# Marketstack

**Canonical:** https://apis.io/providers/marketstack/  
**Website:** https://marketstack.com  
**APIs profiled:** 1

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.

## Kin Score — 57.1 / 100 (strong)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 57.1).

| Facet | Score |
|---|---|
| Discoverability | 83.3 |
| Contract Quality | 45.5 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 47.4 |
| Developer Ergonomics | 57.7 |
| Commercial Clarity | 76.3 |
| Access Clarity | 76.3 |

Regulatory layer — **Securities & Market Data**: 51.7 (matched via tags).

## Agent readiness — 42.4 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | na |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: yes (confidence: high).

## APIs (1)

- **Marketstack API v2** — Real-time, intraday and historical market data API with 45 endpoints spanning end-of-day bars, intraday bars, real-time stock prices, commodities, company ratings, splits, divid...

## MCP servers (1)

- **marketstack (community)**

## Security (2)

- **Marketstack Authentication** — apiKey · 1 scheme
- **Marketstack Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Marketstack Plans**

## Tags

Finance, Stock Market, Market Data, End-of-Day Data, Intraday Data, Commodities, Bonds, ETFs, SEC EDGAR, Dividends

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/marketstack/). Scores are computed from the provider's own public artifacts under a published rubric.