Give every user an agent,right inside your app.

import { Vestra } from '@vestra/sdk';
// get_booking is your API. It only reads, so Bash calls it freely.
const vestra = new Vestra({ tools: { get_booking } });

const run = vestra.user('traveller-42')
  .ask('My 6am flight got cancelled. Get me on the next one.');

for await (const event of run) {
  // Bash stops here for your user's yes
  const asked = event.interaction;
  if (asked?.type !== 'approval') continue;
  const yes = await app.confirm(event.user, asked.summary);
  await event.answer({ approve: yes, present_user: true });
}
console.log(await run.text());

from vestra import Vestra

# get_booking is your API. It only reads, so Bash calls it freely.
vestra = Vestra(tools={"get_booking": lookup_booking})
run = vestra.user("traveller-42").ask("My 6am flight got cancelled. Get me on the next one.")

for event in run:
    # Bash stops here for your user's yes
    asked = event.interaction
    if asked and asked.type == "approval":
        yes = app.confirm(event.user, asked.summary)
        event.answer(approve=yes, present_user=True)

print(run.text())

# Paste your test key once; vestra keeps it on this computer.
$ vestra login

# tools.mjs exports a function per tool your setup declares: get_booking here.
$ vestra ask "My 6am flight got cancelled. Get me on the next one." --user traveller-42 --tools ./tools.mjs

# Bash asks here before it pays. From a script or another terminal, answer by the id it names.
$ vestra answer int_3j9 --approve --present-user

# stream: true answers this turn's events as they happen.
curl -N "$VESTRA_BASE_URL/v1/conversations" \
  -H "Authorization: Bearer $VESTRA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "user_id": "traveller-42", "message": "My 6am flight got cancelled. Get me on the next one.", "stream": true }'

# interaction.created: Bash stops here for your user's yes. Show it, then answer with what they chose.
curl "$VESTRA_BASE_URL/v1/interactions/int_3j9/answer" \
  -H "Authorization: Bearer $VESTRA_API_KEY" \
  -d '{ "approve": true, "present_user": true }'

// mcp.json: any MCP client, your key as the bearer
{ "mcpServers": { "vestra": { "type": "http", "url": "https://api.vestra.ai/v1/mcp",
    "headers": { "Authorization": "Bearer vk_test_..." } } } }

// then the ask, as a tool call
{ "method": "tools/call", "params": { "name": "ask",
    "arguments": { "user": "traveller-42", "message": "My 6am flight got cancelled. Get me on the next one." } } }

// and the yes, once your user saw it
{ "method": "tools/call", "params": { "name": "answer", "arguments": { "interaction": "int_3j9", "approve": true, "present_user": true } } }