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

# Add Id Attachment

> Allows the client to add an attachment to a Legal Identity application.

## Overview

Allows the client to add an attachment to a Legal Identity application.

## Authentication

Requires a valid JWT bearer token.

## Notes

This endpoint uses the request schema notation described in [Pattern matching](/guides/pattern-matching).


## OpenAPI

````yaml /test-api/openapi.yaml post /Agent/Legal/AddIdAttachment
openapi: 3.1.0
info:
  title: Neuron Agent API
  version: 1.0.0
  description: |-
    The Agent API exposes core Neuron functionality over HTTP so services can
    operate without a persistent XMPP connection. Endpoints are grouped by
    capability, starting with Accounts and XMPP messaging.
servers:
  - url: https://{host}
    variables:
      host:
        default: neuron.example.com
        description: Neuron domain issued to you.
security:
  - bearerAuth: []
tags:
  - name: Accounts
  - name: Crypto
  - name: Open intelligence
  - name: Legal and contracts
  - name: State machines
  - name: Storage
  - name: Tokens
  - name: Wallet
  - name: XMPP messaging
paths:
  /Agent/Legal/AddIdAttachment:
    post:
      tags:
        - Legal and contracts
      summary: Add Id Attachment
      description: Allows the client to add an attachment to a Legal Identity application.
      operationId: post_Agent_Legal_AddIdAttachment
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                keyId:
                  type: string
                legalId:
                  type: string
                nonce:
                  type: string
                keySignature:
                  type: string
                requestSignature:
                  type: string
                attachmentBase64:
                  type: string
                attachmentFileName:
                  type: string
                attachmentContentType:
                  type: string
              additionalProperties: true
              required:
                - keyId
                - legalId
                - nonce
                - keySignature
                - requestSignature
                - attachmentBase64
                - attachmentFileName
                - attachmentContentType
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: object
                properties:
                  Identity:
                    type: object
                    additionalProperties: true
                additionalProperties: true
                required:
                  - Identity
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer

````