# Phone numbers and SMS for AI agents · TextKit

Source: https://jointextkit.com/agents
Index: https://jointextkit.com/llms.txt

More and more businesses let an agent handle their texting: appointment
reminders, order updates, answers to customers who text in. TextKit turns
that into API calls an agent can make, from the business's own registered
number, with the same consent, opt-out and content checks as every other
message.

- **A registered business number**: POST /v1/numbers, $0.95/mo; we verify your business and file the 10DLC registration for you, registry fees billed separately. Until the carriers approve it, the number texts only your own verified numbers.
- **An SMS inbox it can act on**: inbound texts as JSON via GET /v1/events.
- **Phone verification as a primitive**: confirm your users' phone numbers with POST /v1/verify then /v1/verify/check; billed only on success.
- **Know what kind of number it is**: GET /v1/lookup/{phone}, line type and carrier before it sends.

Machine-readable everything:
- MCP: https://mcp.jointextkit.com
- Skills: curl -sSL https://jointextkit.com/skills/install.sh | sh
- Docs (single file): https://jointextkit.com/docs/llms-full.txt
- OpenAPI: https://api.jointextkit.com/v1/openapi.yaml

Free sandbox key, instant, no card: https://jointextkit.com/console