# Alpaca

**Canonical:** https://apis.io/providers/alpaca-markets/  
**Website:** https://alpaca.markets/  
**APIs profiled:** 16

Alpaca is a developer-first, commission-free brokerage that exposes stock, ETF, options, and crypto trading and market data entirely through APIs. The Trading API places and manages orders against a free paper-trading sandbox (paper-api.alpaca.markets) or a live account (api.alpaca.markets/v2); the Market Data API serves historical and real-time stocks, crypto, options, news, and corporate actions over REST plus WebSocket streams (data.alpaca.markets and stream.data.alpaca.markets); and the Broker API lets businesses open and fund end-user brokerage accounts. Authentication uses APCA-API-KEY-ID and APCA-API-SECRET-KEY headers, with OAuth2 available for third-party apps.

## Kin Score — 33.5 / 100 (thin)

Scored 2026-08-24 under rubric 0.13.0. Trend: flat (-0.4 from 33.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 61.8 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 2.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Securities & Market Data**: 10.0 (matched via tags).

## Agent readiness — 20.9 (agent-aware)

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

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (16)

- **Alpaca Market Data Streaming API** — Real-time market data over WebSocket. Stocks stream at wss://stream.data.alpaca.markets/v2/{feed} (iex, sip, delayed_sip, test) and crypto at wss://stream.data.alpaca.markets/v1...
- **Alpaca Account API** — Trading account details, configuration, and activities.
- **Alpaca Assets API** — Tradable asset catalog.
- **Alpaca Broker - Accounts API** — Open and manage end-user brokerage accounts.
- **Alpaca Broker - Funding API** — Transfers and journals between accounts.
- **Alpaca Broker - Trading API** — Place orders on behalf of end-user accounts.
- **Alpaca Market API** — Market calendar and clock.
- **Alpaca Market Data - Crypto API** — Historical and latest crypto bars, trades, quotes, and orderbooks (v1beta3).
- **Alpaca Market Data - News API** — Real-time and historical market news (v1beta1).
- **Alpaca Market Data - Options API** — Options bars, trades, and snapshots (v1beta1).
- **Alpaca Market Data - Screener API** — Most-actives and movers screeners (v1beta1).
- **Alpaca Market Data - Stocks API** — Historical and latest stock bars, trades, quotes, snapshots, and auctions.
- **Alpaca Orders API** — Submit, list, replace, and cancel orders.
- **Alpaca Portfolio API** — Portfolio history and performance.
- **Alpaca Positions API** — Open positions and liquidation.
- **Alpaca Watchlists API** — User watchlists.

## Agentic access (1)

- **Alpaca Markets Agentic Access** — 30 operations · 10 acting

## Plans (1)

- **Alpaca Markets Plans Pricing**

## Tags

Market Data, Trading, Brokerage, Stocks, Crypto, Options, FX Trading, Financial Data, Streaming, WebSocket

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