# Mobile Intel API > API docs for Mobile Intel: line type, carrier, region and a verdict for US and Canadian phone numbers. - [Introduction](https://docs.mobileintelapi.com/index.md): Line type, carrier, region and a verdict for US and Canadian phone numbers. - [Quickstart](https://docs.mobileintelapi.com/quickstart.md): Sign up, get your key and look up your first number. - [Authentication](https://docs.mobileintelapi.com/authentication.md): Send your API key in the X-API-Key header. - [Use it with AI agents](https://docs.mobileintelapi.com/ai-agents.md): Give Claude, ChatGPT, n8n or your own agent the ability to check phone numbers. - [Verdicts](https://docs.mobileintelapi.com/concepts/verdicts.md): What valid, risky and invalid mean, and how to read the reasons. - [Line types](https://docs.mobileintelapi.com/concepts/line-types.md): The phone_type field. - [Coverage and data](https://docs.mobileintelapi.com/concepts/coverage.md): Which numbers work, what the carrier field means, and how to send numbers. - [Batching](https://docs.mobileintelapi.com/concepts/batching.md): Look up thousands of numbers quickly and safely. - [Errors](https://docs.mobileintelapi.com/errors.md): Status codes the API returns and what to do about them. - [Limits](https://docs.mobileintelapi.com/limits.md): Batch size, throughput and timeouts. - [Look up one number](https://docs.mobileintelapi.com/api-reference/lookup/look-up-one-number.md): Looks up one +1 number. Send it as E.164 with the plus URL-encoded (`%2B1...`), or as 10 bare digits. - [Look up a batch](https://docs.mobileintelapi.com/api-reference/lookup/look-up-a-batch.md): Looks up up to 10,000 numbers in one call. Results come back in the same order you sent them. Over the public URL, batches of 2,000 or fewer work best. - [Data coverage](https://docs.mobileintelapi.com/api-reference/service/data-coverage.md): How much numbering data the service holds and how current it is. - [Health check](https://docs.mobileintelapi.com/api-reference/service/health-check.md): Open, no key needed. Returns ok when the service is up. ## OpenAPI Specs - [openapi](/openapi.json) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.