How do I install the Vapi Calls skill?

Run npx skillmds@latest add technickai-openclaw-config/vapi-calls in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Vapi Calls safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Vapi Calls?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Vapi Calls free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Vapi Calls?

TechNickAI (@technickai-openclaw-config) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Vapi Calls by technickai-openclaw-config

Name: Vapi Calls
Rating: 4.666666666666667 (3 reviews)
Author: TechNickAI

Vapi Calls

Make outbound phone calls via Vapi voice AI. Use when the agent needs to call someone on the phone for any reason (reminders, notifications, requests to businesses, or any task that benefits from a real voice conversation). Requires VAPI_API_KEY, a provisioned phone number, and an assistant configured in Vapi.

TechNickAI Updated Sep 10, 2026

File contents

Vapi Voice Calls

Make real outbound phone calls through Vapi's voice AI platform.

Prerequisites

Check that these are set in your environment:

VAPI_API_KEY
VAPI_ASSISTANT_ID
VAPI_PHONE_NUMBER_ID

If any are missing, read references/setup.md and complete first-time setup before proceeding.

Making a Call

Use the Vapi POST /call endpoint with:

phoneNumberId and assistantId from your config
customer.number — the phone number to call (E.164 format)
assistantOverrides.model.systemPrompt — the full system prompt including task-specific instructions for this call
assistantOverrides.firstMessage — a contextual opening line for this specific call

The base assistant defines voice, transcriber, and personality defaults. The override injects what THIS call is about.

System Prompt Structure for Each Call

The base prompt (heart-centered foundation + agent personality + "You are on a live phone call")
A TASK: section with specific instructions for this call

Everything the voice agent needs to know goes in the override. The voice agent has no memory between calls.

After the Call

Poll GET /call/{id} to check status and endedReason. Key values:

assistant-ended-call — completed normally
customer-did-not-answer — no pickup, consider retrying or texting first
pipeline-error-* — voice provider issue, check configuration

Notes

Vapi built-in voices are free. ElevenLabs voices require a paid ElevenLabs plan.
Cost is ~$0.05-0.07/min, pay-as-you-go.
Template variables ({{var}}) can be used in prompts, resolved from call metadata.

---name: vapi-callsdescription: Make outbound phone calls via Vapi voice AI. Use when the agent needs to call someone on the phone for any reason (reminders, notifications, requests to businesses, or any task that benefits from a real voice conversation). Requires VAPI_API_KEY, a provisioned phone number, and an assistant configured in Vapi.---# Vapi Voice CallsMake real outbound phone calls through Vapi's voice AI platform.## PrerequisitesCheck that these are set in your environment:- `VAPI_API_KEY`- `VAPI_ASSISTANT_ID`- `VAPI_PHONE_NUMBER_ID`If any are missing, read [references/setup.md](references/setup.md) and completefirst-time setup before proceeding.## Making a CallUse the Vapi `POST /call` endpoint with:- `phoneNumberId` and `assistantId` from your config- `customer.number` — the phone number to call (E.164 format)- `assistantOverrides.model.systemPrompt` — the full system prompt including task-specific instructions for this call- `assistantOverrides.firstMessage` — a contextual opening line for this specific callThe base assistant defines voice, transcriber, and personality defaults. The overrideinjects what THIS call is about.### System Prompt Structure for Each Call1. The base prompt (heart-centered foundation + agent personality + "You are on a live phone call")2. A `TASK:` section with specific instructions for this callEverything the voice agent needs to know goes in the override. The voice agent has nomemory between calls.### After the CallPoll `GET /call/{id}` to check status and `endedReason`. Key values:- `assistant-ended-call` — completed normally- `customer-did-not-answer` — no pickup, consider retrying or texting first- `pipeline-error-*` — voice provider issue, check configuration## Notes- Vapi built-in voices are free. ElevenLabs voices require a paid ElevenLabs plan.- Cost is ~$0.05-0.07/min, pay-as-you-go.- Template variables (`{{var}}`) can be used in prompts, resolved from call metadata.

Frequently asked questions