> ## Documentation Index
> Fetch the complete documentation index at: https://docs.melso.ai/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Melso MCP: https://mcp.melso.ai/mcp (OAuth; one company per connection). Documentation-search MCP: https://docs.melso.ai/mcp; it does not act on customer accounts.
>
> Use the live tool list and respect company membership. Ask the person to approve the exact invoice or tax return version in the signed-in app. Melso's professionals prepare and file included returns after approval; an AI assistant does not file. A prepared file or an approval is not evidence of filing: only the AEAT's reference and receipt are. Keep credentials out of chat and logs.

# API access and Pro pricing — Acceso y precios

> Public docs, private-beta partner keys, and the autónomo Pro plan at €49/month. Ask for API access at hello@melso.ai.

The documentation, the [API reference](https://docs.melso.ai/api/availability.md), the [authentication](https://docs.melso.ai/api/authentication.md) guide and the [OpenAPI document](https://docs.melso.ai/api/openapi.yaml) are public. Reading them needs no account and no key. Calling `https://api.melso.ai/v1` needs a partner key.

> [card] [Versión en español](https://docs.melso.ai/es/api-hacienda.md)
>
> API para Hacienda, Seguridad Social y Verifactu, with the same live, planned and assisted distinctions.

## Labels

| Label | Meaning |
| - | - |
| **Live** | Melso runs it in production today, in the app and, where a tool exists, over MCP. |
| **Private beta** | The partner REST API for a live operation. Melso enables the account and issues the key. Not self-serve. |
| **Planned** | OpenAPI `x-melso-status: preview`. Not callable yet. Fields can still change. |
| **Manual-assisted** | Professionals carry out the act under the company's mandate. The call opens or tracks that work. It does not submit the filing by itself. |

| Path | Who uses it today |
| - | - |
| **App** | A signed-in customer at [app.melso.ai](https://app.melso.ai). |
| **MCP** | A signed-in person's assistant at `https://mcp.melso.ai/mcp`, with OAuth. |
| **REST** | Your server, with a partner key, after Melso enables the account. |
| **Assisted service** | Melso's professionals, after an approval or a submitted case. |

Every operation is labeled on [Availability](https://docs.melso.ai/api/availability.md).

## What is live, and what is not

| Capability | Status | Access |
| - | - | - |
| Invoices registered with VERI\*FACTU or TicketBAI | Live. A person issues. | App, MCP `invoices`, REST private beta |
| Books, expenses, income, journal and statements | Live | App, MCP, REST private beta. Connecting a bank and pushing movements are planned. |
| Modelo 303, 130, 111, 115 and the other calculated returns | Live calculation. Filing is manual-assisted. | App, MCP `taxes`, REST private beta |
| Corporate tax, modelo 200 and 202 | Live calculation. Filing is manual-assisted. | App, MCP `accounting`, REST private beta |
| Alta de autónomo and constituting an S.L. | Live and manual-assisted | App, MCP `gestiones`, cases REST private beta |
| Create a company, mandates, webhooks | Planned | REST contract only |
| Employee affiliation on Sistema RED, settlements, Contrat@, Certific\@2, payroll runs | Planned and manual-assisted when they ship | REST contract only |
| Tax set-aside, administration mailbox, certificates | Planned | REST contract only |

## Pricing

The Pro plan for an autónomo is €49/month. Plus includes the same tax service and more usage of Melso. Confirm Plus, billing frequency and included work on the pricing page before contracting:

* [Español](https://melso.ai/pricing)
* [English](https://melso.ai/en/pricing)
* [Català](https://melso.ai/ca/pricing)

An empresa agrees its service with the Melso team. Partner API access is not the Pro subscription. These docs do not state a separate API price.

## Ask for API access

Write to [hello@melso.ai](mailto:hello@melso.ai) with the module you need first and how many companies you serve. Samples for the main flows are on [Examples](https://docs.melso.ai/api/examples.md).


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