# Frailen

> Frailen is agent infrastructure for software companies. The company connects its API once, and agents operate its product on behalf of its users (the first one is a support agent inside the product). Every agent runs on the same runtime, which acts with the user's own permissions, confirms anything with damage (money, bulk changes, notices to third parties, anything that can't be undone), reads every write back from the API to check it held, and records everything in a log that only grows.

For a coding agent integrating Frailen into a company's product:

- The agent never goes into the company's database: everything goes through its API, with the person's permissions.
- Frailen holds no key it could use to sign on anyone's behalf. The company's backend signs the session (ES256, with its JWKS) and exposes `POST /frailen/token` (RFC 8693), which exchanges it for an API token for that person, valid for 300 seconds or less.
- The agent's tools are YAML tool cards, one per API operation: method, route, parameters (JSON Schema), pattern, damage, how it is read back and how it is undone. They are built from the OpenAPI and approved by a person at the company. The card format's keys are in Spanish (`metodo`, `ruta`, `dano`, `relee_con`…).
- The chat runs in an iframe served by Frailen. The company's page mounts it with `frailen.js`, a `<script>` tag, or with `@frailen/chat-web`, and passes along what the person has open as context.
- Everything is tested in staging first, with a bench of cases graded by reading the API back.

## Set it up

If you're a coding agent asked to set up Frailen, follow [/get-started.md](/get-started.md): a step-by-step playbook (branch, tool cards from the OpenAPI, token route, chat tag, test bench, AGENTS.md rules), with when to stop and ask.

- [Build with agents](/agentes.md): copyable prompts to set up Frailen in a repository (tool cards, token route, chat, test bench, security review), the rules to add to AGENTS.md, and a Claude Code command. Work on a branch; a person approves and publishes.

## Pages, in Markdown

Every page has a Markdown version: add `.md` to its path. The whole site in one file: [/llms-full.txt](/llms-full.txt).

- [Home](/index.md): what Frailen is, one request from the inside, compared with wiring a model to your API yourself, examples across industries.
- [How it works](/producto.md): one turn from the inside, the brake set by the damage, the read-back and the panel.
- [For developers](/desarrolladores.md): tool cards, identity, the embedded chat and the test bench.
- [Security and data](/seguridad.md): identity, what is stored, isolation per company and what isn't there yet.
- [Pricing](/precios.md): a monthly minimum per company with a quota of tasks. These are reference prices.

## Not yet

- The CLI (`@frailen/cli`) and the MCP for coding agents are under construction.
- There is no public package release: `@frailen/chat-web` isn't published yet.

The same file in Spanish: [/es/llms.txt](/es/llms.txt)

## Contact

Write to hello@frailen.com, or see [/contacto](/contacto).