Quickstart | SingularityAPI

Four steps: create a key, send a request, check the receipt, then go deeper.

1. Get an API key

Open the dashboard at https://app.singularityapi.dev, go to API keys, and click Create.

Your key (sapi_...) is shown once, at creation. Copy it somewhere safe — you cannot view it again.

New accounts start with a $1 credit grant, so you can make real requests right away.

2. Make your first request

Set SINGULARITY_API_KEY in your environment and send a chat completion. The example model here is deepseek-v4-flash; see Models & Pricing for the full catalog.

$ curl https://api.singularityapi.dev/v1/chat/completions \
>   -H "Authorization: Bearer $SINGULARITY_API_KEY" \
>   -H "Content-Type: application/json" \
>   -d '{
>     "model": "deepseek-v4-flash",
>     "messages": [{"role": "user", "content": "Say hello."}]
>   }'

3. Check the receipt

Every response carries an x-singularity-request-id and an x-singularity-receipt-id header. Pull the receipt for the exact tokens, cost, and latency of that request:

$ curl https://api.singularityapi.dev/v1/receipts/RECEIPT_ID \
>   -H "Authorization: Bearer $SINGULARITY_API_KEY"

Every answer, on the record.

4. Next steps

Models & Pricing

See every model, its limits, and its exact price.

Contracts

Give your calls a permanent, dashboard-controlled model name.

Streaming

Stream responses over standard OpenAI-compatible SSE.

Errors & Rate Limits

Handle the error envelope and the beta rate limit.