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agent-native · Voice & Phone · Verified 2026-10-09

CosVoice

Listed on The Agent-Native Index

Your AI Agent gets its own phone number

What it does

CosVoice provisions a phone number and an email address for an assistant. The homepage describes three uses: the owner calls or texts the line, the assistant places calls (including booking a table), and the line answers when the owner cannot. After a call, the owner gets a written summary. The skill says the voice is full duplex and that the line says it is an AI assistant when asked.

The agent drives the line over MCP: search numbers, create the line, place a call, poll for the outcome, read transcripts and email, and send email from the line’s own address (handle@bot.cosvoice.com on the skill page). Calls are asynchronous. The skill says to poll get_call or wait for a call.completed webhook. A call is capped at 10 minutes. The line never pays and never reads out a card.

Current prices are the live pricing page and the skill page, checked 2026-10-09: Starter $29/month with 100 minutes, Plus $79/month with 300 minutes, Pro $199/month with 1,000 minutes, overage $0.25 per minute on paid plans. A 7-day trial is described as $0, with a card on file, then $29 for Starter unless the owner cancels or moves plans. The packaging README still lists older bundles (Starter 60 minutes, Plus $69/200, Pro $149/600). Those README figures are not the live page.

The skill says calls and texts go to US and Canada numbers only. The pricing page says available numbers are US area codes and that Canada is next. One new number per paid month per plan is the skill’s account rule.


Agent-facing interfaces

How agents onboard

Interaction pattern: URL Onboarding

Read https://cosvoice.com/skill and follow the instructions to connect CosVoice.

See the full onboarding section in the dossier.

Protocol surface

Interface Detail
URL onboarding https://cosvoice.com/skill
MCP https://cosvoice.com/mcp (Streamable HTTP, OAuth or bearer)
OpenAPI https://cosvoice.com/openapi.json — REST base https://cosvoice.com/api/v1
OAuth discovery /.well-known/oauth-protected-resource and /.well-known/oauth-authorization-server
Webhook set_webhook for call.completed, and set_bot_push for assistant wakeups, as written on the skill page
Registry com.cosvoice/cosvoice

Verification

Last verified 2026-10-09.

Sources: