# Phone numbers and SMS for AI agents · SimpleSMS

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

Agents keep hitting the same wall: the real world runs on phone numbers.
SimpleSMS turns that into API calls an agent can make.

- **A real phone number of its own**: POST /v1/numbers, $0.95/mo, 10DLC included.
- **An SMS inbox it can act on**: inbound texts as JSON via GET /v1/events.
- **Phone verification as a primitive**: 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.joinsimplesms.com
- Skills: curl -sSL https://joinsimplesms.com/skills/install.sh | sh
- Docs (single file): https://joinsimplesms.com/docs/llms-full.txt
- OpenAPI: https://api.joinsimplesms.com/v1/openapi.yaml

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