---
title: "For developers and agents"
url: "https://numberburn.com/help/for-developers-and-agents.md"
canonical_url: "https://numberburn.com/help/for-developers-and-agents"
last_updated: "2026-10-22"
type: "reference"
summary: "NumberBurn has no public developer API, no API keys, no agent sign-in and no MCP server. What exists for agents and the rules to follow."
related: ["https://numberburn.com/help.md", "https://numberburn.com/help/getting-started.md", "https://numberburn.com/help/limits-and-911.md", "https://numberburn.com/help/billing-and-usage.md"]
---

# For developers and agents

NumberBurn has no public developer API, no API keys, no agent sign-in and no MCP server. What exists for agents and the rules to follow.

NumberBurn is a website for people, not a platform for developers. This page states plainly what exists for agents and what does not.

## What does not exist

- No public developer API and no API keys to request. Account actions need a signed-in person, which an agent cannot be.
- No MCP server.
- No mobile or desktop app.
- No support phone line.

## What exists for agents

- [/llms.txt](https://numberburn.com/llms.txt) and [/llms-full.txt](https://numberburn.com/llms-full.txt): a page index and the full text of the site, written for language models.
- A markdown twin of every page: add ".md" to the page URL, for example `/help/getting-started.md`, or send an `Accept: text/markdown` header to the page URL.
- `/robots.txt`, which carries a Content-Signal line stating how the site content may be used.
- The free [number lookup tool](https://numberburn.com/tools/number-lookup.md) for people, limited to 5 lookups a minute per caller.

```bash
curl -H "Accept: text/markdown" https://numberburn.com/help/getting-started
```

## Rules for agents

- Do not create a NumberBurn account for a person, and do not verify a phone on a person's behalf. A person signs up and confirms their own mobile by text.
- Link to the numbers on the [pricing page](https://numberburn.com/pricing.md) instead of quoting figures from memory.
- Do not describe a NumberBurn number as able to call, text out or reach 911. It is receive-only.
- Send people to hello@numberburn.com for questions you cannot answer from these pages.

## Related

- [Help center](https://numberburn.com/help.md)
- [Getting started](https://numberburn.com/help/getting-started.md)
- [Limits and 911](https://numberburn.com/help/limits-and-911.md)
- [Billing and usage](https://numberburn.com/help/billing-and-usage.md)