Restack

Restack is an enterprise AI agent platform and backend framework for building accurate, reliable, and scalable AI products. It provides durable workflow orchestration, long-running agent execution, and infrastructure for deploying AI agents at enterprise scale using Python and Kubernetes.

Restack publishes 3 API contracts indexed on the APIs.io network: Agents API, System API, and Workflows API. Tagged areas include AI Agents, Workflows, Orchestration, Enterprise, and Python.

The Restack catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Restack’s developer surface includes authentication, documentation, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

35.7/100 thin ▬ flat Agent 22/100 agent aware Front door AI 3/6 light Heartbeat 33/100 slowing Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

AI Agents Workflows Orchestration Enterprise Python

Kin Score

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

Composite quality — 35.7/100 · thin

Contract Quality 10.9 / 19

Developer Ergonomics 6.1 / 15

Access Clarity 1.2 / 15

Operational Transparency 1.0 / 10

Contract Governance 2.5 / 9

Discoverability 5.5 / 8

Regulatory Posture 2.5 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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

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.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. 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
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
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)

8 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 40.5 — up to +11.9 composite points
Operational Transparency scores 10.5 — up to +11.6 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/restack/apis.yml: open an issue on github.com/api-evangelist/restack 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 3

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

Restack Agents API

The Agents API from Restack — 2 operation(s) for agents.

Restack System API

The System API from Restack — 1 operation(s) for system.

Restack Workflows API

The Workflows API from Restack — 2 operation(s) for workflows.

Open Collections 4

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

Restack Agents API

OPEN COLLECTION

Restack Agents System API

OPEN COLLECTION

Restack Agents Workflows API

OPEN COLLECTION

Restack API

OPEN COLLECTION

Restack API pricing

Not yet checked against Restack's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Restack's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Restack Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Restack Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Restack

SLA

FinOps 1

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

Restack Finops

FINOPS

Semantic Vocabularies 1

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

Restack Context

29 classes · 0 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Restack — jsonschema rules

5 rules · 3 warnings 2 info

SPECTRAL

Restack API Rules

10 rules · 1 errors 7 warnings 2 info

SPECTRAL

JSON Schema 2

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

Agent Run

8 properties

JSON SCHEMA

Workflow Run

8 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Restack Agent Run Structure

0 properties

JSON STRUCTURE

Examples 3

Example request and response payloads for these APIs.

Restack Get Agent Run Example

2 fields

EXAMPLE

Restack Schedule Agent Example

2 fields

EXAMPLE

Restack Schedule Workflow Example

2 fields

EXAMPLE

Security Posture 2

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

Restack Authentication

http · 1 scheme

SECURITY

Restack Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Restack Agentic Access

5 operations · 2 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Python SDK

Python SDK

TypeScript SDK

TypeScript SDK

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

Website

Website

LinkedIn

Other 1

Properties that don't map to a standard resource type

Kubernetes Helm

Kubernetes Helm

Source (apis.yml)

aid: restack
name: Restack
description: Restack is an enterprise AI agent platform and backend framework for building accurate, reliable, and scalable
  AI products. It provides durable workflow orchestration, long-running agent execution, and infrastructure for deploying
  AI agents at enterprise scale using Python and Kubernetes.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/restack.png
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- AI Agents
- Workflows
- Orchestration
- Enterprise
- Python
url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/apis.yml
created: '2025-02-17'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: restack:restack-agents-api
  name: Restack Agents API
  description: The Agents API from Restack — 2 operation(s) for agents.
  humanURL: https://www.restack.io/
  baseURL: https://api.restack.io
  tags:
  - Agents
  properties:
  - type: OpenAPI
    url: openapi/restack-agents-api-openapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/json-schema/restack-agent-run-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/json-schema/restack-workflow-run-schema.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/vocabulary/restack-vocabulary.yml
  - type: Documentation
    url: https://docs.restack.io/
  - type: GettingStarted
    url: https://docs.restack.io/
  - type: GitHubOrganization
    url: https://github.com/restackio
  - type: Python SDK
    url: https://github.com/restackio/examples-python
  - type: TypeScript SDK
    url: https://github.com/restackio/examples-typescript
  - type: Kubernetes Helm
    url: https://github.com/restackio/helm
  - type: Boilerplate
    url: https://github.com/restackio/boilerplate
- aid: restack:restack-system-api
  name: Restack System API
  description: The System API from Restack — 1 operation(s) for system.
  humanURL: https://www.restack.io/
  baseURL: https://api.restack.io
  tags:
  - System
  properties:
  - type: OpenAPI
    url: openapi/restack-system-api-openapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/json-schema/restack-agent-run-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/json-schema/restack-workflow-run-schema.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/vocabulary/restack-vocabulary.yml
  - type: Documentation
    url: https://docs.restack.io/
  - type: GettingStarted
    url: https://docs.restack.io/
  - type: GitHubOrganization
    url: https://github.com/restackio
  - type: Python SDK
    url: https://github.com/restackio/examples-python
  - type: TypeScript SDK
    url: https://github.com/restackio/examples-typescript
  - type: Kubernetes Helm
    url: https://github.com/restackio/helm
  - type: Boilerplate
    url: https://github.com/restackio/boilerplate
- aid: restack:restack-workflows-api
  name: Restack Workflows API
  description: The Workflows API from Restack — 2 operation(s) for workflows.
  humanURL: https://www.restack.io/
  baseURL: https://api.restack.io
  tags:
  - Workflows
  properties:
  - type: OpenAPI
    url: openapi/restack-workflows-api-openapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/json-schema/restack-agent-run-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/json-schema/restack-workflow-run-schema.json
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/restack/refs/heads/main/vocabulary/restack-vocabulary.yml
  - type: Documentation
    url: https://docs.restack.io/
  - type: GettingStarted
    url: https://docs.restack.io/
  - type: GitHubOrganization
    url: https://github.com/restackio
  - type: Python SDK
    url: https://github.com/restackio/examples-python
  - type: TypeScript SDK
    url: https://github.com/restackio/examples-typescript
  - type: Kubernetes Helm
    url: https://github.com/restackio/helm
  - type: Boilerplate
    url: https://github.com/restackio/boilerplate
common:
- type: Plans
  url: plans/restack-plans-pricing.yml
- type: RateLimits
  url: rate-limits/restack-rate-limits.yml
- type: FinOps
  url: finops/restack-finops.yml
- type: AgenticAccess
  url: agentic-access/restack-agentic-access.yml
- type: DomainSecurity
  url: security/restack-domain-security.yml
- type: Authentication
  url: authentication/restack-authentication.yml
- type: Website
  url: https://www.restack.io/
- type: Documentation
  url: https://docs.restack.io/
- type: GitHubOrganization
  url: https://github.com/restackio
- type: LinkedIn
  url: https://www.linkedin.com/company/restackio/
- type: Python SDK
  url: https://github.com/restackio/examples-python
- type: TypeScript SDK
  url: https://github.com/restackio/examples-typescript
- type: Kubernetes Helm
  url: https://github.com/restackio/helm
- type: LlmsText
  url: https://docs.restack.io/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Restack API — frequently asked questions

Does Restack have an API?

Yes. APIs.io lists 3 APIs from Restack, including Restack Agents API, Restack System API and Restack Workflows API.

Is there an OpenAPI specification for the Restack API?

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

How do I authenticate with the Restack API?

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

How much does the Restack API cost?

APIs.io lists 3 pricing plans for Restack, with each plan's price, limits and inclusions under Pricing on this page.

Is the Restack API ready for AI agents?

Restack has a Kin Score of 35.7 out of 100 (thin) and an Agent Readiness score of 22.1 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

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Tools for providers

9 MCP tools reach this

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get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
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.

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