# Standards for AI agents

Eight open standards a product can publish or follow for AI agents. For each, how many of the products we drove use it, which ones, and how to add it.

Source: https://agentdrives.com/standards · as data: https://agentdrives.com/standards.json · from our drives of 151 products, 1–24 Oct 2026 · licence CC BY 4.0

## What a product publishes for agents

How an agent finds, reads and calls a product.

- [MCP](https://agentdrives.com/standards/mcp.md): A server that turns a product's actions into tools an agent can call. Have an MCP server: 130 of 151 products (https://agentdrives.com/data/facts?via=md#mcp.any).
- [llms.txt](https://agentdrives.com/standards/llms-txt.md): A Markdown map of a product's docs, written for language models. Publish an llms.txt: 131 of 151 products (https://agentdrives.com/data/facts?via=md#surface.llms_txt).
- [OpenAPI](https://agentdrives.com/standards/openapi.md): A machine-readable description of every route of an API. Publish an OpenAPI document: 104 of 151 products (https://agentdrives.com/data/facts?via=md#surface.openapi).

## How an agent says who it is

How a product can tell a signed agent from an anonymous bot.

- [Web Bot Auth](https://agentdrives.com/standards/web-bot-auth.md): An agent signs each request; a site's bot check can verify who sent it. The bot check let it through: 19 of 151 products (https://agentdrives.com/data/facts?via=md#bot.let_in).
- [Signed agents](https://agentdrives.com/standards/signed-agents.md): Agents a bot-check vendor has verified, which a site can let through. Let a known signed agent past their edge check: 10 of 13 products (https://agentdrives.com/data/facts?via=md#who.edge_signed_page).

## What a product allows agents to do

The file where a product tells agents and crawlers where they may go.

- [robots.txt for AI agents](https://agentdrives.com/standards/robots-txt-ai.md): The file that tells crawlers and agents which pages to leave alone. robots.txt closes the sign-up page: 15 of 151 products (https://agentdrives.com/data/facts?via=md#who.robots_closed).

## How an agent pays

Agentic commerce: a product charges an agent per request, without a checkout.

- [x402](https://agentdrives.com/standards/x402.md): A 402 answer an agent pays in a stablecoin, request by request. Offer x402: 9 of 151 products (https://agentdrives.com/data/facts?via=md#pay.x402).
- [MPP](https://agentdrives.com/standards/mpp.md): A 402 payment challenge an agent pays by card or stablecoin. Offer MPP: 2 of 151 products (https://agentdrives.com/data/facts?via=md#pay.mpp).