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📞 AI phone call

\n${body}\n`,\n { headers: { \"content-type\": \"text/html\" } },\n );\n}\n\nconst FORM = `\n

Enter a number and Vapi rings it — an AI (${MODEL}) chats with whoever picks up.

\n`;\n\nexport default async function (req: Request): Promise {\n if (req.method !== \"POST\") return page(FORM);\n if (!Deno.env.get(\"VAPI_API_KEY\") || !Deno.env.get(\"VAPI_PHONE_NUMBER_ID\")) {\n return page(`

⚠️ Set the VAPI_API_KEY and VAPI_PHONE_NUMBER_ID env vars first — see README.md.

`);\n }\n const number = String((await req.formData()).get(\"number\") ?? \"\").trim();\n try {\n const call = await placeCall(number);\n return page(`

☎️ Calling ${esc(number)}… (call ${esc(String(call.id ?? \"\"))})

Make another call

`);\n } catch (e) {\n return page(`

❌ ${esc(String(e))}

Try again

`);\n }\n}\n","createdAt",["D",1781209168141],"branchVersion","branchId","7fbd981c-a98f-4c47-8a68-f2ea92fa26b1",{"_30":44,"_32":43,"_33":21,"_35":45,"_37":46,"_39":14,"_40":41,"_24":25},"README.md","019eb856-fc0f-726a-86e9-6492a591bfad","# What's the simplest way to make an AI phone call?\n\nThis val serves a tiny form: you type a phone number, Vapi rings it, and an AI has a conversation with whoever answers. Vapi hosts the telephony and the live audio bridge to the model, so the whole demo is one POST to `https://api.vapi.ai/call` — one file, about seventy lines, no imports.\n\n## Setup\n\n1. **Remix this val** to get your own copy.\n2. **Get a Vapi API key** — sign up at [dashboard.vapi.ai](https://dashboard.vapi.ai) and copy your private key, then paste it as an env var in your val:\n\n 👉 [Add `VAPI_API_KEY` here](https://www.val.town/x/templates/vapi-phone-call/environment-variables?key=VAPI_API_KEY)\n\n3. **Create a phone number** in the Vapi dashboard (free Vapi numbers work for testing) and copy its ID:\n\n 👉 [Add `VAPI_PHONE_NUMBER_ID` here](https://www.val.town/x/templates/vapi-phone-call/environment-variables?key=VAPI_PHONE_NUMBER_ID)\n\n## Test it\n\nOpen the HTTP endpoint of [`main.ts`](https://www.val.town/x/templates/vapi-phone-call/code/main.ts), type your own number in E.164 format (`+15551234567`), and hit **Call me**. Your phone rings and the AI speaks first. Without the env vars set, the page shows a setup reminder instead of erroring.\n\n## Files\n\n- [`main.ts`](https://www.val.town/x/templates/vapi-phone-call/code/main.ts) — the form, and the one `fetch` that places the call\n\n## Notes\n\n- `FIRST_MESSAGE`, `SYSTEM_PROMPT`, `MODEL`, and `VOICE` at the top of `main.ts` control what the AI opens with, how it behaves, and how it sounds.\n- Call screening (like Google Voice's) answers before you do, so the AI spends its greeting on the screening robot and you join to silence — turn screening off when testing.\n- Free Vapi numbers are US-only and meant for testing.\n- From here you can add tool calls, transcripts, and post-call analysis — see [docs.vapi.ai](https://docs.vapi.ai).\n- Only call numbers you have consent to call — automated calls without consent violate TCPA/FCC 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Diff · v1