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A stock market data API for people who would rather build with data than spend all day preparing it. REST and JSON, WebSocket, flat files and MCP, documented end to end.

Start with the quickstart Read the API docs
A request is all it takescURL
curl --fail-with-body --request GET \
  'https://api.ohlc.io/v1/eod?symbols=XNAS%3AAAPL&from=2026-09-18&to=2026-09-25' \
  --header "Authorization: Bearer $OHLC_API_KEY"
Sample request. The Free plan needs no credit card.

From first look
to first response.

Quickstart

Get oriented with a request and an example response.

API reference

Understand the implemented parameters and response schema.

Documentation

Browse API guides, endpoints, and example responses.

Integration notes

Plan for authentication, failures, and usage constraints.

LLMs

Give your assistant API context, schemas, and examples.

Machine-readable,
end to end.

OpenAPI specification

The complete contract: every parameter, schema and error.

Postman collection

Live example requests for Postman, Bruno and Insomnia.

llms.txt

An index of the docs for coding assistants and AI search.

MCP server

Query data and the docs from Claude and other MCP clients.

Use it where
you already work.

Python

Requests, pagination and a pandas DataFrame from daily bars.

JavaScript

Server-side fetch, pagination and streaming.

Excel & Google Sheets

Prices in a spreadsheet as CSV.

Claude & ChatGPT

Stock data inside your AI assistant over MCP.

A little JSON.
A lot of possibility.

Explore the API