr...29.2 Tenderly Web3 Actions APIDeploy and manage serverless JavaScript/TypeScript functions triggered by on-chain or off-chain events, ena...29.1 PlanetScale Serverless Driver for JavaScriptThe PlanetScale Serverless Driver for JavaScript is a Fetch API-compatible database driver designed for ser...27.2 DBOS CloudDBOS Cloud is the managed, serverless hosting platform for DBOS workflows, queues, and scheduled jobs. The ...26.5

Emerging 6 Early or largely undocumented

Nebius Token FactoryNebius Token Factory is the AI model inference platform offering OpenAI-compatible endpoints for serving op...23.2 QuirrelQuirrel provides a JavaScript and TypeScript SDK for enqueuing, scheduling, retrying, and managing backgrou...22.1 SST FrameworkThe SST framework is an open source CLI and component library distributed via npm (`sst`) and as a Go-based...20.6 8base GraphQL APIThe 8base GraphQL API provides auto-generated queries, mutations, and subscriptions for every data table in...18.5 Alibaba Cloud APIAlibaba Cloud provides a comprehensive API ecosystem covering all major cloud services including Elastic Co...17.9 LivePerson FunctionsServerless platform for building, deploying, and invoking custom functions that extend LivePerson conversat...17.3

Minimal 1 Almost no public developer surface

Serverless WorkflowServerless Workflow is a vendor-neutral specification for defining cloud-native serverless orchestration wo...5.0

Companies reaching this through an API (30)

These companies publish an API, specification or operation carrying “Serverless” 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.

Score breakdown

Frequency

58.6

log-scaled weighted occurrences

Breadth

1.8

spread across providers

Quality lift

44.5

mean composite of providers using it

Cohesion

10.9

strength of nearest seed neighbor

Where this tag comes from

Provider tag140

Api tag73

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
Jamstack Hosting Integrations (Vercel Marketplace and Netlify Integrations publishers)	23%
Databases (PostgreSQL wire)	21%

Cohort brief

Auto-generated

The 132 providers in the APIs.io catalog tagged Serverless, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

132

of 140 in the catalog

Mean Kin Score

46.6

+22.5 vs catalog 24.1

Mean Agent Readiness

27.1

+13.0 vs catalog 14.1

Spread

0–84.6

median 47.5 · σ 21

How the 132 split by band

Exemplar 28Strong 24Developing 27Thin 33Emerging 11Minimal 9

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Developer Ergonomics	50.9	24.5	+26.4	132
Contract Quality	44.3	18.6	+25.7	132
Operational Transparency	35.1	13.2	+21.9	132
Access Clarity	51	30	+21	132
Contract Governance	18.1	9.7	+8.4	132
Discoverability	67.2	59.1	+8.1	132

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)	39%	18%	+21
MCP server (first-party)	38%	16%	+22
Agent Skills	0%	0%	0
OAuth scopes	18%	13%	+5
Security	99%	99%	0
Arazzo workflows	14%	1%	+13
Governance rules	75%	36%	+39

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

Work with this as data

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

MCP server

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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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Serverless

Providers using this tag (140)

APIs with this tag (73)