sinch-number-lookup-apilisted

# Sinch Number Lookup API ## Overview Queries phone numbers for carrier, line type, porting, SIM swap, VoIP detection, and reassigned number detection. Used for fraud prevention, routing, and data enrichment. One number per request — no batch endpoint. ## Agent Instructions Before generating code, gather from the user: **approach** (SDK or direct API calls) and **language** (Node.js, Python, Java, .NET/C#, curl). Do not assume defaults. When the user chooses **SDK**, refer to [sinch-sdks](../sinch-sdks/SKILL.md) for installation, client initialization, and language-specific references. Note: Number Lookup is only supported in **Node.js** and **Python** (partial) SDKs — for Java and .NET, use direct HTTP calls. ## Getting Started ### Agent Credentials handling Store credentials in environment variables — never hardcode tokens or keys in commands or source code: ```bash export SINCH_PROJECT_ID="your-project-id" export SINCH_KEY_ID="your-key-id" export SINCH_KEY_SECRET="your-key-secret" export SINCH_ACCESS_TOKEN="your-oauth-token" ``` ### Authentication Ensure that authentication headers are properly set when making API calls. The Number Lookup API uses Bearer token authentication: ```bash -H "Authorization: Bearer $SINCH_ACCESS_TOKEN" ``` See [sinch-authentication](../sinch-authentication/SKILL.md) for full setup, most importantly how to obtain `{SINCH_ACCESS_TOKEN}` (OAuth2 client-credentials — do not mint your own JWT). ### Base URL `https://lookup.api.sinch.co