For developers and agents

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 and /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 for people, limited to 5 lookups a minute per caller.

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 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.