Fly Io

Documentation and guides from the team at Fly.io.

Fly Io publishes 14 API contracts indexed on the APIs.io network, including Fly.io Machines API, Fly.io Extensions API, fly-io Apps API, and 11 more. Tagged areas include Platform, Infrastructure, Edge Computing, Networking, and Hosting.

The Fly Io catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 2 Spectral governance rulesets.

Fly Io’s developer surface includes authentication, engineering blog, and 14 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

41.2/100 developing ▬ flat Agent 36/100 agent ready Front door AI 4/6 moderate Heartbeat 80/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 16 Features

Platform Infrastructure Edge Computing Networking Hosting Deployment Serverless

What this lets a business do 1

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

Information Technology Management

BC-600

AppsMachinesVolumes

POST /v1/apps/{app_name}/machines POST /v1/apps/{app_name}/machines/{machine_id}/start POST /v1/apps/{app_name}/machines/{machine_id}/stop POST /v1/apps/{app_name}/volumes

Kin Score

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

Composite quality — 41.2/100 · developing

Contract Quality 12.4 / 19

Developer Ergonomics 3.6 / 15

Access Clarity 2.4 / 15

Operational Transparency 2.1 / 10

Contract Governance 1.2 / 9

Discoverability 3.9 / 8

Regulatory Posture 4.1 / 15

Create-or-Update Ergonomics 6.1 / 10

Agent readiness — 36/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 0 / 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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
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)
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs

6 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 15.8 — up to +16.8 composite points
Developer Ergonomics scores 23.8 — up to +15.2 composite points
Contract Governance scores 13.6 — up to +10.4 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/fly-io/apis.yml: open an issue on github.com/api-evangelist/fly-io 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.

Market	Position	Depth	Registered MCP server	Declares compatibility
Network Edge (CDN, networking, peering, edge compute)	mixed	38.9	-	-
Stripe App Marketplace and Partner Ecosystem (builders on Stripe)	mixed	38.9	-	-
Raycast Store Extensions (first-party publishers + community-wrapped products)	mixed	38.9	-	-

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 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 14

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

Fly.io Machines API

The Fly.io Machines API is a low-level REST interface for provisioning and managing Fly Machines, which are fast-booting virtual machines that run on Fly.io's global edge infras...

Fly.io GraphQL API

The Fly.io GraphQL API provides a programmatic interface for managing Fly.io platform resources including applications, IP address allocations, organizations, and networking con...

Fly.io Extensions API

The Fly.io Extensions API is a provider-facing HTTP interface that enables third-party services to integrate with the Fly.io platform as extension providers. When a Fly.io user ...

fly-io Apps API

Operations for creating, listing, and deleting Fly Apps. Every Fly Machine belongs to a Fly App, which groups related Machines together.

fly-io SSO API

Single sign-on operations allowing Fly.io users to access provider dashboards using their Fly.io credentials via OAuth.

fly-io Tokens API

Operations for requesting OpenID Connect (OIDC) tokens from third-party services, enabling Fly Machines to authenticate to external systems using workload identity.

fly-io Volumes API

Operations for managing persistent storage volumes that can be attached to Fly Machines. Volumes provide durable block storage that persists across Machine restarts.

fly-io Webhooks API

Webhook endpoints for bidirectional event delivery between Fly.io and extension providers. Both sides sign their webhook payloads using HMAC-SHA256 for verification.

Fly Io O Auth API

Fly.io platform OAuth endpoints used during the single sign-on flow to authorize users and exchange tokens.

Fly Io Organizations API

The Organizations API from Fly Io — 2 operation(s) for organizations.

Fly Io Platform API

The Platform API from Fly Io — 2 operation(s) for platform.

Fly Io Postgres Clusters API

Create and manage Postgres clusters, including databases, users, extensions, backups, and app attachments.

Fly Io Secrets API

The Secrets API from Fly Io — 9 operation(s) for secrets.

Fly Io TLS Certificates API

This site hosts documentation generated from the Fly.io Machines API OpenAPI specification. Visit our complete [Machines API docs](https://fly.io/docs/machines/api/certificates-...

Scroll for all 14

Fly.io Extensions Apps Webhooks API

OPEN COLLECTION

Scroll for all 8

GraphQL 1

GraphQL schemas published by this provider.

fly-io GraphQL API

The Fly.io GraphQL API provides a programmatic interface for managing Fly.io platform resources including applications, IP address allocations, organizations, and networking con...

GRAPHQL

Fly Io API pricing

Not yet checked against Fly Io's own pricing page. Compiled by API Evangelist on 2026-05-04 from fly.io/docs/about/pricing/; confirm before you rely on a figure.

Plan	Price
Shared CPU Machines usage-based	—
Performance CPU Machines usage-based	—
Stopped Machines (rootfs) metered	$0.15 per per GB-30days
Fly Volumes metered	$0.15 per per GB-month
Volume Snapshots metered	$0.08 per per GB-month
Data Transfer metered	—
Machine Reservation Blocks subscription	—
Fly Kubernetes (FKS) subscription	$75.00 per per cluster / month

Plan details, limits and sources →

Rate limits

Machines API: default; raise via support requests per minute
Machines per app: varies by org limits machines
Concurrent machine starts: varies concurrent

Compiled by API Evangelist, not yet checked against Fly Io's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Fly Io Plans Pricing

8 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Fly Io Rate Limits

3 limits

RATE LIMITS

Service Levels 1

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

Fly Io

SLA

FinOps 1

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

Fly Io Finops

FINOPS

Features 16

Notable capabilities this provider offers.

Shared CPU machines: shared-cpu-1x to 8x with 256MB-16GB RAM

Performance CPU machines: performance-1x to 16x with 2GB-128GB RAM

Per-second billing while machines run

Stopped machines: $0.15/GB rootfs per 30 days

Volumes: $0.15/GB/month persistent storage

Snapshots: $0.08/GB/month (10 GB free)

Egress: $0.02-$0.12/GB (region-grouped)

Dedicated IPv4: $2/month; unlimited Anycast IPv6 free

Managed SSL: $0.10/single, $1/wildcard

Machine Reservation Blocks: 40% compute discount with annual commit

Fly Kubernetes (FKS): $75/cluster/month + underlying resources

Static Egress IPs: $0.005/hour (~$3.60/mo)

Machines API for programmatic instance management

Anycast routing for global load balancing

Postgres, Redis, Upstash add-on services

WireGuard mesh for private networking

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Event Specifications 1

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

Fly.io Extensions Webhook Events

The Fly.io Extensions webhook system delivers real-time event notifications in both directions between Fly.io and extension providers. Fly.io sends CloudEvents-format payloads t...

ASYNCAPI

Semantic Vocabularies 1

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

Fly Io Context

0 classes · 11 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Fly Io — asyncapi rules

7 rules · 1 errors 6 warnings

SPECTRAL

Fly Io — jsonschema rules

6 rules · 5 warnings 1 info

SPECTRAL

16 properties

JSON SCHEMA

VolumeSnapshot

5 properties

JSON SCHEMA

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JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Fly Io Structure

0 properties

JSON STRUCTURE

Security Posture 4

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

Fly Io Authentication

apiKey/http · 2 schemes

SECURITY

Fly Io Domain Security

TLSv1.3 · DMARC

SECURITY

Fly Io Vulnerability Disclosure

no policy recorded

SECURITY

Fly Io Trust Center

SOC 2, ISO 27001

SECURITY

Agentic Access 1

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

Fly Io Agentic Access

37 operations · 24 acting · 1 human-in-the-loop

37 operations · 24 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

JSONSchema

JSONSchema

JSONSchema

JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

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 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

name: Fly Io
aid: fly-io
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
specificationVersion: '0.23'
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fly-io.png
url: https://raw.githubusercontent.com/api-evangelist/fly-io/refs/heads/main/apis.yml
apis:
- aid: fly-io:machines-api
  name: Fly.io Machines API
  tags:
  - Deployment
  - Edge Computing
  - Infrastructure
  - Platform
  - Virtual Machines
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.machines.dev
  humanURL: https://fly.io/docs/machines/api/
  properties:
  - url: https://fly.io/docs/machines/api/
    type: Documentation
  - url: https://fly.io/docs/machines/api/working-with-machines-api/
    type: Documentation
  - url: openapi/fly-io-machines-api-openapi.yml
    type: OpenAPI
  description: The Fly.io Machines API is a low-level REST interface for provisioning and managing Fly Machines, which are
    fast-booting virtual machines that run on Fly.io's global edge infrastructure. It provides endpoints for creating, starting,
    stopping, and destroying Machines, as well as managing Fly Apps, Fly Volumes, and TLS certificates. The API is accessible
    publicly at https://api.machines.dev or internally within the Fly.io private WireGuard network at http://_api.internal:4280.
- aid: fly-io:graphql-api
  name: Fly.io GraphQL API
  tags:
  - Deployment
  - GraphQL
  - Infrastructure
  - Networking
  - Platform
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.fly.io/graphql
  humanURL: https://api.fly.io/graphql
  properties:
  - url: https://api.fly.io/graphql
    type: Documentation
  - url: graphql/fly-io-graphql.md
    type: GraphQL
  description: The Fly.io GraphQL API provides a programmatic interface for managing Fly.io platform resources including applications,
    IP address allocations, organizations, and networking configuration. The endpoint is available at https://api.fly.io/graphql
    and includes an interactive GraphiQL explorer with schema introspection and documentation tabs accessible directly in
    the browser. Authentication requires an Authorization Bearer token, which can be obtained by running `flyctl auth token`.
- aid: fly-io:extensions-api
  name: Fly.io Extensions API
  tags:
  - Extensions
  - Integration
  - Partners
  - Platform
  - Provisioning
  tags_raw:
  - Extensions
  - Integration
  - Partner
  - Platform
  - Provisioning
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api.example.com
  humanURL: https://fly.io/docs/reference/extensions_api/
  properties:
  - url: https://fly.io/docs/reference/extensions_api/
    type: Documentation
  - url: https://fly.io/docs/about/extensions/
    type: Documentation
  - url: openapi/fly-io-extensions-api-openapi.yml
    type: OpenAPI
  - url: asyncapi/fly-io-extensions-webhooks-asyncapi.yml
    type: AsyncAPI
  description: The Fly.io Extensions API is a provider-facing HTTP interface that enables third-party services to integrate
    with the Fly.io platform as extension providers. When a Fly.io user provisions an extension via the flyctl CLI, Fly.io
    forwards the provisioning request to the provider's API with details about the requesting organization, and the provider
    responds with environment variable configuration that is attached to the target application.
- aid: fly-io:fly-io-apps-api
  name: fly-io Apps API
  description: Operations for creating, listing, and deleting Fly Apps. Every Fly Machine belongs to a Fly App, which groups
    related Machines together.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - Application
  tags_raw:
  - Apps
  properties:
  - type: OpenAPI
    url: openapi/fly-io-apps-api-openapi.yml
- aid: fly-io:fly-io-sso-api
  name: fly-io SSO API
  description: Single sign-on operations allowing Fly.io users to access provider dashboards using their Fly.io credentials
    via OAuth.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - SSO
  properties:
  - type: OpenAPI
    url: openapi/fly-io-sso-api-openapi.yml
- aid: fly-io:fly-io-tokens-api
  name: fly-io Tokens API
  description: Operations for requesting OpenID Connect (OIDC) tokens from third-party services, enabling Fly Machines to
    authenticate to external systems using workload identity.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - Tokens
  properties:
  - type: OpenAPI
    url: openapi/fly-io-tokens-api-openapi.yml
- aid: fly-io:fly-io-volumes-api
  name: fly-io Volumes API
  description: Operations for managing persistent storage volumes that can be attached to Fly Machines. Volumes provide durable
    block storage that persists across Machine restarts.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - Volumes
  properties:
  - type: OpenAPI
    url: openapi/fly-io-volumes-api-openapi.yml
- aid: fly-io:fly-io-webhooks-api
  name: fly-io Webhooks API
  description: Webhook endpoints for bidirectional event delivery between Fly.io and extension providers. Both sides sign
    their webhook payloads using HMAC-SHA256 for verification.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/fly-io-webhooks-api-openapi.yml
- aid: fly-io:fly-io-oauth-api
  name: Fly Io O Auth API
  description: Fly.io platform OAuth endpoints used during the single sign-on flow to authorize users and exchange tokens.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - OAuth
  - Authentication
  tags_raw:
  - OAuth
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/fly-io-oauth-api-openapi.yml
- aid: fly-io:fly-io-organizations-api
  name: Fly Io Organizations API
  description: The Organizations API from Fly Io — 2 operation(s) for organizations.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - Organization
  tags_raw:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/fly-io-organizations-api-openapi.yml
- aid: fly-io:fly-io-platform-api
  name: Fly Io Platform API
  description: The Platform API from Fly Io — 2 operation(s) for platform.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - Platform
  properties:
  - type: OpenAPI
    url: openapi/fly-io-platform-api-openapi.yml
- aid: fly-io:fly-io-postgres-clusters-api
  name: Fly Io Postgres Clusters API
  description: Create and manage Postgres clusters, including databases, users, extensions, backups, and app attachments.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - Postgres Clusters
  properties:
  - type: OpenAPI
    url: openapi/fly-io-postgres-clusters-api-openapi.yml
- aid: fly-io:fly-io-secrets-api
  name: Fly Io Secrets API
  description: The Secrets API from Fly Io — 9 operation(s) for secrets.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - Secrets
  properties:
  - type: OpenAPI
    url: openapi/fly-io-secrets-api-openapi.yml
- aid: fly-io:fly-io-tls-certificates-api
  name: Fly Io TLS Certificates API
  description: This site hosts documentation generated from the Fly.io Machines API OpenAPI specification. Visit our complete
    [Machines API docs](https://fly.io/docs/machines/api/certificates-resource/) for details about using the TLS Certificates
    resource.
  humanURL: https://fly.io/docs/machines/api/
  baseURL: https://api.machines.dev
  tags:
  - TLS Certificates
  properties:
  - type: OpenAPI
    url: openapi/fly-io-tls-certificates-api-openapi.yml
common:
- type: Plans
  url: plans/fly-io-plans-pricing.yml
- type: RateLimits
  url: rate-limits/fly-io-rate-limits.yml
- type: FinOps
  url: finops/fly-io-finops.yml
- type: CapabilityMap
  url: capabilities/fly-io-capability-edges.yml
  name: Fly Io Business Capability Map
- type: Website
  url: https://fly.io
- type: AgenticAccess
  url: agentic-access/fly-io-agentic-access.yml
- type: TrustCenter
  url: security/fly-io-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/fly-io-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/fly-io-domain-security.yml
- type: Authentication
  url: authentication/fly-io-authentication.yml
- type: GitHubOrganization
  url: https://github.com/superfly
- type: LinkedIn
  url: https://www.linkedin.com/company/fly-io
- type: JSONSchema
  url: json-schema/fly-io-machine-schema.json
- type: JSONSchema
  url: json-schema/fly-io-volume-schema.json
- type: JSONLD
  url: json-ld/fly-io-context.jsonld
- url: https://fly.io/blog/feed.xml
  type: Blog
- type: Features
  data:
  - 'Shared CPU machines: shared-cpu-1x to 8x with 256MB-16GB RAM'
  - 'Performance CPU machines: performance-1x to 16x with 2GB-128GB RAM'
  - Per-second billing while machines run
  - 'Stopped machines: $0.15/GB rootfs per 30 days'
  - 'Volumes: $0.15/GB/month persistent storage'
  - 'Snapshots: $0.08/GB/month (10 GB free)'
  - 'Egress: $0.02-$0.12/GB (region-grouped)'
  - 'Dedicated IPv4: $2/month; unlimited Anycast IPv6 free'
  - 'Managed SSL: $0.10/single, $1/wildcard'
  - 'Machine Reservation Blocks: 40% compute discount with annual commit'
  - 'Fly Kubernetes (FKS): $75/cluster/month + underlying resources'
  - 'Static Egress IPs: $0.005/hour (~$3.60/mo)'
  - Machines API for programmatic instance management
  - Anycast routing for global load balancing
  - Postgres, Redis, Upstash add-on services
  - WireGuard mesh for private networking
  sources:
  - https://fly.io/docs/about/pricing/
  updated: '2026-05-04'
modified: '2026-09-16'
description: Documentation and guides from the team at Fly.io.
tags:
- Platform
- Infrastructure
- Edge Computing
- Networking
- Hosting
- Deployment
- Serverless

Fly Io API — frequently asked questions

Does Fly Io have an API?

Yes. APIs.io lists 14 APIs from Fly Io, including Fly.io Machines API, Fly.io GraphQL API and Fly.io Extensions API, and 11 more.

Is there an OpenAPI specification for the Fly Io API?

Yes. APIs.io indexes 13 OpenAPI specifications for Fly Io, each linked for download from this page.

How do I authenticate with the Fly Io API?

Fly Io uses bearer-token authentication (apiKey/http · 2 schemes). The details are profiled on APIs.io as Fly Io Authentication.

How much does the Fly Io API cost?

APIs.io lists 8 pricing plans for Fly Io, with each plan's price, limits and inclusions under Pricing on this page.

Is the Fly Io API ready for AI agents?

Fly Io has a Kin Score of 41.2 out of 100 (developing) and an Agent Readiness score of 35.6 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

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

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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.
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curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/fly-io/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/fly-io/evidence"

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