Surplus Intelligence

Open Market for Models

Your API calls, routed to the cheapest offer.
Your surplus capacity, sold to the highest bidder.

One API, OpenAI-compatible

Already on OpenAI or OpenRouter? Just change your base URL and cut your inference bill 38%.

1export SURPLUS_API_KEY="inf_..."2 3curl https://api.surplusintelligence.ai/v1/chat/completions \4# was: openrouter.ai/api/v15  -H "Authorization: Bearer $SURPLUS_API_KEY" \6  -H "Content-Type: application/json" \7  -d '{8    "model": "claude-opus-4.8",9    "messages": [{"role": "user", "content": "Hello from Surplus"}],10    "stream": true11  }'

Same request. Same SDK. Same models. New base URL. Lower costs.

Buyers pay less for calling AI models.
Sellers turn your API credits into $.

Buyers

$99$10

1·Buy credits

sk-••••••••

2·Get API key

Claude Opus 4.8

claude-opus-4-8

42%cheaper

in $2.35/M · out $11.76/M

3·Save on API calls

sk-prov-••••

1·Paste provider key

GPT-5.5

gpt-5.5

37%cheaper

in $1.85/M · out $9.20/M

2·List model offers

USDC+$0.62USDC+$1.40

3·Earn USDC

Sellers