Authentication - NorthAxium Data

All REST API /api/v1/* endpoints require an API key passed in the X-API-Key request header. The hosted MCP server uses OAuth instead of API keys. Connect it from ChatGPT, Claude, Cursor, or another remote MCP client with https://mcp.northaxiumdata.ca/mcp.

import requests

headers = {"X-API-Key": "your_api_key_here"}
response = requests.get(
    "https://api.northaxiumdata.ca/api/v1/contracts",
    headers=headers
)

const response = await fetch("https://api.northaxiumdata.ca/api/v1/contracts", {
  headers: { "X-API-Key": "your_api_key_here" }
});

curl -H "X-API-Key: your_api_key_here" \
  https://api.northaxiumdata.ca/api/v1/contracts

API tiers

Tier	Price	Monthly quota	Daily limit	Burst limit	MCP access
Free	$0	100	25/day	5/min	Hosted OAuth MCP included
Developer	$29 CAD / mo	10,000	1,000/day	30/min	Hosted OAuth MCP included
Pro	$99 CAD / mo	100,000	10,000/day	120/min	Hosted OAuth MCP included
Enterprise	Custom	Custom	Custom	Custom	Hosted OAuth MCP included

Error responses

Status	Code	Meaning
`401`	`UNAUTHORIZED`	Missing or invalid API key
`429`	`RATE_LIMITED`	Monthly quota, daily limit, or burst limit exceeded

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Missing API key. Pass your key in the X-API-Key header."
  }
}

Rate limit headers

Every authenticated response includes rate limit headers so you can track the active rate-limit window:

X-RateLimit-Limit: 10000
X-RateLimit-Remaining: 9987
X-RateLimit-Reset: 1714953600000

Monthly plan quotas are tracked separately as account usage in the dashboard. Daily and per-minute limits protect the API from sudden bursts and reset automatically as their windows expire. Hosted MCP tool calls count against the same account usage limits.

Unprotected endpoints

GET /health does not require a key and can be used to verify API reachability. Visit northaxiumdata.ca, sign up, and open your dashboard. In the API key section, click Create API key and copy the key from the popup. The full key is only shown when it is created or refreshed.