Use Nerro from ChatGPT or Claude

Nerro has an MCP server, the standard way AI assistants such as Claude and ChatGPT connect to other apps. Once it's connected, you can ask things like "what does Ava still need before she can take calls?" or "tell Ava to stop asking callers for their email", and the assistant does it in your Nerro account.

Connect it

• Server URL: https://www.nerro.co/api/mcp
• Authentication: an API key as Authorization: Bearer nrz_…. See Authentication to make one. Make a key just for this assistant. A read-only key lets it answer questions but never change anything; it needs full access to change an employee or add knowledge.

In Claude Code, for example:

claude mcp add --transport http nerro https://www.nerro.co/api/mcp --header "Authorization: Bearer nrz_your_key"

Any MCP client that can send a header works the same way: add a "Streamable HTTP" server with that URL and header.

What it can do

• get_account_status: your plan, and what each AI employee still needs before it can take calls.
• list_employees and get_employee: greeting, closing, what it asks callers, what it must never do, and after hours.
• change_employee: the same changes as "Tell it what to change" in Nerro, such as stop or start asking for something, a rule it must never break, when to put calls through, the greeting, the closing and after hours. Each change is checked against the current settings, and one that doesn't fit is refused with the reason.
• add_knowledge: a note, price list or policy saved to Knowledge.
• list_recent_calls and list_recent_leads: your latest calls, chats, texts, leads and messages.

What it can't do

It can't put an employee to work, buy or release numbers, place calls, send texts, change billing, or delete anything: those stay in the app. Changes to an employee need a training round in Nerro before they count for going live. The same limits as the API apply: up to 120 requests a minute per key.