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Modal

Modal is a serverless cloud platform for AI and data workloads. Modal lets developers write ordinary Python and run it on remote GPUs and CPUs with sub-second cold starts, instant autoscaling, and declarative container images. The platform's primitives — Functions, Sandboxes, Volumes, Images, Secrets, Dicts, Queues, Schedules, and Web Endpoints — cover inference, fine-tuning, multi-node training, batch processing, agent code execution, and HTTP/web APIs. Modal sells per-second metered compute across the full NVIDIA GPU lineup (T4 → B200) under Starter, Team, and Enterprise plans. Modal Labs raised a $355M Series C in 2026 and is used in production by Decagon, Runway, Physical Intelligence, Suno, Chai Discovery, Lovable, Quora, Reducto, and many others.

agent ready

Reference-quality API operations across every facet — a rich contract, published governance, transparent operations, and machine-readable commercial terms.

Kin Score

API Evangelist profiles Modal the way a machine reads it — 61 machine-readable artifacts across 17 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Modal scores 71.0/100 (exemplar), with a separate agent-readiness read of 55/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 71.0/100 · exemplar
Contract Quality 17.5 / 25
Developer Ergonomics 10.4 / 20
Commercial Clarity 15.8 / 20
Operational Transparency 8.9 / 13
Governance 10.4 / 12
Discoverability 8.0 / 10
Agent readiness — 55/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 7 / 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

How we profile Modal

Each block below is one kind of artifact we hold for Modal. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 17

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

Modal Apps API

Modal App lifecycle.

Modal Dicts API

Distributed key-value stores.

Modal Environments API

Modal workspace environments.

Modal Execution API

Process execution inside sandboxes.

Modal Files API

Volume file operations.

Modal Filesystem API

Sandbox filesystem operations.

Modal Functions API

Modal Function definitions, invocations, and scaling.

Modal Images API

Container image specifications and builds.

Modal Invocations API

Asynchronous function invocations and result retrieval.

Modal Queues API

Distributed FIFO queues.

Modal Sandboxes API

Sandbox lifecycle and management.

Modal Schedules API

Scheduled function executions.

Modal Secrets API

Encrypted environment-variable secrets.

Modal Tokens API

Modal API tokens.

Modal Volumes API

Volume lifecycle.

Modal WebEndpoints API

HTTP/ASGI/WSGI web endpoints backed by Modal Functions.

Modal Workspaces API

Modal workspaces.

Scroll within the panel for all 17 ·

Open Collections 9

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

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

Modal Functions API

OPEN COLLECTION

Modal Images API

OPEN COLLECTION

Modal Sandboxes API

OPEN COLLECTION

Modal Schedules API

OPEN COLLECTION

Modal Secrets API

OPEN COLLECTION

Modal Volumes API

OPEN COLLECTION

Modal Web Endpoints API

OPEN COLLECTION

Scroll within the panel for all 9 ·

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Modal Plans Pricing

3 plans

PLANS

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Modal Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

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

Modal Finops

FINOPS

Features 22

The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.

Notable capabilities this provider offers.

Serverless Python functions with sub-second cold starts and autoscaling container pools
GPU compute across T4, L4, A10, L40S, A100 40/80GB, RTX PRO 6000, H100, H200, and B200
Modal Sandboxes for executing untrusted user/agent code with full container isolation
Declarative Image builder with layered caching (pip_install, apt_install, run_commands, from_registry, from_dockerfile)
Modal Volumes — distributed file system with commit/reload semantics; v2 supports many concurrent writers
Cloud bucket mounts for S3, GCS, R2, and Azure
Dicts and Queues for cross-container shared state and coordination
Modal Secrets for encrypted environment-variable injection
Modal Cron and Period schedules with timezone support
Web Endpoints via FastAPI, ASGI, WSGI, and custom web servers — streaming and WebSockets
Proxy-auth tokens, custom URL labels, and live development with `modal serve`
`modal run`, `modal deploy`, `modal serve`, `modal shell`, `modal container exec` CLI workflows
Python SDK (`modal`) plus JavaScript/TypeScript and Go SDKs via `libmodal`
Modal Notebooks for interactive development with GPU attachment
Multi-node distributed training with gang scheduling
Memory snapshots and warm pools for sub-second cold starts on large models
Per-second metered billing for CPU, memory, and GPU with tag-based chargeback
Plan-based concurrency quotas (containers, GPUs, cron jobs, web endpoints)
Token id/secret authentication scoped to workspace and environment
Static outbound IP via `modal.Proxy` for IP-allowlisted integrations
Tunnels and port forwarding for sandbox networking
SOC 2 Type II certified

Scroll within the panel for all 22 ·

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

JSON-LD contexts and semantic vocabularies used across these APIs.

Modal Com Context

25 classes · 4 properties

JSON-LD

Spectral Rules 2

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

Modal API Rules

5 rules · 4 warnings

SPECTRAL

Modal API Rules

7 rules · 4 errors · 3 warnings

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

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

Modal Function

16 properties

JSON SCHEMA

Modal Sandbox

14 properties

JSON SCHEMA

Examples 2

Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.

Example request and response payloads for these APIs.

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Modal Com Authentication

http · 1 scheme

SECURITY

Modal Com Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Modal Com Agentic Access

56 operations · 28 acting · 3 human-in-the-loop

56 operations · 28 acting

AGENTIC

Resources

Every other property we hold for Modal — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 4

Portal, sign-up, and the first successful call

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Access & Security 3

Authentication, authorization, and security posture

Company 3

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/modal · machine-readable index on apis.io