Marketstack

Marketstack is a real-time, intraday, and historical stock market data API from APILayer, delivering JSON data for tickers across 70+ global stock exchanges. The REST API covers end-of-day and intraday prices, real-time stock prices, splits, dividends, commodities, company ratings, market indexes, bonds, ETF holdings, currencies, timezones, and SEC EDGAR company filings and facts, all authenticated with a simple access_key query parameter.

Marketstack publishes 15 APIs on the APIs.io network, including Bonds API, Commodities API, Company Ratings API, and 12 more. Tagged areas include Finance, Stock Market, Market Data, End-of-Day Data, and Intraday Data.

Marketstack’s developer surface includes documentation, API reference, getting-started guide, support, pricing, signup flow, engineering blog, and 22 more developer resources.

🌐 Visit website 📡 Source on GitHub

55.6/100 strong ▬ flat Agent 29/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumFree trial

1 APIs 1 MCP Servers

Finance Stock Market Market Data End-of-Day Data Intraday Data Commodities Bonds ETFsSEC EDGARDividends

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 55.6/100 · strong

Contract Quality 9.9 / 21

Developer Ergonomics 10.2 / 17

Access Clarity 13.0 / 17

Operational Transparency 5.2 / 11

Contract Governance 0.5 / 10

Discoverability 6.5 / 9

Regulatory Posture 7.8 / 15

Agent readiness — 29/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 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 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/marketstack: 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 15

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

Marketstack Bonds API

The Bonds API from Marketstack — 2 operation(s) for bonds.

Marketstack Commodities API

The Commodities API from Marketstack — 2 operation(s) for commodities.

Marketstack Company Ratings API

The Company Ratings API from Marketstack — 1 operation(s) for company ratings.

Marketstack Currencies API

The Currencies API from Marketstack — 1 operation(s) for currencies.

Marketstack Dividends API

The Dividends API from Marketstack — 1 operation(s) for dividends.

Marketstack EDGAR API

The EDGAR API from Marketstack — 6 operation(s) for edgar.

Marketstack End Of Day API

The End-of-day API from Marketstack — 3 operation(s) for end-of-day.

Marketstack ET Fs API

The ETFs API from Marketstack — 2 operation(s) for etfs.

Marketstack Exchanges API

The Exchanges API from Marketstack — 9 operation(s) for exchanges.

Marketstack Indexes API

The Indexes API from Marketstack — 2 operation(s) for indexes.

Marketstack Intraday API

The Intraday API from Marketstack — 3 operation(s) for intraday.

Marketstack Splits API

The Splits API from Marketstack — 1 operation(s) for splits.

Marketstack Stock Prices API

The Stock Prices API from Marketstack — 1 operation(s) for stock prices.

Marketstack Tickers API

The Tickers API from Marketstack — 10 operation(s) for tickers.

Marketstack Timezones API

The Timezones API from Marketstack — 1 operation(s) for timezones.

Scroll for all 15

Open Collections 1

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

Marketstack API v2

OPEN COLLECTION

MCP Servers 1

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

marketstack (community)

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Marketstack Plans

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Marketstack Rate Limits

5 limits

RATE LIMITS

Security Posture 2

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

Marketstack Authentication

apiKey · 1 scheme

SECURITY

Marketstack Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Build 2

SDKs, sample code, and the tooling you integrate with

Postman

Postman

Packages

Packages

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

PublicAPIsListing

PublicAPIsListing

Overlay

Overlay

Source (apis.yml)

aid: marketstack
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-service
  trial: true
  try_now: false
  public: true
  label: Freemium
  confidence: high
  source:
  - https://marketstack.com/pricing
  - https://marketstack.com/signup/free
  generated: '2026-07-22'
  method: searched
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/marketstack.png
name: Marketstack
description: Marketstack is a real-time, intraday, and historical stock market data API from APILayer, delivering JSON data
  for tickers across 70+ global stock exchanges. The REST API covers end-of-day and intraday prices, real-time stock prices,
  splits, dividends, commodities, company ratings, market indexes, bonds, ETF holdings, currencies, timezones, and SEC EDGAR
  company filings and facts, all authenticated with a simple access_key query parameter.
url: https://marketstack.com
specificationVersion: '0.23'
created: '2026-05-28'
modified: '2026-07-22'
x-source: public-apis/public-apis
x-category: Finance
x-tier: 3
x-tier-reason: bulk-registered-from-public-apis
tags:
- Finance
- Stock Market
- Market Data
- End-of-Day Data
- Intraday Data
- Commodities
- Bonds
- ETFs
- SEC EDGAR
- Dividends
apis:
- aid: marketstack:marketstack-bonds-api
  name: Marketstack Bonds API
  description: The Bonds API from Marketstack — 2 operation(s) for bonds.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Bonds
  properties:
  - type: OpenAPI
    url: openapi/marketstack-bonds-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-commodities-api
  name: Marketstack Commodities API
  description: The Commodities API from Marketstack — 2 operation(s) for commodities.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Commodities
  properties:
  - type: OpenAPI
    url: openapi/marketstack-commodities-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-company-ratings-api
  name: Marketstack Company Ratings API
  description: The Company Ratings API from Marketstack — 1 operation(s) for company ratings.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Company Ratings
  properties:
  - type: OpenAPI
    url: openapi/marketstack-company-ratings-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-currencies-api
  name: Marketstack Currencies API
  description: The Currencies API from Marketstack — 1 operation(s) for currencies.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Currency
  tags_raw:
  - Currencies
  properties:
  - type: OpenAPI
    url: openapi/marketstack-currencies-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-dividends-api
  name: Marketstack Dividends API
  description: The Dividends API from Marketstack — 1 operation(s) for dividends.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Dividends
  properties:
  - type: OpenAPI
    url: openapi/marketstack-dividends-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-edgar-api
  name: Marketstack EDGAR API
  description: The EDGAR API from Marketstack — 6 operation(s) for edgar.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - EDGAR
  properties:
  - type: OpenAPI
    url: openapi/marketstack-edgar-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-end-of-day-api
  name: Marketstack End Of Day API
  description: The End-of-day API from Marketstack — 3 operation(s) for end-of-day.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - End of Day
  tags_raw:
  - End-of-day
  properties:
  - type: OpenAPI
    url: openapi/marketstack-end-of-day-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-etfs-api
  name: Marketstack ET Fs API
  description: The ETFs API from Marketstack — 2 operation(s) for etfs.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - ETFs
  properties:
  - type: OpenAPI
    url: openapi/marketstack-etfs-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-exchanges-api
  name: Marketstack Exchanges API
  description: The Exchanges API from Marketstack — 9 operation(s) for exchanges.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Exchanges
  properties:
  - type: OpenAPI
    url: openapi/marketstack-exchanges-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-indexes-api
  name: Marketstack Indexes API
  description: The Indexes API from Marketstack — 2 operation(s) for indexes.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Indexes
  properties:
  - type: OpenAPI
    url: openapi/marketstack-indexes-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-intraday-api
  name: Marketstack Intraday API
  description: The Intraday API from Marketstack — 3 operation(s) for intraday.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Intraday
  properties:
  - type: OpenAPI
    url: openapi/marketstack-intraday-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-splits-api
  name: Marketstack Splits API
  description: The Splits API from Marketstack — 1 operation(s) for splits.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Split
  tags_raw:
  - Splits
  properties:
  - type: OpenAPI
    url: openapi/marketstack-splits-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-stock-prices-api
  name: Marketstack Stock Prices API
  description: The Stock Prices API from Marketstack — 1 operation(s) for stock prices.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Stock Prices
  properties:
  - type: OpenAPI
    url: openapi/marketstack-stock-prices-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-tickers-api
  name: Marketstack Tickers API
  description: The Tickers API from Marketstack — 10 operation(s) for tickers.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Tickers
  properties:
  - type: OpenAPI
    url: openapi/marketstack-tickers-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
- aid: marketstack:marketstack-timezones-api
  name: Marketstack Timezones API
  description: The Timezones API from Marketstack — 1 operation(s) for timezones.
  humanURL: https://marketstack.com
  baseURL: https://api.marketstack.com/v2
  tags:
  - Timezones
  properties:
  - type: OpenAPI
    url: openapi/marketstack-timezones-api-openapi.yml
  - type: Documentation
    url: https://docs.apilayer.com/marketstack/docs/api-documentation
  - type: APIReference
    url: https://marketstack.com/documentation_v2
  - type: ToolCrosswalk
    url: mcp/marketstack-tool-crosswalk.yml
common:
- type: Website
  url: https://marketstack.com
- type: DeveloperPortal
  url: https://docs.apilayer.com/marketstack
- type: Documentation
  url: https://docs.apilayer.com/marketstack/docs/api-documentation
- type: APIReference
  url: https://marketstack.com/documentation_v2
- type: GettingStarted
  url: https://marketstack.com/quickstart
- type: Support
  url: https://marketstack.com/contact
- type: Pricing
  url: https://marketstack.com/pricing
- type: SignUp
  url: https://marketstack.com/signup/free
- type: Login
  url: https://marketstack.com/login
- type: TermsOfService
  url: https://marketstack.com/terms
- type: PrivacyPolicy
  url: https://marketstack.com/privacy
- type: StatusPage
  url: https://status.marketstack.com
- type: Postman
  url: https://www.postman.com/apilayer
- type: Blog
  url: https://blog.apilayer.com/feed/
- type: PublicAPIsListing
  url: https://github.com/public-apis/public-apis
- type: DomainSecurity
  url: security/marketstack-domain-security.yml
- type: Packages
  url: packages/marketstack-packages.yml
- type: MCPServer
  url: mcp/marketstack-mcp.yml
- type: LLMsTxt
  url: llms/marketstack-llms.txt
- type: Overlay
  url: overlays/marketstack-v2-overlay.yaml
- type: Conformance
  url: conformance/marketstack-conformance.yml
- type: ErrorCatalog
  url: errors/marketstack-problem-types.yml
- type: Lifecycle
  url: lifecycle/marketstack-lifecycle.yml
- type: Authentication
  url: authentication/marketstack-authentication.yml
- type: Conventions
  url: conventions/marketstack-conventions.yml
- type: DataModel
  url: data-model/marketstack-data-model.yml
- type: RateLimits
  url: rate-limits/marketstack-rate-limits.yml
- type: Plans
  url: plans/marketstack-plans.yml
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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