MarketAux

Marketaux is a global financial and stock market news API that pairs every article with entity recognition and sentiment analysis. It aggregates 5,000+ news sources in 30+ languages, tracking 200,000+ entities — equities, indices, ETFs, mutual funds, currencies, and cryptocurrencies — across 80+ markets. Beyond filtered news feeds, it provides entity statistics time series, aggregations, and trending-entity endpoints for identifying the best and worst performing entities in the news, with a free self-serve tier.

MarketAux publishes 3 APIs on the APIs.io network: Entities API, News API, and Sources API. Tagged areas include News, Financial News, Stock Market, Sentiment Analysis, and Market Data.

MarketAux’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, support, FAQ, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub

43.6/100 developing ▬ flat Agent 28/100 agent aware saas Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessFreemiumSelf serve

1 APIs

News Financial News Stock Market Sentiment Analysis Market Data Entity Recognition Public APIs

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 43.6/100 · developing

Contract Quality 3.6 / 21

Developer Ergonomics 8.0 / 17

Access Clarity 13.0 / 17

Operational Transparency 3.5 / 11

Contract Governance 0.5 / 10

Discoverability 6.5 / 9

Regulatory Posture 7.8 / 15

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/.

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 github.com/api-evangelist/marketaux: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 3

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

MarketAux Entities API

Entity statistics, trending entities, entity search, and entity metadata.

MarketAux News API

Financial and market news feeds, similar-article lookup, and article retrieval by UUID.

MarketAux Sources API

News source metadata usable in news feed filters.

Open Collections 1

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

Marketaux API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Marketaux Plans

6 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Marketaux Rate Limits

6 limits

RATE LIMITS

Security Posture 2

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

Marketaux Authentication

apiKey · 1 scheme

SECURITY

Marketaux Domain Security

TLSv1.3 · DNSSEC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

WellKnown

LLMsTxt

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

ErrorCatalog

Conventions

Lifecycle

Conformance

DataModel

Build 2

SDKs, sample code, and the tooling you integrate with

Examples

Examples

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support

Support

FAQ

FAQ

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Overlay

Overlay

PublicAPIsListing

PublicAPIsListing

Source (apis.yml)

aid: marketaux
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: false
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/marketaux.png
name: MarketAux
description: Marketaux is a global financial and stock market news API that pairs every article with entity recognition and
  sentiment analysis. It aggregates 5,000+ news sources in 30+ languages, tracking 200,000+ entities — equities, indices,
  ETFs, mutual funds, currencies, and cryptocurrencies — across 80+ markets. Beyond filtered news feeds, it provides entity
  statistics time series, aggregations, and trending-entity endpoints for identifying the best and worst performing entities
  in the news, with a free self-serve tier.
url: https://www.marketaux.com/
specificationVersion: '0.23'
created: '2026-05-28'
modified: '2026-07-22'
x-source: public-apis/public-apis
x-category: News
x-tier: 3
x-tier-reason: bulk-registered-from-public-apis
tags:
- News
- Financial News
- Stock Market
- Sentiment Analysis
- Market Data
- Entity Recognition
- Public APIs
apis:
- aid: marketaux:marketaux-entities-api
  name: MarketAux Entities API
  description: Entity statistics, trending entities, entity search, and entity metadata.
  humanURL: https://www.marketaux.com/documentation
  baseURL: https://api.marketaux.com/v1
  tags:
  - Entities
  properties:
  - type: OpenAPI
    url: openapi/marketaux-entities-api-openapi.yml
  - type: Documentation
    url: https://www.marketaux.com/documentation
- aid: marketaux:marketaux-news-api
  name: MarketAux News API
  description: Financial and market news feeds, similar-article lookup, and article retrieval by UUID.
  humanURL: https://www.marketaux.com/documentation
  baseURL: https://api.marketaux.com/v1
  tags:
  - News
  properties:
  - type: OpenAPI
    url: openapi/marketaux-news-api-openapi.yml
  - type: Documentation
    url: https://www.marketaux.com/documentation
- aid: marketaux:marketaux-sources-api
  name: MarketAux Sources API
  description: News source metadata usable in news feed filters.
  humanURL: https://www.marketaux.com/documentation
  baseURL: https://api.marketaux.com/v1
  tags:
  - Sources
  properties:
  - type: OpenAPI
    url: openapi/marketaux-sources-api-openapi.yml
  - type: Documentation
    url: https://www.marketaux.com/documentation
common:
- type: Overlay
  url: overlays/marketaux-openapi-overlay.yaml
- type: X-MCPServerCandidate
  url: mcp/marketaux-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: Website
  url: https://www.marketaux.com/
- type: Documentation
  url: https://www.marketaux.com/documentation
- type: APIReference
  url: https://www.marketaux.com/documentation
- type: GettingStarted
  url: https://www.marketaux.com/documentation#introduction
- type: Pricing
  url: https://www.marketaux.com/pricing
- type: SignUp
  url: https://www.marketaux.com/register
- type: Login
  url: https://www.marketaux.com/login
- type: Support
  url: https://www.marketaux.com/contact
- type: FAQ
  url: https://www.marketaux.com/faq
- type: TermsOfService
  url: https://www.marketaux.com/tos
- type: PrivacyPolicy
  url: https://www.marketaux.com/privacy
- type: Authentication
  url: authentication/marketaux-authentication.yml
- type: Plans
  url: plans/marketaux-plans.yml
- type: RateLimits
  url: rate-limits/marketaux-rate-limits.yml
- type: ErrorCatalog
  url: errors/marketaux-problem-types.yml
- type: Conventions
  url: conventions/marketaux-conventions.yml
- type: Lifecycle
  url: lifecycle/marketaux-lifecycle.yml
- type: Conformance
  url: conformance/marketaux-conformance.yml
- type: DataModel
  url: data-model/marketaux-data-model.yml
- type: Examples
  url: examples/marketaux-examples.yml
- type: Packages
  url: packages/marketaux-packages.yml
- type: WellKnown
  url: well-known/marketaux-well-known.yml
- type: LLMsTxt
  url: llms/marketaux-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: DomainSecurity
  url: security/marketaux-domain-security.yml
- type: PublicAPIsListing
  url: https://github.com/public-apis/public-apis
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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