IEX Cloud

IEX Cloud was a cloud-based financial data platform from IEX Group offering market data, fundamentals, news, options, and reference APIs at https://cloud.iexapis.com/v1. The service was sunset on August 31, 2024 by IEX Group. The entry below is preserved as historical reference for migration patterns; endpoints are no longer reachable.

IEX Cloud is listed with 1 API on the APIs.io network. Tagged areas include Fintech, Market Data, Stocks, Reference, and Historical.

IEX Cloud’s developer surface includes developer portal, documentation, changelog, authentication, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

0.0/100 minimal ▬ flat Agent 0/100 human only Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 API

Fintech Market Data Stocks Reference Historical Defunct

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 0.0/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 0.0 / 9

Regulatory Posture 1.7 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 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 0 / 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 Securities & Market Data 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Developer Ergonomics scores 0.0 — up to +20.0 composite points Ask about this →
Access Clarity scores 0.0 — up to +20.0 composite points Ask about this →

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.

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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/iex-cloud/apis.yml: open an issue on github.com/api-evangelist/iex-cloud 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 →

APIs 1

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

IEX Cloud Core Data API (sunset)

Real-time and historical US equity quotes, intraday and historical prices, OHLCV charts, news, dividends, splits, options chains, fundamentals, and corporate actions. Pricing wa...

IEX Cloud API pricing

Not yet checked against IEX Cloud's own pricing page. Compiled by API Evangelist on 2026-05-08 from web.archive.org/web/20240501000000*/iexcloud.io/pricing; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Launch (sunset) freemium	Free
Grow (sunset) subscription	$9.00 per monthly subscription / month · Free
Scale (sunset) subscription	$199.00 per monthly subscription / month · Free
Business (sunset) subscription	$999.00 per monthly subscription / month · Free

Plan details, limits and sources →

Rate limits

Concurrent requests (sunset): 50 concurrent connections
Per-second cap (Launch, sunset): 100 requests per second
Monthly message allowance: unlimited messages per month

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

Pricing Plans 1

Published pricing tiers and plan structures.

IEX Cloud Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

IEX Cloud Rate Limits

3 limits

RATE LIMITS

Deprecation Policy 1

Notice periods, support windows and the headers it sends, quoted from its own page.

IEX Cloud

2 quoted statements, read from IEX Cloud's own page on 2026-11-09.

DEPRECATION

FinOps 1

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

IEX Cloud Finops

FINOPS

Security Posture 2

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

IEX Cloud Authentication

apiKey · 2 schemes

SECURITY

IEX Cloud Domain Security

TLSv1.3

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 5

Status, limits, changes, and where to get help

StatusPage

Deprecation

ChangeLog

RateLimits

DeprecationSchedule

DeprecationSchedule

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

Sunset Notice

Sunset Notice

Source (apis.yml)

aid: iex-cloud
url: https://raw.githubusercontent.com/api-evangelist/iex-cloud/refs/heads/main/apis.yml
name: IEX Cloud
kind: company
x-status: defunct
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - 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: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/iex-cloud.png
tags:
- Fintech
- Market Data
- Stocks
- Reference
- Historical
- Defunct
created: '2026-05-08'
modified: '2026-09-16'
specificationVersion: '0.23'
description: IEX Cloud was a cloud-based financial data platform from IEX Group offering market data, fundamentals, news,
  options, and reference APIs at https://cloud.iexapis.com/v1. The service was sunset on August 31, 2024 by IEX Group. The
  entry below is preserved as historical reference for migration patterns; endpoints are no longer reachable.
notes: IEX Cloud sunset on 2024-08-31. APIs are no longer reachable. Migrate to alternatives such as Polygon.io, Tiingo, Alpha
  Vantage, or Finnhub. As of 2026-07-22 the iexcloud.io domain has lapsed out of IEX Group's control (www.iexcloud.io serves
  a Namecheap parking page) - iexcloud.io links below are historical citations, not live provider content. The github.com/iexcloud
  org (docs + SDKs) and status.iexapis.com remain live.
apis:
- aid: iex-cloud:core-data-api
  name: IEX Cloud Core Data API (sunset)
  tags:
  - Stocks
  - Market Data
  - Sunset
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://cloud.iexapis.com/v1
  humanURL: https://iexcloud.io/docs/api
  description: 'Real-time and historical US equity quotes, intraday and historical prices, OHLCV charts, news, dividends,
    splits, options chains, fundamentals, and corporate actions. Pricing was message-based: each endpoint cost a number of
    "credits" against a monthly allowance. SUNSET August 31, 2024.'
  properties:
  - type: Documentation
    url: https://iexcloud.io/docs/api
  - type: Sunset Notice
    url: https://iexcloud.io/community/blog/iex-cloud-end-of-life-announcement
  x-features:
  - Real-time and historical quotes (sunset)
  - Fundamentals and corporate actions (sunset)
  - News, options, splits, dividends (sunset)
  - Message-based credit pricing (sunset)
  x-use-cases:
  - Historical reference only
  - Migration patterns to successor providers
common:
- type: Website
  url: https://iexcloud.io
- type: DomainSecurity
  url: security/iex-cloud-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/iexcloud
- type: LinkedIn
  url: https://www.linkedin.com/showcase/iex-cloud
- type: Portal
  url: https://www.iexcloud.io/
- type: Sunset Notice
  url: https://iexcloud.io/community/blog/iex-cloud-end-of-life-announcement
- type: Documentation
  url: https://web.archive.org/web/20241003164023/https://iexcloud.io/docs/api/
- type: Lifecycle
  url: lifecycle/iex-cloud-lifecycle.yml
- type: StatusPage
  url: https://status.iexapis.com/
- type: Deprecation
  url: https://web.archive.org/web/20240611120824/https://iexcloud.io/docs/api-basics/deprecation
- type: ChangeLog
  url: changelog/iex-cloud-changelog.yml
- type: Authentication
  url: authentication/iex-cloud-authentication.yml
- type: Packages
  url: packages/iex-cloud-packages.yml
- type: SDKs
  url: packages/iex-cloud-packages.yml
- type: WellKnown
  url: well-known/iex-cloud-well-known.yml
- type: LLMsTxt
  url: llms/iex-cloud-llms.txt
- type: Plans
  url: plans/iex-cloud-plans-pricing.yml
- type: RateLimits
  url: rate-limits/iex-cloud-rate-limits.yml
- type: FinOps
  url: finops/iex-cloud-finops.yml
- type: DeprecationSchedule
  url: deprecation/iex-cloud-deprecation-policy.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

IEX Cloud API — frequently asked questions

Does IEX Cloud have an API?

Yes. APIs.io lists 1 API from IEX Cloud, including IEX Cloud Core Data API (sunset).

How do I authenticate with the IEX Cloud API?

IEX Cloud uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as IEX Cloud Authentication.

How much does the IEX Cloud API cost?

APIs.io lists 4 pricing plans for IEX Cloud, with each plan's price, limits and inclusions under Pricing on this page.

Is the IEX Cloud API ready for AI agents?

IEX Cloud has a Kin Score of 0.0 out of 100 (minimal) and an Agent Readiness score of 0.0 (human-only), scored by API Evangelist on 2026-11-13.

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