Coasty website screenshot

Coasty

Coasty is a computer-use AI agent platform (Y Combinator S26) that operates a full desktop, browser, and terminal like a human — reading the screen with vision, clicking, typing, filling forms, running commands, and verifying its own work across sandboxed virtual machines. It exposes a public REST API at coasty.ai/v1 with a published OpenAPI 3.1 spec (72 operations), a first-party MCP server (npx @coasty/mcp, 26 tools), free sandbox keys, HMAC-SHA256 webhook triggers, an Idempotency-Key contract, per-credit metered billing, and 1,000+ OAuth app integrations via Composio. Core API surfaces are Predict, Sessions, Ground, Parse, Machines, Schedules, Runs, and Workflows. Founded 2025-2026 by Prateek Jannu and Nitish Kovuru; #1 on the OSWorld benchmark among production computer-use agents.

Coasty publishes 8 API contracts indexed on the APIs.io network, including Keys API, Machines API, Predict API, and 5 more. Tagged areas include Company, Computer Use, AI Agents, Automation, and RPA.

The Coasty catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Coasty’s developer surface includes authentication, documentation, API reference, getting-started guide, engineering blog, pricing, signup flow, and 32 more developer resources.

63.4/100 strong ▬ flat Agent 47/100 agent native Front door AI 4/6 moderate Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
AccessFreemiumSelf serve⚡ Free to try
1 published contract 1 MCP Servers 4 Agent Skills
CompanyComputer UseAI AgentsAutomationRPADesktop AutomationBrowser AutomationMCPVirtual MachinesDeveloper Tools

What this lets a business do 4

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Agent Infrastructure & Agentic Commerce
AE-100
RunsWorkflows
Developer Platform & API Ecosystem Management
BC-4270
Keys
POST /v1/keys DELETE /v1/keys/{key_id}
Information Technology Management
BC-600
Machines
POST /v1/machines POST /v1/machines/{machine_id}/start
AI Model Services
AE-110
Predict
POST /v1/predict POST /v1/ground GET /v1/models

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
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/.
Show this score on your site. Kin Score badge preview for Coasty It updates itself when the score changes. Paste this where you link to your API docs:
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Raise your score.
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
  • 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)
  • Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)
  • Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
3 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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/coasty/apis.yml: open an issue on github.com/api-evangelist/coasty 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

MarketPositionDepthRegistered MCP serverDeclares compatibility
RPA and Document AI (RPA marketplaces, intelligent document processing) undeclared - - -

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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.

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified
measured — observed by APIs.io (published)

APIs 8

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

Coasty Keys API

API key management and usage reporting.

Coasty Machines API

Provision and control managed VMs.

Coasty Predict API

Stateless CUA action prediction and grounding.

Coasty Runs API

Autonomous task runs — the agent drives a task to completion on a machine.

Coasty Schedules API

Cron and one-shot scheduled CUA jobs.

Coasty Sessions API

Stateful CUA sessions with persistent trajectory.

Coasty Triggers API

Webhook and chain triggers for schedules.

Coasty Workflows API

Versioned, branching multi-step automations (DSL) and their runs.

Scroll for all 8

Postman Collections 8

Ready-to-run Postman collections for exercising this provider's APIs.

Scroll for all 8

Open Collections 8

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

Coasty Public keys API

OPEN COLLECTION

Scroll for all 8

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Coasty Computer-Use MCP Server

First-party MCP server (npx -y @coasty/mcp; remote https://api.coasty.ai/mcp) exposing 26 computer-use tools across predict, machines, schedules, account, and discovery groups.

MCP SERVER

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

Coasty API pricing

Prices published by Coasty, read 2026-10-28 from coasty.ai/pricing.

PlanPrice
Pay as you go $0.05 per managed step
Includes: First $5 on us, Managed machines included, Every step streamed, No monthly minimum
Developer $19 per month
Includes: $25 of API credit every month, Developer dashboard, Same $0.05 managed steps
Enterprise Custom pricing
Includes: Custom credits, dedicated VMs, SLA, SSO, and priority support

Plan details, limits and sources →

Billed by: managed step · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Coasty Plans

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Coasty Rate Limits

2 limits

RATE LIMITS

Service Levels 1

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

Coasty

SLA

FinOps 1

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

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Coasty Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Coasty API Rules

75 rules · 61 errors 13 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Coasty Openapi Overlay

2 actions · update · coasty-openapi-original.json

DERIVED

Security Posture 3

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

Coasty Authentication

apiKey/http · 4 schemes

SECURITY

Coasty Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Coasty Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Coasty Agentic Access

72 operations · 42 acting · 5 human-in-the-loop

72 operations · 42 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

Documentation 3

Reference material describing how the API behaves

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Scroll for all 7

Build 3

SDKs, sample code, and the tooling you integrate with

Access & Security 5

Authentication, authorization, and security posture

Operate 4

Status, limits, changes, and where to get help

Commercial 4

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: coasty
name: Coasty
description: 'Coasty is a computer-use AI agent platform (Y Combinator S26) that operates a full desktop, browser, and terminal
  like a human — reading the screen with vision, clicking, typing, filling forms, running commands, and verifying its own
  work across sandboxed virtual machines. It exposes a public REST API at coasty.ai/v1 with a published OpenAPI 3.1 spec (72
  operations), a first-party MCP server (npx @coasty/mcp, 26 tools), free sandbox keys, HMAC-SHA256 webhook triggers, an Idempotency-Key
  contract, per-credit metered billing, and 1,000+ OAuth app integrations via Composio. Core API surfaces are Predict, Sessions,
  Ground, Parse, Machines, Schedules, Runs, and Workflows. Founded 2025-2026 by Prateek Jannu and Nitish Kovuru; #1 on the
  OSWorld benchmark among production computer-use agents.'
url: https://raw.githubusercontent.com/api-evangelist/coasty/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  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: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://coasty.ai/icon-512.svg
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: profiled
x-tier-reason: enrichment-pipeline
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Computer Use
- AI Agents
- Automation
- RPA
- Desktop Automation
- Browser Automation
- MCP
- Virtual Machines
- Developer Tools
apis:
- aid: coasty:coasty-keys-api
  name: Coasty Keys API
  description: API key management and usage reporting.
  humanURL: https://coasty.ai/docs
  tags:
  - Keys
  tags_raw:
  - keys
  properties:
  - type: OpenAPI
    url: openapi/coasty-keys-api-openapi.yml
  - type: Documentation
    url: https://coasty.ai/docs
  - type: APIReference
    url: https://coasty.ai/api-docs
  - type: GettingStarted
    url: https://coasty.ai/guide?tab=api
- aid: coasty:coasty-machines-api
  name: Coasty Machines API
  description: Provision and control managed VMs.
  humanURL: https://coasty.ai/docs
  tags:
  - Machines
  tags_raw:
  - machines
  properties:
  - type: OpenAPI
    url: openapi/coasty-machines-api-openapi.yml
  - type: Documentation
    url: https://coasty.ai/docs
  - type: APIReference
    url: https://coasty.ai/api-docs
  - type: GettingStarted
    url: https://coasty.ai/guide?tab=api
- aid: coasty:coasty-predict-api
  name: Coasty Predict API
  description: Stateless CUA action prediction and grounding.
  humanURL: https://coasty.ai/docs
  tags:
  - Predict
  tags_raw:
  - predict
  properties:
  - type: OpenAPI
    url: openapi/coasty-predict-api-openapi.yml
  - type: Documentation
    url: https://coasty.ai/docs
  - type: APIReference
    url: https://coasty.ai/api-docs
  - type: GettingStarted
    url: https://coasty.ai/guide?tab=api
- aid: coasty:coasty-runs-api
  name: Coasty Runs API
  description: Autonomous task runs — the agent drives a task to completion on a machine.
  humanURL: https://coasty.ai/docs
  tags:
  - Runs
  tags_raw:
  - runs
  properties:
  - type: OpenAPI
    url: openapi/coasty-runs-api-openapi.yml
  - type: Documentation
    url: https://coasty.ai/docs
  - type: APIReference
    url: https://coasty.ai/api-docs
  - type: GettingStarted
    url: https://coasty.ai/guide?tab=api
- aid: coasty:coasty-schedules-api
  name: Coasty Schedules API
  description: Cron and one-shot scheduled CUA jobs.
  humanURL: https://coasty.ai/docs
  tags:
  - Schedule
  tags_raw:
  - schedules
  properties:
  - type: OpenAPI
    url: openapi/coasty-schedules-api-openapi.yml
  - type: Documentation
    url: https://coasty.ai/docs
  - type: APIReference
    url: https://coasty.ai/api-docs
  - type: GettingStarted
    url: https://coasty.ai/guide?tab=api
- aid: coasty:coasty-sessions-api
  name: Coasty Sessions API
  description: Stateful CUA sessions with persistent trajectory.
  humanURL: https://coasty.ai/docs
  tags:
  - Sessions
  tags_raw:
  - sessions
  properties:
  - type: OpenAPI
    url: openapi/coasty-sessions-api-openapi.yml
  - type: Documentation
    url: https://coasty.ai/docs
  - type: APIReference
    url: https://coasty.ai/api-docs
  - type: GettingStarted
    url: https://coasty.ai/guide?tab=api
- aid: coasty:coasty-triggers-api
  name: Coasty Triggers API
  description: Webhook and chain triggers for schedules.
  humanURL: https://coasty.ai/docs
  tags:
  - Triggers
  tags_raw:
  - triggers
  properties:
  - type: OpenAPI
    url: openapi/coasty-triggers-api-openapi.yml
  - type: Documentation
    url: https://coasty.ai/docs
  - type: APIReference
    url: https://coasty.ai/api-docs
  - type: GettingStarted
    url: https://coasty.ai/guide?tab=api
- aid: coasty:coasty-workflows-api
  name: Coasty Workflows API
  description: Versioned, branching multi-step automations (DSL) and their runs.
  humanURL: https://coasty.ai/docs
  tags:
  - Workflows
  tags_raw:
  - workflows
  properties:
  - type: OpenAPI
    url: openapi/coasty-workflows-api-openapi.yml
  - type: Documentation
    url: https://coasty.ai/docs
  - type: APIReference
    url: https://coasty.ai/api-docs
  - type: GettingStarted
    url: https://coasty.ai/guide?tab=api
common:
- type: CapabilityMap
  url: capabilities/coasty-capability-edges.yml
  name: Coasty Business Capability Map
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/coasty/overview
- type: VulnerabilityDisclosure
  url: security/coasty-vulnerability-disclosure.yml
- type: Security
  url: https://coasty.ai/.well-known/security.txt
- type: DomainSecurity
  url: security/coasty-domain-security.yml
- type: AgenticAccess
  url: agentic-access/coasty-agentic-access.yml
- type: Authentication
  url: authentication/coasty-authentication.yml
- type: Website
  url: https://coasty.ai
- type: DeveloperPortal
  url: https://coasty.ai/docs
- type: Documentation
  url: https://coasty.ai/docs
- type: APIReference
  url: https://coasty.ai/api-docs
- type: GettingStarted
  url: https://coasty.ai/guide?tab=api
- type: Blog
  url: https://coasty.ai/blog
- type: Pricing
  url: https://coasty.ai/pricing
- type: SignUp
  url: https://coasty.ai/auth
- type: TermsOfService
  url: https://coasty.ai/terms
- type: PrivacyPolicy
  url: https://coasty.ai/privacy
- type: Support
  url: mailto:founders@coasty.ai
- type: GitHubOrganization
  url: https://github.com/coasty-ai
- type: StatusPage
  url: https://status.coasty.ai
- type: OpenAPI
  url: openapi/_original/coasty-openapi-original.json
- type: Overlay
  url: overlays/coasty-openapi-overlay.yaml
- type: LLMsTxt
  url: llms/coasty-llms.txt
- type: WellKnown
  url: well-known/coasty-well-known.yml
- type: SecurityTxt
  url: well-known/coasty-security.txt
- type: MCPServer
  url: mcp/coasty-mcp.yml
  name: Coasty Computer-Use MCP Server
  description: First-party MCP server (npx -y @coasty/mcp; remote https://api.coasty.ai/mcp) exposing 26 computer-use tools
    across predict, machines, schedules, account, and discovery groups.
- type: Packages
  url: packages/coasty-packages.yml
- type: Conventions
  url: conventions/coasty-conventions.yml
- type: Idempotency
  url: conventions/coasty-conventions.yml
- type: ErrorCatalog
  url: errors/coasty-problem-types.yml
- type: Conformance
  url: conformance/coasty-conformance.yml
- type: Lifecycle
  url: lifecycle/coasty-lifecycle.yml
- type: Deprecation
  url: lifecycle/coasty-lifecycle.yml
- type: Sandbox
  url: sandbox/coasty-sandbox.yml
- type: DataModel
  url: data-model/coasty-data-model.yml
- type: Webhooks
  url: asyncapi/coasty-webhooks.yml
- type: Plans
  url: plans/coasty-plans.yml
- type: RateLimits
  url: rate-limits/coasty-rate-limits.yml
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Coasty API — frequently asked questions

Does Coasty have an API?

Yes. APIs.io lists 8 APIs from Coasty, including Coasty Keys API, Coasty Machines API and Coasty Predict API, and 5 more.

Is there an OpenAPI specification for the Coasty API?

Yes. APIs.io indexes 8 OpenAPI specifications for Coasty, each linked for download from this page.

How do I authenticate with the Coasty API?

Coasty uses bearer-token authentication (apiKey/http · 4 schemes). The details are profiled on APIs.io as Coasty Authentication.

How much does the Coasty API cost?

Coasty publishes its prices; its Pay as you go plan is $0.05 per managed step as of 2026-10-28. APIs.io lists 3 pricing plans for Coasty, with each plan's price, limits and inclusions under Pricing on this page.

Does Coasty have an MCP server?

Yes. APIs.io lists 1 MCP server for Coasty: First-party MCP server (npx -y @coasty/mcp; remote https://api.coasty.ai/mcp) exposing 26 computer-use tools across predict, machines, schedules, account, and discovery groups.

Is the Coasty API ready for AI agents?

Coasty has a Kin Score of 63.4 out of 100 (strong) and an Agent Readiness score of 47.0 (agent-native), scored by API Evangelist on 2026-11-06.

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