Developer API

An API your future self will thank you for.

Provision, route and observe voice calls programmatically. REST + webhooks + SDKs, with the OpenAPI spec in your editor.

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Provision a numbercurl

curl https://api.krosai.com/v1/phone-numbers \
  -H "Authorization: Bearer $KROSAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "country": "NG",
    "agent_id": "agt_a1b2c3"
  }'

RESTful, OpenAPI-first

Provision numbers, manage agents, query call history — everything in the cockpit is also in the API. OpenAPI spec and Postman collection downloadable.

Predictable resource URLs
JSON request/response everywhere
Idempotency keys on writes

Event webhooks

Subscribe to call.started, call.ended, call.failed, transcription.ready and more. HMAC-signed payloads, automatic retries with exponential backoff.

Per-endpoint event filtering
Delivery history and replay
Active/inactive toggle without losing config

Scoped API keys

Issue keys with granular permissions and per-key analytics. Rotate or revoke instantly without disrupting other integrations.

SDKs and code samples

Official SDKs for Node, Python and Go. Copy-paste-ready snippets for every endpoint in the docs.

Ship voice AI faster

Read the docs, grab an SDK, and have your first call routed in under 10 minutes.

Read the Docs Get API Key