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API keys

All requests require an API key passed as a Bearer token: 
Authorization: Bearer YOUR_API_KEY
For GET requests, you may also pass the key as a query parameter: 
GET /context?user_id=alice&api_key=YOUR_API_KEY

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Tiers

TierMonthly encode limit
Free1,000
Pro50,000
Builder500,000
UnlimitedUnlimited
Exceeding your monthly limit returns HTTP 429 with an upgrade link.

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Getting a key

API keys are available at spectralmemory.com. During beta, keys are issued manually — contact via the site.

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Demo endpoints

The /demo/* endpoints (/demo/encode, /demo/context, /demo/flush, /demo/reset) require no API key and share a single public state. They are rate-limited and reset periodically. Use them to explore the API without an account. 
curl -X POST https://api.spectralmemory.com/demo/encode \
  -H "Content-Type: application/json" \
  -d '{"label": "USER.gpu", "value": "RTX5090"}'
Demo state is shared across all unauthenticated users. Do not store sensitive values via the demo endpoints.