Anthropic's coding agent

Use TextKit with Claude Code.SMS, phone verification, and real numbers, as capabilities.

Install the TextKit skills once and Claude Code ships SMS and OTP features against the real API, sandbox-first, with the gotchas already encoded.

1. Install the skills

Three SKILL.md files teach Claude Code the API, the verification rules, and SMS compliance, so it writes correct integration code the first time:

curl -sSL https://jointextkit.com/skills/install.sh | sh

textkit · textkit-verify · sms-best-practices

2. Connect the MCP server

Texts, numbers, verification, contacts, broadcasts and automations become tool calls. Run this, then /mcp in Claude Code to sign in:

claude mcp add --transport http textkit https://mcp.jointextkit.com

Every tool and how sign-in works: MCP server docs

3. Ask for the feature

A prompt like this now resolves against the real API, with a sandbox key that simulates everything and costs nothing:

Add phone verification to signup using TextKit Verify
(POST /v1/verify, then /v1/verify/check). Docs:
https://jointextkit.com/docs/verify.md

Everything Claude Code needs is machine-readable: an OpenAPI spec, markdown twins of every docs page, and a single-file llms.txt of the whole documentation set.

/llms.txt
/api/v1/openapi.yaml
/docs/llms-full.txt

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